How does backflow occur?

Backflow is generated by cross-connections that have the possibility of permitting pollutants into the drinking water system. Back siphonage can happen when the pressure in a tank is less than the water system's pressure.

Can check valves prevent backflow?

Check valves offer a basic form of backflow prevention, stopping water from flowing in the wrong direction.

Are dual check valves the same as backflow preventers?

Double-check valves (also known as double-check assembly) are somewhere in between a check valve and a backflow preventer. They are usually installed in places where backflow requires to be contained with a one-way valve, but the investment needs to be less than a backflow preventer.

WATTS Backflow Preventers

Designed to prevent potable water contamination from the reverse flow of polluted water. Capable of bearing up to 180 psi pressures and have a maximum operating temperature of 180 degrees F

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Watts backflow preventers are designed to stop potable water contamination from the reverse flow of polluted water. They are employed in industrial settings where chemicals are connected to water...Read more

WATTS -

Double Check Backflow Preventers

Style	Model	Item	Price (inc. VAT)
A	1 1/2 007M2-QT	Backflow Preventer	£1,265.70
B	3/4 LF007M3-QT	Backflow Preventer	£478.53
C	1/2 LF007-QT	Backflow Preventer	£491.13
D	2 LF007M1-QT	Backflow Preventer	£1,456.70
E	1/2 007-QT	Backflow Preventer	£503.35
A	1 1/2 LF007M2-QT-S	Backflow Preventer	£1,581.37
F	1 1/2 LF007M2-QT	Backflow Preventer	£1,325.68
G	1/2 LF007-QT-S	Backflow Preventer	£666.05
A	1 1/4 007M2-QT	Backflow Preventer	£1,005.15
F	1 1/4 LF007M2-QT	Backflow Preventer	£1,177.83
F	1 LF007M1-QT	Backflow Preventer	£525.28
H	3/4 LF007M3-QT-PRESS	Double Check Valve Assembly	£550.48
H	1 LF007M1-QT-PRESS	Double Check Valve Assembly	£615.66
H	1/2 LF007-QT-PRESS	Double Check Valve Assembly	£409.24

WATTS -

AMES Maxim Series M300 Double Check Detector Assemblies

Style	Model	Inlet Connection	Inlet Size	Outlet Connection	Price (inc. VAT)
A	M300-OSY-CFM 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£5,586.44	RFQ
A	M300-DOSY-LM 4	Flanged Joint	4"	Flanged Joint	£9,181.17	RFQ
A	M300-OSY-GPM 4	Flanged Joint	4"	Flanged Joint	£8,250.55	RFQ
A	M300-OSY-GPM 3	Flanged Joint	3"	Flanged Joint	£6,362.67	RFQ
A	M300-OSY-CFM 8	Flanged Joint	8"	Flanged Joint	£15,838.95	RFQ
A	M300-OSY-GPM 8	Flanged Joint	8"	Flanged Joint	£15,838.95	RFQ
A	M300-OSY-CFM 4	Flanged Joint	4"	Flanged Joint	£8,250.55	RFQ
A	M300-OSY-CFM 6	Flanged Joint	6"	Flanged Joint	£8,753.05	RFQ
A	M300-OSY-GPM 6	Flanged Joint	6"	Flanged Joint	£8,753.05	RFQ
A	M300-OSY-CFM 3	Flanged Joint	3"	Flanged Joint	£6,362.67	RFQ
A	M300-DOSY-LM 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£6,174.58	RFQ
A	M300-OSY-CFM 10	Flanged Joint	10"	Flanged Joint	£22,721.17	RFQ
A	M300-DOSY-LM 3	Flanged Joint	3"	Flanged Joint	£7,050.44	RFQ
A	M300-OSY-GPM 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£5,586.44	RFQ
A	M300-OSY-GPM 10	Flanged Joint	10"	Flanged Joint	£22,721.17	RFQ
A	M300-DOSY-C 8	Flanged Joint	8"	Flanged Joint	£15,838.95	RFQ
A	M300-BFG-GPM 6	Grooved Joint	6"	Grooved Joint	£9,175.55	RFQ
A	M300-BFG-GPM 2 1/2	Grooved Joint	2 1/2"	Grooved Joint	£6,000.52	RFQ
A	M300-BFG-CFM 2 1/2	Grooved Joint	2 1/2"	Grooved Joint	£6,000.52	RFQ
A	M300-BFG-CFM 3	Grooved Joint	3"	Grooved Joint	£6,778.14	RFQ
B	M300-BFG-GPM 3	Grooved Joint	3"	Grooved Joint	£6,778.14	RFQ
A	M300-BFG-CFM 6	Grooved Joint	6"	Grooved Joint	£9,175.55	RFQ
A	M300-BFG-CFM 4	Grooved Joint	4"	Grooved Joint	£8,661.83	RFQ
A	M300-BFG-GPM 4	Grooved Joint	4"	Grooved Joint	£8,661.83	RFQ

WATTS -

LF957RPDA Series Reduced Pressure Zone Assemblies

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Type	Price (inc. VAT)
A	LF957RPDA-DOSY-CFM 2 1/2	2 1/2"	110° F	175 PSI	33° F	2-1/2"	Kit	£5,366.09	RFQ
A	LF957RPDA-DOSY-GPM 2 1/2	2 1/2"	110° F	175 PSI	33° F	2-1/2"	Kit	£5,366.09	RFQ
B	LF957RPDA-OSY-LM 2 1/2	2 1/2"	110° F	175 PSI	33° F	2-1/2"	Kit	£5,956.70	RFQ
C	LF957-RPDA-OSY-CFM 2 1/2	2-1/2"	110 Degree F	12.1 Bar	33 Degree F	2-1/2"	Valve to Accessory	£4,748.51	RFQ
B	LF957RPDA-DOSY-LM 2 1/2	2-1/2"	110 Degree F	12.1 Bar	33 Degree F	2-1/2"	Valve to Accessory	£5,246.77	RFQ
C	LF957RPDA-OSY-GPM 2 1/2	2-1/2"	110 Degree F	12.1 Bar	33 Degree F	2-1/2"	Valve to Accessory	£4,748.51	RFQ
B	LF957RPDA-OSY-LM 3	3"	110° F	175 PSI	33° F	3"	Kit	£5,166.79	RFQ
C	LF957-RPDA-OSY-CFM 3	3"	110 Degree F	12.1 Bar	33 Degree F	3"	Valve to Accessory	£5,272.05	RFQ
C	LF957RPDA-OSY-GPM 3	3"	110 Degree F	12.1 Bar	33 Degree F	3"	Valve to Accessory	£5,272.05	RFQ
A	LF957RPDA-DOSY-CFM 3	3"	110° F	175 PSI	33° F	3"	Kit	£5,957.02	RFQ
A	LF957RPDA-DOSY-GPM 3	3"	110° F	175 PSI	33° F	3"	Kit	£5,957.02	RFQ
B	LF957RPDA-DOSY-LM 3	3"	110 Degree F	12.1 Bar	33 Degree F	3"	Valve to Accessory	£5,836.30	RFQ
A	LF957RPDA-DOSY-CFM 4	4"	110° F	175 PSI	33° F	4"	Kit	£7,781.75	RFQ
B	LF957RPDA-DOSY-LM 4	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Valve to Accessory	£7,659.62	RFQ
B	LF957RPDA-OSY-LM 4	4"	110° F	175 PSI	33° F	4"	Kit	£6,780.95	RFQ
C	LF957-RPDA-OSY-CFM 4	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Valve to Accessory	£6,887.64	RFQ
C	LF957RPDA-OSY-GPM 4	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Valve to Accessory	£6,887.64	RFQ
A	LF957RPDA-DOSY-GPM 4	4"	110° F	175 PSI	33° F	4"	Kit	£7,781.75	RFQ
B	LF957RPDA-OSY-LM 6	6"	110° F	175 PSI	33° F	6"	Kit	£9,815.60	RFQ
C	LF957RPDA-OSY-GPM 6	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Valve to Accessory	£9,922.29	RFQ
B	LF957RPDA-DOSY-LM 6	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Valve to Accessory	£11,090.10	RFQ
C	LF957-RPDA-OSY-CFM 6	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Valve to Accessory	£9,922.29	RFQ
A	LF957RPDA-DOSY-GPM 6	6"	110° F	175 PSI	33° F	6"	Kit	£11,212.21	RFQ
B	LF957RPDA-DOSY-GPM 8	8"	110° F	175 PSI	33° F	8"	Kit	£16,342.91	RFQ
B	LF957RPDA-OSY-LM 8	8"	110° F	175 PSI	33° F	8"	Kit	£16,238.39	RFQ

WATTS -

LF909 Large Series Reduced Pressure Zone Assemblies

Style	Model	Mfr. Series	Body Material	Inlet Connection	Min. Temp.	Outlet Connection	Outlet Size	Outlet Type	Seat Material	Price (inc. VAT)
A	3 DLF909-OSY	-	Cast Iron	-	-	-	-	-	-	-	RFQ
B	2 1/2 DLF909-OSY	-	Cast Iron	-	-	-	-	-	-	-	RFQ
C	4 DLF909-OSY	-	Cast Iron	-	-	-	-	-	-	-	RFQ
D	LF909M1-NRS 8	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	8"	Flanged Joint	Stainless Steel	£19,940.98	RFQ
E	LF909M1-DOSY 10	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	10"	Flanged Joint	Stainless Steel	£46,824.69	RFQ
F	LF909M1-DNRS 10	LF909 Large	Cast Iron	-	33 Degree F	-	10"	Flanged Joint	Stainless Steel	£29,027.80	RFQ
G	LF909M1-OSY-S-FDA 10	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	10"	Flanged Joint	Stainless Steel	£48,739.66	RFQ
H	LF909M1-NRS-S-FDA 10	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	10"	Flanged Joint	Stainless Steel	£46,003.19	RFQ
I	LF909M1-LF 8	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	8"	Flanged Joint	Stainless Steel	£20,652.90	RFQ
G	LF909M1-QT-FDA 8	LF909 Large	Cast Iron	-	33 Degree F	-	8"	Flanged Joint	Stainless Steel	£39,649.78	RFQ
I	LF909M1-LF 10	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	10"	Flanged Joint	Stainless Steel	£27,354.46	RFQ
J	LF909M1-NRS-S-FDA 8	LF909 Large	Cast Iron	-	33 Degree F	-	8"	Flanged Joint	Stainless Steel	£19,940.98	RFQ
E	LF909M1-OSY 10	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	10"	Flanged Joint	Stainless Steel	£43,760.22	RFQ
D	LF909M1-NRS 10	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	10"	Flanged Joint	Stainless Steel	£29,027.80	RFQ
G	LF909M1-OSY-S-FDA 8	LF909 Large	Cast Iron	-	33 Degree F	-	8"	Flanged Joint	Stainless Steel	£35,749.39	RFQ
F	LF909M1-DNRS 8	LF909 Large	Cast Iron	-	33 Degree F	-	8"	Flanged Joint	Stainless Steel	£19,940.98	RFQ
E	LF909M1-DOSY 8	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	8"	Flanged Joint	Stainless Steel	£33,041.72	RFQ
E	LF909M1-OSY 8	LF909 Large	Cast Iron	Flanged Joint	33° F	Flanged Joint	8"	Flanged Joint	Stainless Steel	£33,041.72	RFQ
K	LF909M1-QT-HW 1 1/2	LF909 Small	Lead Free Bronze	Female Threaded	33° F	Female Threaded	1-1/2"	Female Threaded	Stainless Steel	£4,805.94	RFQ
L	LF909M1-QT-S-HW 2	LF909 Small	Lead Free Bronze	Male Threaded	33° F	Male Threaded	2"	Male Threaded	Stainless Steel	£6,042.71	RFQ
L	LF909M1-QT-S 2	LF909 Small	Lead Free Bronze	Female Threaded	33° F	Female Threaded	2"	Female Threaded	Engineered Plastic	£3,590.70	RFQ
K	LF909M1-QT-HW 2	LF909 Small	Lead Free Bronze	Female Threaded	33° F	Female Threaded	2"	Female Threaded	Stainless Steel	£5,209.26	RFQ
L	LF909M1-QT-S-HW 1 1/4	LF909 Small	Lead Free Bronze	Male Threaded	33° F	Male Threaded	1-1/4"	Male Threaded	Stainless Steel	£4,806.02	RFQ
M	LF909M1-QT 1 1/4	LF909 Small	Lead Free Bronze	Female Threaded	33° F	Female Threaded	1-1/4"	Female Threaded	Engineered Plastic	£2,589.32	RFQ
L	LF909M1-QT-S-HW 1 1/2	LF909 Small	Lead Free Bronze	Male Threaded	33° F	Male Threaded	1-1/2"	Male Threaded	Stainless Steel	£5,242.37	RFQ

WATTS -

LF757NDCDA Series Double Check Detector Assemblies

Style	Model	Outlet Size	Inlet Connection	Inlet Size	Outlet Type	Valve Type	Inlet Type	Max. Temp.	Max. Working Pressure	Price (inc. VAT)
A	LF757NDCDA-OSY-GPM 2 1/2	2-1/2"	-	2-1/2"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140 Degree F	12.1 Bar	£7,579.62	RFQ
B	LF757N-DCDA-DOSY-CFM 2 1/2	2-1/2"	Flanged Joint	2 1/2"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£8,563.55	RFQ
C	LF757NDCDA-BFG-CFM 2 1/2	2-1/2"	-	2-1/2"	Grooved Joint	Gear Operated Butterfly Valve	Grooved Joint	140 Degree F	12.1 Bar	£7,959.99	RFQ
C	LF757NDCDA-BFG-GPM 2 1/2	2-1/2"	-	2-1/2"	Grooved Joint	Gear Operated Butterfly Valve	Grooved Joint	140 Degree F	12.1 Bar	£7,959.99	RFQ
B	LF757N-DCDA-DOSY-GPM 2 1/2	2-1/2"	Flanged Joint	2 1/2"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£8,563.55	RFQ
C	LF757NDCDA-BFG-GPM 3	3"	-	3"	Grooved Joint	Gear Operated Butterfly Valve	Grooved Joint	140 Degree F	12.1 Bar	£8,360.05	RFQ
B	LF757N-DCDA-DOSY-CFM 3	3"	Flanged Joint	3"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£9,011.33	RFQ
A	LF757NDCDA-OSY-GPM 3	3"	-	3"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140 Degree F	12.1 Bar	£7,976.84	RFQ
B	LF757N-DCDA-DOSY-GPM 3	3"	Flanged Joint	3"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£9,011.33	RFQ
A	LF757NDCDA-OSY-GPMA 4	4"	-	4"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140 Degree F	12.1 Bar	£9,331.34	RFQ
A	LF757NDCDA-OSY-CFM 4	4"	-	4"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140 Degree F	12.1 Bar	£9,331.34	RFQ
B	LF757N-DCDA-DOSY-GPM 4	4"	Flanged Joint	4"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£10,544.07	RFQ
A	LF757NDCDA-OSY-GPM 4	4"	-	4"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140 Degree F	12.1 Bar	£9,331.34	RFQ
C	LF757NDCDA-BFG-CFM 4	4"	-	4"	Grooved Joint	Gear Operated Butterfly Valve	Grooved Joint	140 Degree F	12.1 Bar	£9,715.96	RFQ
B	LF757N-DCDA-DOSY-CFM 4	4"	Flanged Joint	4"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£10,544.07	RFQ
C	LF757NDCDA-BFG-CFM 6	6"	-	6"	Grooved Joint	Gear Operated Butterfly Valve	Grooved Joint	140 Degree F	12.1 Bar	£13,355.58	RFQ
A	LF757NDCDA-OSY-GPM 6	6"	-	6"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140 Degree F	12.1 Bar	£12,963.94	RFQ
C	LF757NDCDA-BFG-GPM 6	6"	-	6"	Grooved Joint	Gear Operated Butterfly Valve	Grooved Joint	140 Degree F	12.1 Bar	£13,355.58	RFQ
B	LF757N-DCDA-DOSY-CFM 6	6"	Flanged Joint	6"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£14,646.92	RFQ
B	LF757N-DCDA-DOSY-GPM 6	6"	Flanged Joint	6"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£14,646.92	RFQ
A	LF757NDCDA-OSY-CFM 6	6"	-	6"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140 Degree F	12.1 Bar	£12,963.94	RFQ
B	LF757N-DCDA-DOSY-GPM 8	8"	Flanged Joint	8"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£22,102.65	RFQ
B	LF757N-DCDA-DOSY-CFM 8	8"	Flanged Joint	8"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140° F	175 PSI	£22,102.65	RFQ
C	LF757NDCDA-BFG-CFM 8	8"	Grooved Joint	8"	Grooved Joint	Gear Operated Butterfly Valve	Grooved Joint	140° F	175 PSI	£22,494.96	RFQ
A	LF757NDCDA-OSY-CFM 8	8"	-	8"	Flanged Joint	Outside Stem And Yoke Gate Valve	Flanged Joint	140 Degree F	12.1 Bar	£22,102.65	RFQ

WATTS -

Reduced Pressure Zone Assemblies

Style	Model	Min. Temp.	Body Material	Inlet Size	Outlet Size	Outlet Type	Seat Material	Thread Type	Type	Price (inc. VAT)
A	909-QT-S 4	33° F	Cast Iron	4"	4"	Mechanical Joint	Bronze	FPT	Kit	£13,931.05	RFQ
B	919-LF 1	33 Degree F	Bronze	1"	1"	Female Threaded	Polymer	NPT	Valve to Accessory	£794.45	RFQ

WATTS -

LF719 Series Double Check Valve Assemblies

Style	Model	Inlet Size	Outlet Size	Thread Type	Valve Type	Price (inc. VAT)
A	LF719QTS 1	1"	1"	FPT	Quarter Turn Ball Valve	£788.15	RFQ
B	LF719-QT 1 1/2	1-1/2"	1-1/2"	FPT	No Shutoff Valve	£1,067.73	RFQ
C	LF719QTS 1 1/2	1-1/2"	1-1/2"	FPT	Quarter Turn Ball Valve	£1,416.27	RFQ
C	LF719-QT-S 1 1/4	1-1/4"	1-1/4"	FPT	Quarter Turn Ball Valve	£1,144.64	RFQ
B	LF719-QT 1 1/4	1-1/4"	1-1/4"	FPT	No Shutoff Valve	£849.91	RFQ
A	LF719-QT-S 1/2	1/2"	1/2"	FPT	Quarter Turn Ball Valve	£564.97	RFQ
B	LF719-QT 1/2	1/2"	1/2"	FPT	No Shutoff Valve	£393.54	RFQ
B	LF719-QT 2	2"	2"	FPT	No Shutoff Valve	£1,198.71	RFQ
C	LF719QTS 2	2"	2"	FPT	Quarter Turn Ball Valve	£1,687.14	RFQ
D	LF719QTS 3/4	3/4"	3/4"	NPT	Quarter Turn Ball Valve	£678.65	RFQ

WATTS -

909RPDA Series Reduced Pressure Detector Assemblies

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Type	Valve Type	Price (inc. VAT)
A	909RPDA-DOSY-GPM 2 1/2	2-1/2"	140 Degree F	12.1 Bar	33 Degree F	2-1/2"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£11,255.74	RFQ
A	909RPDA-OSY-GPM 2 1/2	2-1/2"	140 Degree F	12.1 Bar	33 Degree F	2-1/2"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£10,520.23	RFQ
A	D909RPDA-OSY-CFM 2 1/2	2-1/2"	140 Degree F	12.1 Bar	33 Degree F	2-1/2"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£11,255.74	RFQ
A	909RPDA-OSY-CFM 2 1/2	2-1/2"	140 Degree F	12.1 Bar	33 Degree F	2-1/2"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£10,520.23	RFQ
A	909RPDA-D0SY-CFM 3	3"	140 Degree F	12.1 Bar	33 Degree F	3"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£12,802.54	RFQ
A	909RPDA-DOSY-GPM 3	3"	140 Degree F	12.1 Bar	33 Degree F	3"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£12,802.54	RFQ
A	909RPDA-OSY-CFM 3	3"	140 Degree F	12.1 Bar	33 Degree F	3"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£11,963.16	RFQ
A	909RPDA-OSY-GPM 3	3"	140 Degree F	12.1 Bar	33 Degree F	3"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£11,963.16	RFQ
A	909RPDA-OSY-GPM 4	4"	140 Degree F	12.1 Bar	33 Degree F	4"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£14,954.32	RFQ
B	909RPDA-LF-CFM 4	4"	140 Degree F	12.1 Bar	33 Degree F	4"	Kit	No Shutoff Valve	£10,622.68	RFQ
A	909RPDA-D0SY-CFM 4	4"	140 Degree F	12.1 Bar	33 Degree F	4"	Kit	Outside Stem And Yoke Gate Valve	£14,954.32	RFQ
C	SR909RPDA-OSY-CFM 4	4"	140° F	175 PSI	33° F	4"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£16,802.84	RFQ
C	SR909RPDA-OSY-GPM 4	4"	140° F	175 PSI	33° F	4"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£16,802.84	RFQ
A	909RPDA-OSY-CFM 4	4"	140 Degree F	12.1 Bar	33 Degree F	4"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£14,954.32	RFQ
B	909RPDA-LF-GPM 4	4"	140 Degree F	12.1 Bar	33 Degree F	4"	Valve to Accessory	No Shutoff Valve	£10,622.68	RFQ
A	909RPDA-DOSY-GPM 4	4"	140 Degree F	12.1 Bar	33 Degree F	4"	Kit	Outside Stem And Yoke Gate Valve	£16,001.48	RFQ
A	909RPDA-OSY-GPM 6	6"	140 Degree F	12.1 Bar	33 Degree F	6"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£21,734.81	RFQ
A	909RPDA-OSY-CFM 6	6"	140 Degree F	12.1 Bar	33 Degree F	6"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£21,734.81	RFQ
B	909RPDA-LF-CFM 6	6"	140 Degree F	12.1 Bar	33 Degree F	6"	Kit	No Shutoff Valve	£15,437.16	RFQ
B	909RPDA-LF-GPM 6	6"	140 Degree F	12.1 Bar	33 Degree F	6"	Valve to Accessory	No Shutoff Valve	£15,437.16	RFQ
C	SR909RPDA-OSY-CFM 6	6"	140° F	175 PSI	33° F	6"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£24,418.00	RFQ
A	909RPDA-DOSY-GPM 6	6"	140 Degree F	12.1 Bar	33 Degree F	6"	Kit	Outside Stem And Yoke Gate Valve	£21,734.81	RFQ
C	SR909RPDA-OSY-GPM 6	6"	140° F	175 PSI	33° F	6"	Valve to Accessory	Outside Stem And Yoke Gate Valve	£24,418.00	RFQ
D	909RPDAM1-LF-GPM 8	8"	140° F	175 PSI	33° F	8"	Valve to Accessory	No Shutoff Valve	£25,815.05	RFQ
E	909RPDAM1-DOSY-GPM 8	8"	140 Degree F	12.1 Bar	33 Degree F	8"	Kit	Outside Stem And Yoke Gate Valve	£38,890.11	RFQ

WATTS -

994RPDA Series Reduced Pressure Detector Assemblies

Style	Model	Outlet Type	Inlet Connection	Inlet Size	Valve Type	Inlet Type	Max. Temp.	Max. Working Pressure	Min. Temp.	Price (inc. VAT)
A	994RPDA-LF-CFM 4	-	Flanged Joint	4"	No Shutoff Valve	Flanged Joint	110° F	175 PSI	33° F	£6,855.35	RFQ
A	994RPDA-LF-GPM 3	-	Grooved Joint	3"	No Shutoff Valve	Grooved Joint	110° F	175 PSI	33° F	£5,992.12	RFQ
A	994RPDA-LF-GPM 6	-	Grooved Joint	6"	No Shutoff Valve	Grooved Joint	110° F	175 PSI	33° F	£9,930.70	RFQ
A	994RPDA-LF-CFM 6	-	Flanged Joint	6"	No Shutoff Valve	Flanged Joint	110° F	175 PSI	33° F	£9,930.70	RFQ
A	994RPDA-LF-GPM 4	-	Grooved Joint	4"	No Shutoff Valve	Grooved Joint	110° F	175 PSI	33° F	£6,855.35	RFQ
A	994RPDA-LF-CFM 3	-	Flanged Joint	3"	No Shutoff Valve	Flanged Joint	110° F	175 PSI	33° F	£5,992.12	RFQ
A	994RPDA-LF-CFM 2 1/2	-	Swivel Joint	2 1/2"	No Shutoff Valve	Swivel Joint	110° F	175 PSI	33° F	£5,392.76	RFQ
B	994RPDA-LF-CFM 8	-	Flanged Joint	8"	No Shutoff Valve	Flanged Joint	110° F	175 PSI	33° F	£18,951.47	RFQ
A	994RPDA-LF-GPM 2 1/2	-	Grooved Joint	2 1/2"	No Shutoff Valve	Grooved Joint	110° F	175 PSI	33° F	£5,392.76	RFQ
A	994RPDA-OSY-CFM 2 1/2	Flanged Joint	Flanged Joint	2 1/2"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£6,835.69	RFQ
C	994RPDA-OSY-GXF-GPM 6	Flanged Joint	-	6"	Outside Stem And Yoke Gate Valve	Grooved Joint	110 Degree F	12.1 Bar	33 Degree F	£12,518.98	RFQ
B	994RPDA-DOSY-CFM 4	Flanged Joint	Flanged Joint	4"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£9,297.68	RFQ
C	994RPDA-OSY-GXF-CFM 4	Flanged Joint	-	4"	Outside Stem And Yoke Gate Valve	Grooved Joint	110 Degree F	12.1 Bar	33 Degree F	£8,689.88	RFQ
C	994RPDA-OSY-GXF-GPM 3	Flanged Joint	-	3"	Outside Stem And Yoke Gate Valve	Grooved Joint	110 Degree F	12.1 Bar	33 Degree F	£7,595.06	RFQ
D	994RPDA-OSY-CFM 8	Flanged Joint	Flanged Joint	8"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£22,025.36	RFQ
A	994RPDA-OSY-CFM 3	Flanged Joint	Flanged Joint	3"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£7,595.06	RFQ
B	994RPDA-DOSY-CFM 8	Flanged Joint	Flanged Joint	8"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£23,567.29	RFQ
A	994RPDA-OSY-GPM 3	Flanged Joint	Flanged Joint	3"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£7,595.06	RFQ
B	994RPDA-DOSY-CFM 6	Flanged Joint	Flanged Joint	6"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£13,396.28	RFQ
B	994RPDA-DOSY-CFM 3	Flanged Joint	Flanged Joint	3"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£8,125.63	RFQ
A	994RPDA-OSY-GPM 2 1/2	Flanged Joint	Flanged Joint	2 1/2"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£6,835.69	RFQ
A	994RPDA-OSY-CFM 6	Flanged Joint	Flanged Joint	6"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£12,518.98	RFQ
C	994RPDA-OSY-GXF-CFM 6	Flanged Joint	-	6"	Outside Stem And Yoke Gate Valve	Grooved Joint	110 Degree F	12.1 Bar	33 Degree F	£12,518.98	RFQ
B	994RPDA-DOSY-CFM 2 1/2	Flanged Joint	Flanged Joint	2 1/2"	Outside Stem And Yoke Gate Valve	Flanged Joint	110° F	175 PSI	33° F	£7,315.74	RFQ
C	994RPDA-OSY-GXF-CFM 3	Flanged Joint	-	3"	Outside Stem And Yoke Gate Valve	Grooved Joint	110 Degree F	12.1 Bar	33 Degree F	£7,595.06	RFQ

WATTS -

AMES Maxim Series M300N Double Check Detector Assemblies

Style	Model	Inlet Connection	Inlet Size	Outlet Connection	Price (inc. VAT)
A	M300N-DOSY-G 3	Flanged Joint	3"	Flanged Joint	£7,392.93	RFQ
A	M300N-DOSY-G 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£6,699.53	RFQ
A	M300N-OSY-GPM 10	Flanged Joint	10"	Flanged Joint	£26,687.00	RFQ
B	M300N-OSY-GPM 8	Flanged Joint	8"	Flanged Joint	£17,074.53	RFQ
A	M300N-OSY-GPM 3	Flanged Joint	3"	Flanged Joint	£6,540.93	RFQ
B	M300N-OSY-GPM 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£5,930.34	RFQ
B	M300N-OSY-CFM 3	Flanged Joint	3"	Flanged Joint	£6,540.93	RFQ
A	M300N-OSY-CFM 4	Flanged Joint	4"	Flanged Joint	£7,635.75	RFQ
B	M300N-DOSY-G 4	Flanged Joint	4"	Flanged Joint	£8,626.71	RFQ
A	M300N-DOSY-LM 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£6,559.18	RFQ
A	M300N-OSY-CFM 6	Flanged Joint	6"	Flanged Joint	£9,885.80	RFQ
A	M300N-OSY-GPM 6	Flanged Joint	6"	Flanged Joint	£9,885.80	RFQ
A	M300N-OSY-CFM 8	Flanged Joint	8"	Flanged Joint	£17,074.53	RFQ
A	M300N-OSY-GPM 4	Flanged Joint	4"	Flanged Joint	£7,635.75	RFQ
B	M300N-OSY-CFM 10	Flanged Joint	10"	Flanged Joint	£26,687.00	RFQ
A	M300N-OSY-CFM 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£5,930.34	RFQ
A	M300N-DOSY-LM 3	Flanged Joint	3"	Flanged Joint	£7,249.76	RFQ
A	M300N-DOSY-LM 4	Flanged Joint	4"	Flanged Joint	£8,484.96	RFQ
A	M300N-BFG-GPM 2 1/2	Grooved Joint	2 1/2"	Grooved Joint	£6,352.85	RFQ
A	M300N-BFG-CFM 2 1/2	Grooved Joint	2 1/2"	Grooved Joint	£6,352.85	RFQ
A	M300N-BFG-GPM 3	Grooved Joint	3"	Grooved Joint	£6,964.83	RFQ
A	M300N-BFG-GPM 6	Grooved Joint	6"	Grooved Joint	£10,319.52	RFQ
A	M300N-BFG-CFM 6	Grooved Joint	6"	Grooved Joint	£10,319.52	RFQ
A	M300N-BFG-GPM 4	Grooved Joint	4"	Grooved Joint	£8,056.86	RFQ
A	M300N-BFG-CFM 4	Grooved Joint	4"	Grooved Joint	£8,056.86	RFQ

WATTS -

Ames Maxim Series M400 Reduced Pressure Zone Assemblies

Style	Model	Inlet Size	Price (inc. VAT)
A	M400-DOSY 2 1/2	2 1/2"	£5,359.06	RFQ
A	M400-DOSY 3	3"	£6,030.02	RFQ
A	M400-DOSY 4	4"	£8,020.37	RFQ
A	M400-DOSY 6	6"	£12,530.22	RFQ
A	M400-DOSY 8	8"	£19,090.35	RFQ

WATTS -

709DCDA Series Double Check Detector Assemblies

Style	Model	Bypass Size	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Valve Type	Price (inc. VAT)
A	709DCDA-DOSY-GPM 4	-	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Outside Stem And Yoke Gate Valve	£10,033.17	RFQ
A	709DCDA-LF-GPM 6	-	6"	110 Degree F	12.1 Bar	33 Degree F	6"	No Shutoff Valve	£9,675.22	RFQ
A	709DCDA-DOSY-GPM 3	-	3"	110 Degree F	12.1 Bar	33 Degree F	3"	Outside Stem And Yoke Gate Valve	£9,456.28	RFQ
A	709DCDA-DOSY-CFM3/4 4	-	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Outside Stem And Yoke Gate Valve	£10,033.17	RFQ
A	709DCDA-DOSY-CFM3/4 3	-	3"	110 Degree F	12.1 Bar	33 Degree F	3"	Outside Stem And Yoke Gate Valve	£9,456.28	RFQ
A	709DCDA-DOSY-CFM3/4 6	-	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Outside Stem And Yoke Gate Valve	£14,719.90	RFQ
A	709DCDA-DOSY-GPM3/4 4	-	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Outside Stem And Yoke Gate Valve	£9,376.26	RFQ
A	709DCDA-DOSY-GPM3/4 6	-	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Outside Stem And Yoke Gate Valve	£13,757.01	RFQ
A	709DCDA-DOSY-CFM 4	-	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Outside Stem And Yoke Gate Valve	£9,376.26	RFQ
A	709DCDA-DOSY-GPM 6	-	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Outside Stem And Yoke Gate Valve	£14,719.90	RFQ
A	709DCDA-DOSY-CFM 6	-	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Outside Stem And Yoke Gate Valve	£14,719.90	RFQ
A	709DCDA-DOSY-CFM 3	-	3"	110 Degree F	12.1 Bar	33 Degree F	3"	Outside Stem And Yoke Gate Valve	£9,456.28	RFQ
A	709DCDA-OSY-CFM 10	-	10"	110 Degree F	12.1 Bar	33 Degree F	10"	Outside Stem And Yoke Gate Valve	£34,689.07	RFQ
A	709DCDA-OSY-GPM 6	-	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Outside Stem And Yoke Gate Valve	£13,757.01	RFQ
A	709DCDA-OSY-CFM 4	-	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Outside Stem And Yoke Gate Valve	£9,376.26	RFQ
A	709DCDA-OSY-CFM 3	-	3"	110 Degree F	12.1 Bar	33 Degree F	3"	Outside Stem And Yoke Gate Valve	£8,837.29	RFQ
A	709DCDA-DOSY 10 3/4GPM	-	10"	110 Degree F	12.1 Bar	33 Degree F	10"	Outside Stem And Yoke Gate Valve	£34,689.07	RFQ
A	709DCDA-OSY-GPM 8	-	8"	110 Degree F	12.1 Bar	33 Degree F	8"	Outside Stem And Yoke Gate Valve	£26,862.42	RFQ
A	709DCDA-DOSY-GPM 10	-	10"	110 Degree F	12.1 Bar	33 Degree F	10"	Outside Stem And Yoke Gate Valve	£34,689.07	RFQ
A	709DCDA-DOSY 10 3/4CFM	-	10"	110 Degree F	12.1 Bar	33 Degree F	10"	Outside Stem And Yoke Gate Valve	£37,117.59	RFQ
A	709DCDA-OSY-GPM 10	-	10"	110 Degree F	12.1 Bar	33 Degree F	10"	Outside Stem And Yoke Gate Valve	£34,689.07	RFQ
A	709DCDA-OSY-CFM 8	-	8"	110 Degree F	12.1 Bar	33 Degree F	8"	Outside Stem And Yoke Gate Valve	£26,862.42	RFQ
A	709DCDA-OSY-CFM 6	-	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Outside Stem And Yoke Gate Valve	£13,757.01	RFQ
A	709DCDA-LF-GPM 10	-	10"	110 Degree F	12.1 Bar	33 Degree F	10"	No Shutoff Valve	£26,607.76	RFQ
A	709DCDA-OSY-CFM 8 3/4	-	8"	110 Degree F	12.1 Bar	33 Degree F	8"	Outside Stem And Yoke Gate Valve	£26,862.42	RFQ

WATTS -

Ames Maxim Series M400N Reduced Pressure Zone Assemblies

Style	Model	Inlet Size	Price (inc. VAT)
A	M400N-DOSY 2 1/2	2 1/2"	£6,121.24	RFQ
A	M400N-DOSY 3	3"	£6,935.37	RFQ
A	M400N-DOSY 4	4"	£9,106.79	RFQ
A	M400N-DOSY 6	6"	£13,925.43	RFQ
A	M400N-DOSY 8	8"	£20,297.28	RFQ

WATTS -

3000SE Series Double Check Detector Backflow Preventer Assemblies

Style	Model	Inlet Connection	Price (inc. VAT)
A	3000SE-OSY-LM 2 1/2	Flanged Joint	£8,135.45	RFQ
A	3000SE-OSY-GPM 2 1/2	Flanged Joint	£8,285.64	RFQ
A	3000SE-LG-LM 2 1/2	Flanged Joint	£6,124.07	RFQ
A	3000SE-LG-GPM 2 1/2	Grooved Joint	£6,272.85	RFQ

WATTS -

200B Series Double Check Valve Assemblies

Style	Model	Inlet Size	Price (inc. VAT)
A	200B 1	1"	£467.42	RFQ
A	200B 2	2"	£970.60	RFQ
B	200B 3/4	3/4"	£413.36	RFQ

WATTS -

Double Check Valve Backflow Preventer Assemblies

Style	Model	Body Material	Disc Material	Inlet Size	Item	Max. Temp.	Min. Temp.	Seat Material	Price (inc. VAT)
A	200-LBV 2	Bronze	Silicone	2"	Double Check Valve Assembly	180° F	33° F	Rubber	£830.27	RFQ
B	870V-4-DC-LG-DIN-N&V	Ductile Iron	EPDM	4"	Reduced Press. Zone Assembly	140° F	32° F	Stainless Steel	£3,113.26	RFQ
B	C200N-DOSY 8	Stainless Steel	-	8"	Double Check Valve Assembly	140° F	33° F	Rubber	£12,841.85	RFQ

WATTS -

Ames Colt Series LFC500Z Reduced Pressure Detector Assemblies

Style	Model	Inlet Size	Max. Temp.	Price (inc. VAT)
A	LFC500Z-DOSY-G 2 1/2	2 1/2"	110° F	£6,489.00	RFQ
A	LFC500Z-DOSY-C 2 1/2	2 1/2"	110° F	£6,489.00	RFQ
A	LFC500Z-OSY-CFM 2 1/2	2 1/2"	110° F	£5,743.67	RFQ
A	LFC500Z-OSY-GPM 2 1/2	2 1/2"	110° F	£5,743.67	RFQ
A	LFC500Z-DOSY-C 3	3"	110° F	£7,217.47	RFQ
A	LFC500Z-OSY-GPM 3	3"	110° F	£6,390.73	RFQ
A	LFC500Z-OSY-CFM 3	3"	110° F	£6,390.73	RFQ
A	LFC500Z-DOSY-G 3	3"	110° F	£7,217.47	RFQ
A	LFC500Z-DOSY-C 4	4"	110° F	£8,477.93	RFQ
A	LFC500Z-OSY-CFM 4	4"	110° F	£7,502.43	RFQ
A	LFC500Z-DOSY-G 4	4"	110° F	£8,477.93	RFQ
A	LFC500Z-DOSY-C 6	6"	140° F	£12,563.92	RFQ
A	LFC500Z-OSY-CFM 6	6"	110° F	£11,122.39	RFQ
A	LFC500Z-DOSY-C 8	8"	140° F	£19,332.32	RFQ
A	LFC500Z-OSY-CFM 8	8"	110° F	£19,332.32	RFQ

WATTS -

AMES Maxim Series LFM300N Double Check Detector Assemblies

Style	Model	Inlet Connection	Inlet Size	Outlet Connection	Price (inc. VAT)
A	LFM300N-OSY-CFM 3	Flanged Joint	3"	Flanged Joint	£6,933.95	RFQ
A	LFM300N-OSY-CFM 6	Flanged Joint	6"	Flanged Joint	£10,479.53	RFQ
A	LFM300N-DOSY-G 4	Flanged Joint	4"	Flanged Joint	£9,144.67	RFQ
B	LFM300N-DOSY-C 4	Flanged Joint	4"	Flanged Joint	£9,144.67	RFQ
A	LFM300N-DOSY-G 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£7,103.79	RFQ
A	LFM300N-DOSY-C 3	Flanged Joint	3"	Flanged Joint	£7,836.49	RFQ
B	LFM300N-OSY-GPM 6	Flanged Joint	6"	Flanged Joint	£10,479.53	RFQ
B	LFM300N-OSY-GPM 4	Flanged Joint	4"	Flanged Joint	£8,096.15	RFQ
A	LFM300N-OSY-GPM 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£6,288.29	RFQ
B	LFM300N-OSY-CFM 8	Flanged Joint	8"	Flanged Joint	£18,099.63	RFQ
B	LFM300N-OSY-CFM 4	Flanged Joint	4"	Flanged Joint	£8,096.15	RFQ
B	LFM300N-OSY-CFM 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£6,288.29	RFQ
A	LFM300N-DOSY-C 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£7,103.79	RFQ
A	LFM300N-DOSY-G 3	Flanged Joint	3"	Flanged Joint	£7,836.49	RFQ
B	LFM300N-OSY-GPM 8	Flanged Joint	8"	Flanged Joint	£18,099.63	RFQ
A	LFM300N-OSY-GPM 10	Flanged Joint	10"	Flanged Joint	£28,287.64	RFQ
A	LFM300N-OSY-GPM 3	Flanged Joint	3"	Flanged Joint	£6,933.95	RFQ
B	LFM300N-OSY-CFM 10	Flanged Joint	10"	Flanged Joint	£28,287.64	RFQ
B	LFM300N-BFG-CFM 4	Grooved Joint	4"	Grooved Joint	£8,541.10	RFQ
B	LFM300N-BFG-CFM 6	Grooved Joint	6"	Grooved Joint	£10,939.92	RFQ
B	LFM300N-BFG-CFM 3	Grooved Joint	3"	Grooved Joint	£7,385.94	RFQ
B	LFM300N-BFG-GPM 6	Grooved Joint	6"	Grooved Joint	£10,939.92	RFQ
B	LFM300N-BFG-GPM 3	Grooved Joint	3"	Grooved Joint	£7,385.94	RFQ
B	LFM300N-BFG-CFM 2 1/2	Grooved Joint	2 1/2"	Grooved Joint	£6,734.65	RFQ
B	LFM300N-BFG-GPM 4	Grooved Joint	4"	Grooved Joint	£8,541.10	RFQ

WATTS -

AMES 2000B Series Double Check Valve Assemblies

Style	Model	Inlet Size	Price (inc. VAT)
A	D2000B 1	1"	£341.79	RFQ
A	D2000BM3 3/4	3/4"	£371.25	RFQ

WATTS -

AMES Maxim Series M200 Double Check Valve Assemblies

Style	Model	Inlet Connection	Inlet Size	Outlet Connection	Price (inc. VAT)
A	M200-NRS 3	Flanged Joint	3"	-	£4,379.33	RFQ
A	M200-OSY 3	Flanged Joint	3"	Flanged Joint	£4,407.42	RFQ
A	M200-NRS 6	Flanged Joint	6"	-	£7,915.09	RFQ
A	M200-OSY 10	Flanged Joint	10"	Flanged Joint	£27,020.58	RFQ
A	M200-OSY 8	Flanged Joint	8"	Flanged Joint	£15,773.11	RFQ
A	M200-OSY 6	Flanged Joint	6"	Flanged Joint	£8,181.76	RFQ
A	M200-OSY 4	Flanged Joint	4"	Flanged Joint	£5,206.07	RFQ
A	M200-OSY 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£4,198.26	RFQ
A	M200-NRS 4	Flanged Joint	4"	-	£4,923.93	RFQ
A	M200-DOSY 8	Flanged Joint	8"	Flanged Joint	£15,773.11	RFQ
A	M200-NRS 8	Flanged Joint	8"	-	£15,604.19	RFQ
A	M200-NRS 10	Flanged Joint	10"	-	£21,744.75	RFQ
B	M200-BFG 4	Grooved Joint	4"	Grooved Joint	£6,292.49	RFQ
B	M200-BFG 3	Grooved Joint	3"	Grooved Joint	£5,409.61	RFQ
B	M200-BFG 6	Grooved Joint	6"	Grooved Joint	£9,614.89	RFQ
B	M200-BFG 2 1/2	Grooved Joint	2 1/2"	Grooved Joint	£5,176.61	RFQ
A	M200-NRS 2 1/2	Swivel Joint	2 1/2"	-	£4,041.05	RFQ

WATTS -

AMES Colt Series C300 Double Check Detector Backflow Preventer Assemblies

Style	Model	Inlet Connection	Inlet Size	Outlet Connection	Price (inc. VAT)
A	C300-OSYXPIV-CFM 4	Flanged Joint	4"	Flanged Joint	£6,017.37	RFQ
B	C300-DOSY-C 8	Flanged Joint	8"	Flanged Joint	£12,500.76	RFQ
C	C300-NRS-LM 3	Flanged Joint	3"	Flanged Joint	£4,567.44	RFQ
C	C300-NRS-LM 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	£4,140.71	RFQ
C	C300-DOSY-LM 8	Flanged Joint	8"	Flanged Joint	£12,396.89	RFQ
C	C300-DOSY-G 8	Flanged Joint	8"	Flanged Joint	£12,500.76	RFQ
D	C300-PIVXBFG-GPM 4	Flanged Joint	4"	Grooved Joint	£12,913.42	RFQ
D	C300-OSY-GPM 10	Flanged Joint	10"	Flanged Joint	£18,368.77	RFQ
E	C300-OSYXPIV-GPM 6	Flanged Joint	6"	Flanged Joint	£7,625.93	RFQ
F	C300-OSYXPIV-GPM 4	Flanged Joint	4"	Flanged Joint	£6,017.37	RFQ
F	C300-OSYXPIV-GPM 3	Flanged Joint	3"	Flanged Joint	£5,194.84	RFQ
F	C300-OSYXPIV-CFM 8	Flanged Joint	8"	Flanged Joint	£13,126.78	RFQ
E	C300-OSYXPIV-CFM 6	Flanged Joint	6"	Flanged Joint	£7,625.93	RFQ
E	C300-OSYXPIV-GPM 8	Flanged Joint	8"	Flanged Joint	£13,126.78	RFQ
A	C300-OSYXPIV-CFM 3	Flanged Joint	3"	Flanged Joint	£5,194.84	RFQ
C	C300-NRS-LM 4	Flanged Joint	4"	Flanged Joint	£5,329.60	RFQ
D	C300-PIVXBFG-GPM 8	Flanged Joint	8"	Grooved Joint	£27,316.93	RFQ
D	C300-PIVXBFG-GPM 6	Flanged Joint	6"	Grooved Joint	£16,191.16	RFQ
D	C300-PIVXBFG-GPM 3	Flanged Joint	3"	Grooved Joint	£11,254.32	RFQ
D	C300-PIVXBFG-CFM 8	Flanged Joint	8"	Grooved Joint	£27,316.93	RFQ
D	C300-PIVXBFG-CFM 6	Flanged Joint	6"	Grooved Joint	£16,191.16	RFQ
D	C300-PIVXBFG-CFM 4	Flanged Joint	4"	Grooved Joint	£12,913.42	RFQ
D	C300-PIVXBFG-CFM 3	Flanged Joint	3"	Grooved Joint	£11,254.32	RFQ
D	C300-BFGXPIV-GPM 3	Grooved Joint	3"	Flanged Joint	£11,254.32	RFQ
G	C300-BFG-CFM 3	Grooved Joint	3"	Grooved Joint	£5,301.53	RFQ

12...4 5

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WATTS Backflow Preventers

Designed to prevent potable water contamination from the reverse flow of polluted water. Capable of bearing up to 180 psi pressures and have a maximum operating temperature of 180 degrees F

Double Check Backflow Preventers

AMES Maxim Series M300 Double Check Detector Assemblies

LF957RPDA Series Reduced Pressure Zone Assemblies

LF909 Large Series Reduced Pressure Zone Assemblies

LF757NDCDA Series Double Check Detector Assemblies

Reduced Pressure Zone Assemblies

LF719 Series Double Check Valve Assemblies

909RPDA Series Reduced Pressure Detector Assemblies

994RPDA Series Reduced Pressure Detector Assemblies

AMES Maxim Series M300N Double Check Detector Assemblies

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WATTS Backflow Preventers Designed to prevent potable water contamination from the reverse flow of polluted water. Capable of bearing up to 180 psi pressures and have a maximum operating temperature of 180 degrees F

Frequently Asked Questions

How does backflow occur?

Can check valves prevent backflow?

Are dual check valves the same as backflow preventers?

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WATTS Backflow Preventers

Designed to prevent potable water contamination from the reverse flow of polluted water. Capable of bearing up to 180 psi pressures and have a maximum operating temperature of 180 degrees F