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 -

Backflow Preventer Accessories

WATTS RK-TC-P Plastci Cap Tether 1/8 1/4 NPT

Style	Model	Connection Type	Item	Length	Material	Max. Pressure	Size	Width	Price (inc. GST)
A	1/4 LFTC	MNPT	Test Cock	1.75"	Copper Silicon Alloy	175 psi	1/4"	1"	SGD 166.49
B	4 909 AGK	Npt	Air Gap	9.625"	Cast Iron	140 psi	4" to 6"	6.38"	SGD 749.50
C	909 AGK 4-6 8-10 M1	Npt	Air Gap	9.625"	Cast Iron	175 psi	3"	6.38"	SGD 934.56
D	909 AGM 8-10 909	Npt	Air Gap	11.25"	Cast Iron	175 psi	4mm	7.38"	SGD 1171.41
E	RK-TC-P Plastci Cap Tether 1/8 1/4 NPT	Npt	Cap Tether	-	Plastic	-	1/8" to 1/4"	-	SGD 6.98
F	1/4 LF-TC	Npt	Test Cock	-	Bronze	-	1/4"	-	SGD 139.82
G	LFTC 2 1/2-4	Npt	Test Cock	1.625"	Bronze	175 psi	1/2"	1"	SGD 262.63
G	LFTC 6-10	Npt	Test Cock	-	Bronze	-	3/4"	-	SGD 247.39
H	1/8 LF-NPT-TC	Npt	Test Cock	-	Bronze	-	1/8"	-	SGD 108.17
I	RK-SAE-TC 1/8 SAE	SAE	Test Cock	11.25"	Bronze	-	1/8"	7.38"	SGD 21.19
J	SAE-TC Brass Cap 1/8 SAE	SAE	Cap	-	Brass	-	1/8"	-	SGD 8.96
K	SAE-TC Plastic Cap 1/8 SAE	SAE	Cap	-	Brass	-	1/8"	-	SGD 9.01
L	SAE-TC-Adapter 1/4	SAE	Adapter	-	Bronze	-	1/4"	-	SGD 138.13

WATTS -

880V Series Reduced Pressure Zone Backflow Preventer Assemblies

Style	Model	Price (inc. GST)
A	880V-LG RP 10	SGD 27811.12	RFQ
B	880V-DNRS RP 6	SGD 13622.00	RFQ
B	880V-NRS RP 10	SGD 33154.68	RFQ
B	880V-DNRS RP 10	SGD 33154.68	RFQ
C	880V-DOSY RP 6	SGD 14178.25	RFQ
D	880V-OSY RP 10	SGD 34838.22	RFQ
C	880V-DOSY RP 10	SGD 34838.22	RFQ

WATTS -

LF4000B Series Reduced Pressure Zone Backflow Preventer Assemblies

Style	Model	Inlet Size	Price (inc. GST)
A	LF4000BM2 1 1/2	1 1/2"	SGD 2508.46	RFQ
B	LF4000BM2-LBV 1 1/2	1 1/2"	SGD 2012.23	RFQ
C	LF4000BM2 1 1/4	1 1/4"	SGD 2320.86	RFQ
D	LF4000BM2 1	1"	SGD 1480.01	RFQ
E	LF4000B 1/2	1/2"	SGD 942.33	RFQ
F	LF4000BM2-LBV 2	2"	SGD 2318.36	RFQ
G	LF4000BM2 2	2"	SGD 2885.81	RFQ
H	LF4000BM2 3/4	3/4"	SGD 1255.33	RFQ

WATTS -

RK-LF007DCDA Series Backflow Preventer Repair Kit

Style	Model	Item	Price (inc. GST)
A	LFRK 007DCDA-CK2 2 1/2-3	Repair Kit	SGD 1188.71	RFQ
B	LFRK 007DCDA-CK1 2 1/2-3	Single Check Kit	SGD 1295.91	RFQ

WATTS -

400B Series Reduced Pressure Zone Backflow Preventer Assemblies

Style	Model	Price (inc. GST)
A	400B 1 1/2	SGD 1964.25	RFQ
B	400B 3/4	SGD 1015.39	RFQ

WATTS -

LFM500 Series Reduced Pressure Detector Backflow Preventer Assemblies

Style	Model	Body Pattern	Inlet Connection	Inlet Size	Outlet Connection	Price (inc. GST)
A	LFM500N-OSY-G 4	-	-	-	-	SGD 15735.65	RFQ
A	LFM500Z-BFG-G 4	-	-	-	-	SGD 16516.54	RFQ
A	LFM500Z-OSY-G 4	-	-	-	-	SGD 15735.65	RFQ
A	LFM500N-BFG-G 4	-	-	-	-	SGD 16516.54	RFQ
A	LFM500Z-BFG-C 4	-	-	-	-	SGD 16516.54	RFQ
B	LFM500N-OSY-CFM 8	N Pattern	Flanged Joint	8"	Flanged Joint	SGD 38633.03	RFQ
C	LFM500N-OSY-GPM 8	N Pattern	Flanged Joint	8"	Flanged Joint	SGD 38633.03	RFQ
D	LFM500N-BFG-CFM 6	N Pattern	Grooved Joint	6"	Grooved Joint	SGD 24124.82	RFQ
E	LFM500N-BFG-GPM 6	N Pattern	Grooved Joint	6"	Grooved Joint	SGD 24124.82	RFQ
F	LFM500Z-OSY-GPM 3	N Pattern	Flanged Joint	3"	Flanged Joint	SGD 13399.52	RFQ
G	LFM500N-BFG-GPM 2 1/2	N Pattern	Grooved Joint	2 1/2"	Grooved Joint	SGD 12823.68	RFQ
H	LFM500N-BFG-CFM 2 1/2	N Pattern	Grooved Joint	2 1/2"	Grooved Joint	SGD 12823.68	RFQ
I	LFM500N-OSY-CFM 6	N Pattern	Flanged Joint	6"	Flanged Joint	SGD 23326.49	RFQ
J	LFM500N-BFG-CFM 3	N Pattern	Grooved Joint	3"	Grooved Joint	SGD 14176.08	RFQ
K	LFM500N-OSY-CFM 2 1/2	N Pattern	Flanged Joint	2 1/2"	Flanged Joint	SGD 12042.78	RFQ
L	LFM500N-BFG-GPM 3	N Pattern	Grooved Joint	3"	Grooved Joint	SGD 14176.08	RFQ
M	LFM500N-OSY-GPM 6	N Pattern	Flanged Joint	6"	Flanged Joint	SGD 23326.49	RFQ
N	LFM500-OSY-CFM 2 1/2	Straight	Flanged Joint	2 1/2"	Flanged Joint	SGD 11065.59	RFQ
O	LFM500-OSY-CFM 3	Straight	Flanged Joint	3"	Flanged Joint	SGD 12228.18	RFQ
P	LFM500-DOSY-G 6	Straight	Flanged Joint	6"	Flanged Joint	SGD 23926.33	RFQ
Q	LFM500-OSY-GPM 8	Straight	Flanged Joint	8"	Flanged Joint	SGD 36563.90	RFQ
R	LFM500-OSY-GPM 10	Straight	Flanged Joint	10"	Flanged Joint	SGD 52158.17	RFQ
S	LFM500-OSY-GPM 2 1/2	Straight	Flanged Joint	2 1/2"	Flanged Joint	SGD 11065.59	RFQ
T	LFM500-OSY-GPM 6	Straight	Flanged Joint	6"	Flanged Joint	SGD 21171.40	RFQ
U	LFM500-OSY-GPM 3	Straight	Flanged Joint	3"	Flanged Joint	SGD 12228.18	RFQ

WATTS -

SS007 Series Double Check Valve Backflow Preventer Assemblies

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Price (inc. GST)
A	SS007M1-QT-S 1	1"	180° F	175 PSI	33° F	1"	SGD 3941.53	RFQ
B	SS007M1-QT 1	1"	180° F	175 PSI	33° F	1"	SGD 3455.12	RFQ
B	SS007M3-QT 1/2	1/2"	180° F	175 PSI	33° F	1/2"	SGD 2471.37	RFQ
C	SS007M3-QT-S 1/2	1/2"	180° F	175 PSI	33° F	1/2"	SGD 2774.59	RFQ
B	SS007M3-QT 3/4	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	SGD 2584.80	RFQ
D	SS007M3-QT-S 3/4	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	SGD 2964.35	RFQ

WATTS -

007M1DCDA Series Double Check Detector Bvackflow Preventer Assemblies

Style	Model	Inlet Connection	Inlet Type	Item	Valve Type	Price (inc. GST)
A	007M1DCDA-OSY-GPM	-	-	Backflow Preventer	-	SGD 10958.05
B	007M1DCDA-FP-CFM 2	-	-	-	-	SGD 6591.77	RFQ
C	007M1DCDA-OSY-CFM	-	-	Backflow Preventer	-	SGD 10958.05
D	007M1DCDA-OSY-CFM 2	Flanged Joint	Flanged Joint	Double Check Valve Assembly	Outside Stem And Yoke Gate Valve	SGD 10801.66	RFQ
E	007M1DCDA-LF-CFM 2	Flanged Joint	Flanged Joint	Double Check Valve Assembly	No Shutoff Valve	SGD 8615.98	RFQ
D	007M1DCDA-OSY-GPM 2	Grooved Joint	Grooved Joint	Double Check Valve Assembly	Outside Stem And Yoke Gate Valve	SGD 10801.66	RFQ
F	007M1DCDA-LF-GPM 2	Grooved Joint	Grooved Joint	Double Check Valve Assembly	No Shutoff Valve	SGD 8615.98	RFQ

WATTS -

SS009 Series Reduced Pressure Zone Backflow Preventer Assemblies

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Seat Material	Type	Price (inc. GST)
A	SS009-QT 1	1"	180° F	175 PSI	33° F	1"	Stainless Steel	Kit	SGD 5669.10	RFQ
B	SS009-QT-S 1	1"	180° F	175 PSI	33° F	1"	Stainless Steel	Kit	SGD 7571.19	RFQ
C	SS009M3-QT-S 1/2	1/2"	180° F	175 PSI	33° F	1/2"	Stainless Steel	Kit	SGD 5485.90	RFQ
D	SS009M3-QT 1/2	1/2"	180° F	175 PSI	33° F	1/2"	Engineered Plastic	Kit	SGD 5008.22	RFQ
E	SS009M3-QT 3/4	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	Engineered Plastic	Valve to Accessory	SGD 5361.58	RFQ
F	SS009M3-QT-S 3/4	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	Stainless Steel	Valve to Accessory	SGD 5991.94	RFQ

WATTS -

009 Series Reduced Pressure Zone Backflow Preventer Assemblies

Style	Model	Inlet Size	Item	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Seat Material	Type	Price (inc. GST)
A	009M2QTS-3/4"	-	Reduced Press. Zone Assembly	180 Degrees F	-	-	-	-	-	SGD 902.06
B	D009M2-QT-S 2	-	-	-	-	-	-	-	-	SGD 2846.56	RFQ
C	D009M2-QT-S 1	-	-	-	-	-	-	-	-	SGD 1417.85	RFQ
D	009M3-QT-SH	-	Backflow Preventer	-	-	-	-	-	-	SGD 1190.96
E	009-QT-SH	-	Backflow Preventer	-	-	-	-	-	-	SGD 1012.42
F	D009M3-QT 3/4	-	-	-	-	-	-	-	-	SGD 1020.84	RFQ
G	009-QT 3/4	-	-	-	-	-	-	-	-	SGD 1495.27	RFQ
H	009-NRS 3	-	-	-	-	-	-	-	-	SGD 6707.76	RFQ
I	009M2-LF 1 1/2	1 1/2"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1-1/2"	Stainless Steel	Kit	SGD 1960.97	RFQ
J	009M2-QT-S 1 1/2	1 1/2"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1-1/2"	Engineered Plastic	Kit	SGD 1496.60	RFQ
K	009M2-PC-QT 1 1/4	1 1/4"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1-1/4"	Stainless Steel	Kit	SGD 2039.47	RFQ
K	009M2-QT-SH 1 1/4	1 1/4"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1-1/4"	Stainless Steel	Kit	SGD 1895.53	RFQ
B	009M2-QT-S 1 1/4	1 1/4"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1-1/4"	Engineered Plastic	Kit	SGD 1261.02	RFQ
B	D009M2-QT-S 1 1/4	1 1/4"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1-1/4"	Stainless Steel	Valve to Accessory	SGD 2175.80	RFQ
K	D009M2-QT 1 1/4	1 1/4"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1-1/4"	Stainless Steel	Valve to Accessory	SGD 1887.88	RFQ
K	009M2-QT 1	1"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1"	Engineered Plastic	Kit	SGD 759.51	RFQ
L	009M2-QT-S 1	1"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1"	Engineered Plastic	Kit	SGD 783.16	RFQ
K	009M2-QT-SH 1	1"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1"	Stainless Steel	Kit	SGD 1194.22	RFQ
K	009M2-QT 1 1/2	1-1/2"	Reduced Press. Zone Assembly	180 Degree F	12.1 Bar	33 Degree F	1-1/2"	Engineered Plastic	Valve to Accessory	SGD 1505.61	RFQ
G	D009-QT 1/2	1/2"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1/2"	Stainless Steel	Kit	SGD 767.83	RFQ
M	D009-QT-S 1/2	1/2"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1/2"	Stainless Steel	Valve to Accessory	SGD 877.97	RFQ
M	009-QT-S 1/2	1/2"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1-1/2"	Engineered Plastic	Kit	SGD 665.80	RFQ
G	009-QT 1/2	1/2"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1-1/2"	Engineered Plastic	Kit	SGD 664.93	RFQ
N	009-QT-SH 1/2	1/2"	Reduced Press. Zone Assembly	180° F	175 PSI	33° F	1/2"	Stainless Steel	Kit	SGD 774.36	RFQ
O	009-QT-S 1/4	1/4"	Reduced Press. Zone Assembly	180 Degree F	12.1 Bar	33 Degree F	1-1/4"	Stainless Steel	Valve to Accessory	SGD 647.82	RFQ

WATTS -

C300 Series Double Check Detector Backflow Preventer Assemblies

Style	Model	Body Pattern	Inlet Connection	Inlet Size	Outlet Connection	Price (inc. GST)
A	C300-OSY-CFM 3	-	-	-	-	SGD 7691.17	RFQ
B	C300-OSY-FXG-CFM 3	-	-	-	-	SGD 7691.17	RFQ
B	C300-OSY-FXG-GPM 4	-	-	-	-	SGD 8908.30	RFQ
C	C300N-OSY-LM 3	-	-	-	-	SGD 8057.60	RFQ
B	C300-OSY-FXG-CFM 10	-	-	-	-	SGD 28545.36	RFQ
D	C300-NRS-LM 8	-	-	-	-	SGD 19485.29	RFQ
B	C300-OSY-FXG-CFM 8	-	-	-	-	SGD 19426.38	RFQ
E	C300-OSY-LM 3	-	-	-	-	SGD 7527.54	RFQ
B	C300-OSY-FXG-CFM 6	-	-	-	-	SGD 11288.07	RFQ
E	C300-OSY-LM 10	-	-	-	-	SGD 28380.74	RFQ
D	C300-NRS-LM 6	-	-	-	-	SGD 10659.85	RFQ
A	C300-OSY-CFM 2 1/2	-	-	-	-	SGD 6971.32	RFQ
F	C300-NRS-GPM 8	-	-	-	-	SGD 19646.69	RFQ
F	C300-NRS-GPM 4	-	-	-	-	SGD 8441.48	RFQ
F	C300-NRS-CFM 8	-	-	-	-	SGD 19646.69	RFQ
F	C300-NRS-CFM 6	-	-	-	-	SGD 10823.46	RFQ
F	C300-NRS-CFM 3	-	-	-	-	SGD 7261.44	RFQ
F	C300-NRS-CFM 2 1/2	-	-	-	-	SGD 6593.97	RFQ
G	C300N-BFG-GPM 8	-	-	-	-	SGD 22065.68	RFQ
H	C300-BFG-GPM 8	-	-	-	-	SGD 19986.96	RFQ
E	C300-OSY-LM 6	-	-	-	-	SGD 11124.50	RFQ
C	C300N-OSY-LM 6	-	-	-	-	SGD 12267.46	RFQ
I	C300-BFG-CFM 8	-	-	-	-	SGD 19986.96	RFQ
J	C300N-BFG-LM 3	-	-	-	-	SGD 8631.24	RFQ
K	C300N-DOSY-C 8	-	-	-	-	SGD 21476.78	RFQ

WATTS -

LFCu7 Series Dual Check Valve Backflow Preventers

Style	Model	Price (inc. GST)
A	LFCU7-U2-U2 1/2X1/2	SGD 191.37	RFQ
B	LFCU7-U2-U2 1X1	SGD 302.10	RFQ

WATTS -

LF8 Series Vacuum Breakers

Style	Model	Body Material	Item	Price (inc. GST)
A	LF8BI 3/4	-	Vacuum Breaker	SGD 27.79
B	LF8B 3/4	Lead Free Brass	Hose Connection Vacuum Breaker	SGD 28.02
C	LF8C 3/4	Lead Free Brass	Hose Connection Vacuum Breaker	SGD 125.40
D	LF8BC 3/4	Lead Free Brass	Hose Connection Vacuum Breaker	SGD 122.68
E	LFNF8 3/4	Lead Free Brass	Hose Connection Vacuum Breaker	SGD 105.93
F	LF8FR 3/4	Lead Free Brass	Hose Connection Vacuum Breaker	SGD 76.59
G	LF8 3/4	Lead Free Brass	Hose Connection Vacuum Breaker	SGD 81.32
H	LF8AC 3/4	Lead Free Copper Silicon Alloy	Hose Connection Vacuum Breaker	SGD 167.97
I	LF8A 3/4	Lead Free Copper Silicon Alloy	Hose Connection Vacuum Breaker	SGD 103.83

WATTS -

LF709 Series Double Check Valve Backflow Preventer Assemblies

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Valve Type	Price (inc. GST)
A	LF709-OSY	-	-	-	-	-	-	SGD 34307.59
B	LF709-NRS	-	-	-	-	-	-	SGD 8216.98
C	LF709-OSY 2 1/2	2 1/2"	110° F	175 PSI	33° F	2-1/2"	Outside Stem And Yoke Gate Valve	SGD 9263.86	RFQ
D	LF709-DOSY 2 1/2	2-1/2"	110 Degree F	12.1 Bar	33 Degree F	2-1/2"	Outside Stem And Yoke Gate Valve	SGD 9913.88	RFQ
E	LF709-LF 2 1/2	2-1/2"	110 Degree F	12.1 Bar	33 Degree F	2-1/2"	No Shutoff Valve	SGD 5793.45	RFQ
C	LF709-OSY 3	3"	110° F	175 PSI	33° F	3"	Outside Stem And Yoke Gate Valve	SGD 10173.44	RFQ
F	LF709-DOSY 3	3"	110 Degree F	12.1 Bar	33 Degree F	3"	Outside Stem And Yoke Gate Valve	SGD 10173.44	RFQ
G	LF709-LF 3	3"	110 Degree F	12.1 Bar	33 Degree F	3"	No Shutoff Valve	SGD 6362.76	RFQ
H	LF709-LF 4	4"	110 Degree F	12.1 Bar	33 Degree F	4"	No Shutoff Valve	SGD 6751.04	RFQ
I	LF709-DOSY 4	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Outside Stem And Yoke Gate Valve	SGD 10795.13	RFQ
J	LF709-OSY 4	4"	110° F	175 PSI	33° F	4"	Outside Stem And Yoke Gate Valve	SGD 10795.13	RFQ
K	LF709-DOSY 6	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Outside Stem And Yoke Gate Valve	SGD 17816.57	RFQ
L	LF709-LF 6	6"	110 Degree F	12.1 Bar	33 Degree F	6"	No Shutoff Valve	SGD 11137.57	RFQ
J	LF709-OSY 6	6"	110° F	175 PSI	33° F	6"	Outside Stem And Yoke Gate Valve	SGD 17816.57	RFQ
M	LF709-NRS 6	6"	110° F	175 PSI	33° F	6"	Non Rising Stem Gate Valve	SGD 16701.97	RFQ
N	LF709-DOSY 8	8"	110 Degree F	12.1 Bar	33 Degree F	8"	Outside Stem And Yoke Gate Valve	SGD 37948.25	RFQ
O	LF709-LF 8	8"	110 Degree F	12.1 Bar	33 Degree F	8"	No Shutoff Valve	SGD 23721.27	RFQ
P	LF709-OSY-S 8	8"	110° F	175 PSI	33° F	8"	Outside Stem And Yoke Gate Valve	SGD 45134.06	RFQ
J	LF709-OSY 8	8"	110° F	175 PSI	33° F	8"	Outside Stem And Yoke Gate Valve	SGD 37948.25	RFQ
Q	LF709-LF 10	10"	110 Degree F	12.1 Bar	33 Degree F	10"	No Shutoff Valve	SGD 30630.44	RFQ
J	LF709-OSY 10	10"	110° F	175 PSI	33° F	10"	Outside Stem And Yoke Gate Valve	SGD 49006.51	RFQ
R	LF709-DOSY 10	10"	110 Degree F	12.1 Bar	33 Degree F	10"	Outside Stem And Yoke Gate Valve	SGD 52438.44	RFQ

WATTS -

825Y Series Reduced Pressure Zone Backflow Preventer Assemblies

Style	Model	Price (inc. GST)
A	825Y-QT 3/4	SGD 847.45	RFQ
B	825Y-QT 1	SGD 816.46	RFQ
C	825Y-QT 1 1/4	SGD 1646.86	RFQ
D	825Y-QT 1 1/2	SGD 1694.84	RFQ
E	825Y-QT 2	SGD 1797.37	RFQ

WATTS -

825YA Series Reduced Pressure Zone Assembly Backflow Preventers

Style	Model	Price (inc. GST)
A	825YA-QT 3/4	SGD 1096.06	RFQ
B	825YA-QT 1	SGD 1168.09	RFQ
C	825YA-QT 1 1/2	SGD 2114.76	RFQ
D	825YA-QT 2	SGD 2288.14	RFQ

WATTS -

825YD Series Reduced Pressure Zone Backflow Preventer Assemblies

Style	Model	Price (inc. GST)
A	D825YD-OSY 6	SGD 20283.61	RFQ
B	D825YD-NRS 8	SGD 29729.43	RFQ

WATTS -

850 Small Series Double Check Valve Backflow Preventer Assemblies

Style	Model	Inlet Size	Price (inc. GST)
A	850L-LG-DN15-BSP-DCV	-	SGD 283.59	RFQ
B	850L-LG-DN20-BSP-DCV	-	SGD 276.99	RFQ
C	850L-LG-DN25-BSP-DCV	-	SGD 363.18	RFQ
D	850L-LG-DN32-BSP-DCV	-	SGD 573.65	RFQ
E	850L-LG-DN40-BSP-DCV	-	SGD 656.55	RFQ
F	850L-LG-DN50-BSP-DCV	-	SGD 744.89	RFQ
G	850U-QT 3/4	-	SGD 503.87	RFQ
H	850U-QT 2	-	SGD 1348.01	RFQ
I	850-QT 1 1/2	1 1/2"	SGD 948.86	RFQ
J	850-QT 1 1/4	1 1/4"	SGD 893.33	RFQ
K	850-QT 1	1"	SGD 469.42	RFQ
L	850-QT 2	2"	SGD 1128.78	RFQ
M	850-QT 3/4	3/4"	SGD 417.94	RFQ

WATTS -

860 Small Series Reduced Pressure Zone Backflow Preventer Assemblies

Style	Model	Price (inc. GST)
A	860L-DN15 BSP-LG-RPZ 1/2	SGD 521.33	RFQ
B	860L-DN20 BSP-LG-RPZ 3/4	SGD 533.34	RFQ
C	860L-DN25 BSP-LG-RPZ 1	SGD 567.11	RFQ
D	860-QT 1	SGD 749.91	RFQ
E	U860-QT 1/2	SGD 892.15	RFQ
F	U860-QT 1	SGD 1099.34	RFQ
G	U860-QT 3/4	SGD 1005.57	RFQ
H	U860-QT 1 1/4	SGD 1776.66	RFQ
I	860L-DN32-BSP-LG-RPZ	SGD 961.93	RFQ
J	860L-DN40-BSP-LG-RPZ	SGD 1044.83	RFQ
K	860L-DN50-BSP-LG-RPZ	SGD 1064.48	RFQ

WATTS -

957RPDA Series Reduced Pressure Backflow Preventer Assemblies

Style	Model	Body Pattern	Body Style	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Type	Price (inc. GST)
A	957NRPDA-DOSY-GPM 8	-	N-Pattern	8"	110 Degree F	12.06 Bar	33 Degree F	8"	Valve to Accessory	SGD 30049.39	RFQ
B	957RPDA-OSY-LM 8	-	Straight	8"	110 Degree F	12.06 Bar	33 Degree F	8"	Valve to Accessory	SGD 23804.17	RFQ
C	957NRPDA-BFG-GPM 2 1/2	-	N-Pattern	2-1/2"	110 Degree F	12.06 Bar	33 Degree F	2-1/2"	Valve to Accessory	SGD 9754.64	RFQ
D	957NRPDA-BFG-GPM 3	-	N-Pattern	3"	110 Degree F	12.06 Bar	33 Degree F	3"	Valve to Accessory	SGD 10561.69	RFQ
E	957NRPDA-BFG-GPM 4	-	N-Pattern	4"	110 Degree F	12.06 Bar	33 Degree F	4"	Valve to Accessory	SGD 14350.58	RFQ
F	957NRPDA-BFG-GPM 8	-	N-Pattern	8"	110 Degree F	12.06 Bar	33 Degree F	8"	Valve to Accessory	SGD 30581.15	RFQ
G	957ZRPDA-BFG-CFM 3	-	Z-Pattern	3"	110 Degree F	12.06 Bar	33 Degree F	3"	Valve to Accessory	SGD 10561.69	RFQ
G	957ZRPDA-BFG-GPM 2 1/2	-	Z-Pattern	2-1/2"	110 Degree F	12.06 Bar	33 Degree F	2-1/2"	Valve to Accessory	SGD 9754.64	RFQ
G	957ZRPDA-BFG-GPM 4	-	Z-Pattern	4"	110 Degree F	12.06 Bar	33 Degree F	4"	Valve to Accessory	SGD 14350.58	RFQ
G	957ZRPDA-BFG-GPM 6	-	Z-Pattern	6"	110 Degree F	12.06 Bar	33 Degree F	6"	Valve to Accessory	SGD 21162.67	RFQ
G	957ZRPDA-BFG-GPM 8	-	Z-Pattern	8"	110 Degree F	12.06 Bar	33 Degree F	8"	Valve to Accessory	SGD 30581.15	RFQ
B	957RPDA-OSY-LM 2 1/2	-	Straight	2-1/2"	110 Degree F	12.06 Bar	33 Degree F	2-1/2"	Valve to Accessory	SGD 6803.35	RFQ
B	957RPDA-OSY-LM 3	-	Straight	3"	110 Degree F	12.06 Bar	33 Degree F	3"	Valve to Accessory	SGD 7573.35	RFQ
B	957RPDA-OSY-LM 6	-	Straight	6"	110 Degree F	12.06 Bar	33 Degree F	6"	Valve to Accessory	SGD 14389.83	RFQ
H	957ZRPDA-DOSY-GPM 8	-	Z-Pattern	8"	110 Degree F	12.06 Bar	33 Degree F	8"	Valve to Accessory	SGD 30049.39	RFQ
I	957NRPDA-OSY-GPM 2 1/2	-	N-Pattern	2-1/2"	110 Degree F	12.06 Bar	33 Degree F	2-1/2"	Valve to Accessory	SGD 9237.67	RFQ
I	957NRPDA-OSY-GPM 3	-	N-Pattern	3"	110 Degree F	12.06 Bar	33 Degree F	3"	Valve to Accessory	SGD 10042.56	RFQ
H	957ZRPDA-DOSY-CFM 8	-	Z-Pattern	8"	110 Degree F	12.06 Bar	33 Degree F	8"	Valve to Accessory	SGD 30049.39	RFQ
B	957RPDA-DOSY-LM 8	-	Straight	8"	110 Degree F	12.06 Bar	33 Degree F	8"	Valve to Accessory	SGD 23804.17	RFQ
J	957NRPDA-DOSY-LM 8	-	N-Pattern	8"	110 Degree F	12.06 Bar	33 Degree F	8"	Valve to Accessory	SGD 29886.97	RFQ
K	957ZRPDA-DOSY-LM 8	-	Z-Pattern	8"	110 Degree F	12.06 Bar	33 Degree F	8"	Valve to Accessory	SGD 29886.97	RFQ
L	957-RPDA-OSY-CFM 2 1/2	-	Straight	2-1/2"	110 Degree F	12.06 Bar	33 Degree F	2-1/2"	Valve to Accessory	SGD 6960.39	RFQ
I	957NRPDA-OSY-CFM 3	-	N-Pattern	3"	110 Degree F	12.06 Bar	33 Degree F	3"	Valve to Accessory	SGD 10042.56	RFQ
I	957NRPDA-OSY-CFM 4	-	N-Pattern	4"	110 Degree F	12.06 Bar	33 Degree F	4"	Valve to Accessory	SGD 13833.59	RFQ
I	957NRPDA-OSY-CFM 6	-	N-Pattern	6"	110 Degree F	12.06 Bar	33 Degree F	6"	Valve to Accessory	SGD 20630.44	RFQ

WATTS -

9D Series Dual Check Valve Backflow Preventers

Style	Model	Inlet Connection	Inlet Size	Inlet Type	Item	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Connection	Price (inc. GST)
A	9D-S-M3 1/2	-	1/2"	Union Solder	Dual Check Valve	250 Degree F	12.1 Bar	33 Degree F	-	SGD 236.69
B	9DS-SC-M2	-	3/4"	Union Solder	Dual Check Valve	250 Degree F	12.1 Bar	33 Degree F	-	SGD 325.04
C	9DM2 (W/PRESS) 3/4	-	3/4"	Press	Dual Check Valve	250 Degree F	12.1 Bar	33 Degree F	-	SGD 202.58
D	9DM3 (W/PRESS) 1/2	-	1/2"	Press	Dual Check Valve	250 Degree F	12.1 Bar	33 Degree F	-	SGD 194.96
E	9D-S-M2 3/4	-	3/4"	Union Solder	Dual Check Valve	250 Degree F	12.1 Bar	33 Degree F	-	SGD 242.14
F	9DM2 3/4	-	-	-	Pressure Relief Valve	-	-	-	-	SGD 254.75	RFQ
G	9DM2-LU	Female Threaded	3/4"	Female Threaded	Dual Check Valve	250° F	175 PSI	33° F	Female Threaded	SGD 247.56
H	9D-SC	Union Female Threaded	1/2"	Union Female Threaded	Dual Check Valve	250° F	175 PSI	33° F	Union Joint	SGD 320.64
I	9D-SC-M2	Union Female Threaded	3/4"	Union Female Threaded	Dual Check Valve	250° F	175 PSI	33° F	Union Joint	SGD 325.04
J	9DM2-Z5	Union Female Threaded	1/2"	Union Female Threaded	Dual Check Valve	250° F	175 PSI	33° F	Union Joint	SGD 254.15
K	9DM3-SC	Union Female Threaded	1/2"	Union Female Threaded	Dual Check Valve	250° F	175 PSI	33° F	Union Joint	SGD 320.64

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Features

Watts backflow preventers feature a compact, modular design for installation in tight spaces.
Their single-cover, top-entry facility permits easy access for maintenance purposes.
They are capable of bearing up to 180 psi pressures and have a maximum operating temperature of 180 degrees F.
They come equipped with replaceable seats and seat discs. They do not require any special tools for servicing.

Categories

Brands

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

Backflow Preventer Accessories

880V Series Reduced Pressure Zone Backflow Preventer Assemblies

LF4000B Series Reduced Pressure Zone Backflow Preventer Assemblies

RK-LF007DCDA Series Backflow Preventer Repair Kit

400B Series Reduced Pressure Zone Backflow Preventer Assemblies

LFM500 Series Reduced Pressure Detector Backflow Preventer Assemblies

SS007 Series Double Check Valve Backflow Preventer Assemblies

007M1DCDA Series Double Check Detector Bvackflow Preventer Assemblies

SS009 Series Reduced Pressure Zone Backflow Preventer Assemblies

009 Series Reduced Pressure Zone Backflow Preventer Assemblies

C300 Series Double Check Detector Backflow Preventer Assemblies

LFCu7 Series Dual Check Valve Backflow Preventers

LF8 Series Vacuum Breakers

LF709 Series Double Check Valve Backflow Preventer Assemblies

825Y Series Reduced Pressure Zone Backflow Preventer Assemblies

825YA Series Reduced Pressure Zone Assembly Backflow Preventers

825YD Series Reduced Pressure Zone Backflow Preventer Assemblies

850 Small Series Double Check Valve Backflow Preventer Assemblies

860 Small Series Reduced Pressure Zone Backflow Preventer Assemblies

957RPDA Series Reduced Pressure Backflow Preventer Assemblies

9D Series Dual Check Valve Backflow Preventers

Features

Frequently Asked Questions

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Categories

Brands

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

Features

Frequently Asked Questions

How does backflow occur?

Can check valves prevent backflow?

Are dual check valves the same as backflow preventers?

We are here to help!

Looking for a part not listed here?

Popular Search Queries

Explore More

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