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.

Backflow Preventers

WATTS -

Backflow Preventer Accessories

A

B

C

D

E

F

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

G

H

I

J

K

L

Style	Model	Connection Type	Item	Length	Material	Max. Pressure	Size	Width	Price (ex. VAT)
A	1/4 LFTC	MNPT	Test Cock	1.75"	Copper Silicon Alloy	175 psi	1/4"	1"	€105.42
B	LFTC 2 1/2-4	Npt	Test Cock	1.625"	Bronze	175 psi	1/2"	1"	€166.28
B	LFTC 6-10	Npt	Test Cock	-	Bronze	-	3/4"	-	€156.64
C	909 AGM 8-10 909	Npt	Air Gap	11.25"	Cast Iron	175 psi	4mm	7.38"	€741.69
D	4 909 AGK	Npt	Air Gap	9.625"	Cast Iron	140 psi	4" to 6"	6.38"	€474.55
E	909 AGK 4-6 8-10 M1	Npt	Air Gap	9.625"	Cast Iron	175 psi	3"	6.38"	€591.72
F	1/4 LF-TC	Npt	Test Cock	-	Bronze	-	1/4"	-	€88.53
G	RK-TC-P Plastci Cap Tether 1/8 1/4 NPT	Npt	Cap Tether	-	Plastic	-	1/8" to 1/4"	-	€4.42
H	1/8 LF-NPT-TC	Npt	Test Cock	-	Bronze	-	1/8"	-	€68.49
I	RK-SAE-TC 1/8 SAE	SAE	Test Cock	11.25"	Bronze	-	1/8"	7.38"	€13.42
J	SAE-TC Brass Cap 1/8 SAE	SAE	Cap	-	Brass	-	1/8"	-	€5.67
K	SAE-TC Plastic Cap 1/8 SAE	SAE	Cap	-	Brass	-	1/8"	-	€5.71
L	SAE-TC-Adapter 1/4	SAE	Adapter	-	Bronze	-	1/4"	-	€87.46

WATTS -

994 Series Reduced Pressure Zone Assemblies

A

B

C

D

E

Style	Model	Inlet Connection	Inlet Size	Inlet Type	Outlet Connection	Outlet Size	Outlet Type	Type	Valve Type	Price (ex. VAT)
A	994-DOSY 4	Flanged Joint	4"	Flanged Joint	Flanged Joint	4"	Flanged Joint	Valve to Accessory	Outside Stem And Yoke Gate Valve	€7,613.91	RFQ
A	994-OSY 10	Flanged Joint	10"	Flanged Joint	Flanged Joint	10"	Flanged Joint	Valve to Accessory	Outside Stem And Yoke Gate Valve	€27,009.13	RFQ
B	994-NRS 8	Flanged Joint	8"	Flanged Joint	Flanged Joint	8"	Flanged Joint	Valve to Accessory	Non Rising Stem Gate Valve	€18,654.08	RFQ
A	994-DOSY 3	Flanged Joint	3"	Flanged Joint	Flanged Joint	3"	Flanged Joint	Valve to Accessory	Outside Stem And Yoke Gate Valve	€6,883.32	RFQ
C	994-LF 10	Flanged Joint	10"	Flanged Joint	-	10"	-	Valve to Accessory	No Shutoff Valve	€20,291.02	RFQ
A	994-OSY 8	Flanged Joint	8"	Flanged Joint	Flanged Joint	8"	Flanged Joint	Kit	Outside Stem And Yoke Gate Valve	€19,819.09	RFQ
A	994-OSY 3	Flanged Joint	3"	Flanged Joint	Flanged Joint	3"	Flanged Joint	Kit	Outside Stem And Yoke Gate Valve	€6,433.11	RFQ
D	994-NRS 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	Flanged Joint	2-1/2"	Flanged Joint	Valve to Accessory	Non Rising Stem Gate Valve	€5,176.32	RFQ
A	994-OSY 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	Flanged Joint	2-1/2"	Flanged Joint	Kit	Outside Stem And Yoke Gate Valve	€5,532.61	RFQ
A	994-DOSY 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	Flanged Joint	2-1/2"	Flanged Joint	Valve to Accessory	Outside Stem And Yoke Gate Valve	€5,920.71	RFQ
E	994-LF 8	Flanged Joint	8"	Flanged Joint	-	8"	-	Valve to Accessory	No Shutoff Valve	€15,616.93	RFQ
B	994-NRS 6	Flanged Joint	6"	Flanged Joint	Flanged Joint	6"	Flanged Joint	Valve to Accessory	Non Rising Stem Gate Valve	€10,656.44	RFQ
A	994-OSY 6	Flanged Joint	6"	Flanged Joint	Flanged Joint	6"	Flanged Joint	Kit	Outside Stem And Yoke Gate Valve	€11,320.76	RFQ
C	994-LF 6	Flanged Joint	6"	Flanged Joint	-	6"	-	Valve to Accessory	No Shutoff Valve	€8,822.37	RFQ
A	994-OSY 4	Flanged Joint	4"	Flanged Joint	Flanged Joint	4"	Flanged Joint	Kit	Outside Stem And Yoke Gate Valve	€7,113.98	RFQ
B	994-NRS 3	Flanged Joint	3"	Flanged Joint	Flanged Joint	3"	Flanged Joint	Valve to Accessory	Non Rising Stem Gate Valve	€5,844.76	RFQ
A	994-DNRS 3	Flanged Joint	3"	Flanged Joint	Flanged Joint	3"	Flanged Joint	Valve to Accessory	Non Rising Stem Gate Valve	€5,844.76	RFQ
A	994-OSY-GXG 3	Grooved Joint	3"	Grooved Joint	Grooved Joint	3"	Grooved Joint	Valve to Accessory	Outside Stem And Yoke Gate Valve	€6,883.32	RFQ
A	994-OSY-GXG 8	Grooved Joint	8"	Grooved Joint	Grooved Joint	8"	Grooved Joint	Valve to Accessory	Outside Stem And Yoke Gate Valve	€21,206.63	RFQ
A	994-OSY-GXG 4	Grooved Joint	4"	Grooved Joint	Grooved Joint	4"	Grooved Joint	Valve to Accessory	Outside Stem And Yoke Gate Valve	€7,613.91	RFQ
A	994-OSY-GXG 2 1/2	Grooved Joint	2 1/2"	Grooved Joint	Grooved Joint	2-1/2"	Grooved Joint	Valve to Accessory	Outside Stem And Yoke Gate Valve	€5,920.71	RFQ
A	994-OSY-GXG 6	Grooved Joint	6"	Grooved Joint	Grooved Joint	6"	Grooved Joint	Valve to Accessory	Outside Stem And Yoke Gate Valve	€12,113.51	RFQ

WATTS -

Double Check Valve Backflow Preventer Assemblies

A

B

Style	Model	Body Material	Disc Material	Inlet Size	Item	Max. Temp.	Min. Temp.	Seat Material	Price (ex. VAT)
A	200-LBV 2	Bronze	Silicone	2"	Double Check Valve Assembly	180° F	33° F	Rubber	€816.93	RFQ
B	870V-4-DC-LG-DIN-N&V	Ductile Iron	EPDM	4"	Reduced Press. Zone Assembly	140° F	32° F	Stainless Steel	€3,063.24	RFQ

WATTS -

5000SS Series Reduced Pressure Detector Assemblies

A

B

C

D

Style	Model	Inlet Connection	Inlet Size	Price (ex. VAT)
A	5000SS-DOSY-FXG-GPM 3	Flanged Joint	3"	€6,499.38	RFQ
B	5000SS-DOSY-FXG-GPM 6	Flanged Joint	6"	€11,248.95	RFQ
C	5000SS-DOSY-GXG-GPM 4	Grooved Joint	4"	€8,198.11	RFQ
D	5000SS-DOSY-GXG-GPM 6	Grooved Joint	6"	€12,036.16	RFQ

WATTS -

3000SE Series Double Check Detector Backflow Preventer Assemblies

A

B

C

D

E

F

Style	Model	Inlet Connection	Price (ex. VAT)
A	3000SE-LG-CFM 2 1/2	-	€6,172.08	RFQ
B	3000SE-OSY-CFM 2 1/2	-	€8,152.54	RFQ
C	3000SE-OSY-LM 2 1/2	Flanged Joint	€8,004.76	RFQ
D	3000SE-LG-LM 2 1/2	Flanged Joint	€6,025.69	RFQ
E	3000SE-OSY-GPM 2 1/2	Flanged Joint	€8,152.54	RFQ
F	3000SE-LG-GPM 2 1/2	Grooved Joint	€6,172.08	RFQ

WATTS -

200B Series Double Check Valve Assemblies

A

B

Style	Model	Inlet Size	Price (ex. VAT)
A	200B 1	1"	€459.91	RFQ
A	200B 2	2"	€955.01	RFQ
B	200B 3/4	3/4"	€406.72	RFQ

WATTS -

4000SS Series Reduced Pressure Zone Assemblies

A

B

C

Style	Model	Inlet Size	Price (ex. VAT)
A	4000SS-F-OSY 4	4"	€6,648.54	RFQ
B	4000SS-LG 10	10"	€19,388.91	RFQ
A	4000SS-OSY 10	10"	€26,497.22	RFQ
C	4000SS-NRS 10	10"	€26,211.30	RFQ

WATTS -

5000SS Series Reduced Pressure Zone Assemblies

A

B

C

Style	Model	Inlet Size	Price (ex. VAT)
A	5000SS-LG-GPM 2 1/2	2 1/2"	€4,774.40	RFQ
B	5000SS-OSY-GPM 2 1/2	2 1/2"	€5,879.27	RFQ
A	5000SS-LG-GPM 3	3"	€5,228.79	RFQ
C	5000SS-OSY-GPM 3	3"	€6,499.38	RFQ
C	5000SS-OSY-GPM 4	4"	€7,662.27	RFQ
A	5000SS-LG-GPM 4	4"	€6,236.97	RFQ
A	5000SS-LG-GPM 6	6"	€9,036.44	RFQ
C	5000SS-OSY-GPM 6	6"	€11,248.95	RFQ

WATTS -

957 Series Reduced Pressure Zone Assemblies

A

B

C

D

E

F

G

Style	Model	Body Style	Inlet Connection	Inlet Size	Inlet Type	Item	Length	Max. Temp.	Max. Working Pressure	Price (ex. VAT)
A	957-NRS 8	Inline	-	8"	Grooved Joint	Reduced Press. Zone Assembly	-	110 Degree F	12.1 Bar	€11,735.83	RFQ
B	957-OSY 10	Inline	Grooved Joint	10"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€19,769.79	RFQ
B	957-DOSY 8	Inline	Grooved Joint	8"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€16,080.37	RFQ
C	957-NRS-GXG 6	Inline	Grooved Joint	6"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€8,714.65	RFQ
C	957-OSY-GXG 3	Inline	Grooved Joint	3"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€5,260.56	RFQ
C	957-OSY-GXG 2 1/2	Inline	Grooved Joint	2 1/2"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€4,706.74	RFQ
D	957-DNRS 4	Inline	Flanged Joint	4"	Flanged Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€3,436.72	RFQ
E	957-DNRS 3	Inline	Flanged Joint	3"	Flanged Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€2,711.13	RFQ
E	957-NRS 4	Inline	Flanged Joint	4"	Flanged Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€3,436.72	RFQ
B	957-DOSY 6	Inline	Grooved Joint	6"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€10,463.09	RFQ
F	957-NRS-S 2 1/2	Inline	-	2-1/2"	Grooved Joint	Reduced Press. Zone Assembly	-	110 Degree F	12.1 Bar	€3,553.52	RFQ
F	957-NRS-S 3	Inline	-	3"	Grooved Joint	Reduced Press. Zone Assembly	-	110 Degree F	12.1 Bar	€4,335.23	RFQ
C	957-BFG 4	Inline	-	4"	Grooved Joint	Reduced Press. Zone Assembly	-	110 Degree F	12.1 Bar	€6,039.49	RFQ
A	957-NRS 6	Inline	-	6"	Flanged Joint	Reduced Press. Zone Assembly	-	140 Degree F	12.1 Bar	€6,706.81	RFQ
G	957-OSY 4	Inline	Flanged Joint	4"	Flanged Joint	Backflow Preventer	-	140° F	175 PSI	€6,041.90
B	957-OSY 8	Inline	Flanged Joint	8"	Flanged Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€16,104.32	RFQ
G	957-OSY 3	Inline	-	3"	Flanged Joint	Reduced Press. Zone Assembly	31 11/16"	140 Degree F	12.1 Bar	€4,465.88
C	957-OSY-FXG 6	Inline	Flanged Joint	6"	Flanged Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€9,260.18	RFQ
C	957-OSY-GXG 8	Inline	Grooved Joint	8"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€16,080.37	RFQ
C	957-OSY-GXG 4	Inline	Grooved Joint	4"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€5,821.28	RFQ
C	957-OSY-GXG 6	Inline	Grooved Joint	6"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€9,260.18	RFQ
E	957-DNRS 2 1/2	Inline	Flanged Joint	2 1/2"	Flanged Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€2,582.10	RFQ
E	957-DNRS 10	Inline	Flanged Joint	10"	Flanged Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€37,244.80	RFQ
B	957-DOSY 3	Inline	Grooved Joint	3"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€5,945.56	RFQ
B	957-DOSY 4	Inline	Grooved Joint	4"	Grooved Joint	Reduced Press. Zone Assembly	-	140° F	175 PSI	€6,573.98	RFQ

WATTS -

LF909 Small Series Reduced Pressure Zone Assemblies

A

B

Style	Model	Length	Size	Width
A	2 1/2 LF909-DNRS	41.25"	2.5"	13 1/16"	RFQ
B	6 LF909-DOSY	66"	6	25.375"	RFQ

WATTS -

909 Large Series Reduced Pressure Zone Assemblies

A

B

C

D

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Type	Valve Type	Price (ex. VAT)
A	909-DNRS-S-FDA 3	3"	110 Degree F	12.06 Bar	33 Degree F	3"	Valve to Accessory	Non Rising Stem Gate Valve	€11,432.60	RFQ
B	909-DNRS-S 4	4"	110 Degree F	12.06 Bar	33 Degree F	4"	Valve to Accessory	Non Rising Stem Gate Valve	€9,439.71	RFQ
C	SR909-OSY 4	4"	110° F	175 PSI	33° F	4"	Valve to Accessory	Outside Stem And Yoke Gate Valve	€14,885.34	RFQ
D	909-DNRS-S-FDA 4	4"	110° F	175 PSI	33° F	4"	Kit	Non Rising Stem Gate Valve	€14,511.08	RFQ
A	909-DNRS-S-FDA 6	6"	110 Degree F	12.06 Bar	33 Degree F	6"	Valve to Accessory	Non Rising Stem Gate Valve	€21,603.63	RFQ

WATTS -

Ames Colt Series LFC500 Reduced Pressure Detector Assemblies

A

B

Style	Model	Inlet Size	Max. Temp.	Price (ex. VAT)
A	LFC500-OSY-GPM 2 1/2	2 1/2"	110° F	€5,133.49	RFQ
A	LFC500-OSY-CFM 2 1/2	2 1/2"	110° F	€5,133.49	RFQ
A	LFC500-OSY-CFM 3	3"	110° F	€5,672.12	RFQ
A	LFC500-OSY-GPM 3	3"	110° F	€5,672.12	RFQ
A	LFC500-DOSY-C 4	4"	110° F	€7,554.53	RFQ
B	LFC500-DOSY-LM 4	4"	110° F	€7,438.53	RFQ
A	LFC500-OSY-CFM 4	4"	110° F	€6,687.21	RFQ
A	LFC500-OSY-GPM 4	4"	110° F	€6,687.21	RFQ
A	LFC500-OSY-CFM 6	6"	110° F	€9,818.13	RFQ
A	LFC500-DOSY-C 6	6"	110° F	€11,094.25	RFQ
A	LFC500-OSY-GPM 6	6"	110° F	€9,818.13	RFQ
A	LFC500-OSY-CFM 8	8"	110° F	€17,458.09	RFQ
A	LFC500-OSY-GPM 8	8"	110° F	€17,458.09	RFQ
A	LFC500-DOSY-C 8	8"	140° F	€17,458.09	RFQ
A	LFC500-OSY-GPM 10	10"	110° F	€24,904.52	RFQ
A	LFC500-OSY-CFM 10	10"	110° F	€24,904.52	RFQ

WATTS -

Ames Colt Series LFC500N Reduced Pressure Detector Assemblies

A

Style	Model	Inlet Size	Max. Temp.	Price (ex. VAT)
A	LFC500N-OSY-CFM 4	4"	110° F	€7,381.91	RFQ
A	LFC500N-DOSY-LM 6	6"	140° F	€12,240.55	RFQ
A	LFC500N-OSY-CFM 6	6"	110° F	€10,943.72	RFQ
A	LFC500N-OSY-GPM 8	8"	110° F	€19,021.76	RFQ
A	LFC500N-DOSY-C 8	8"	140° F	€19,021.76	RFQ
A	LFC500N-OSY-GPM 10	10"	110° F	€28,440.68	RFQ

WATTS -

719 Series Double Check Valve Assemblies
Watts 719 Series double check valve assemblies are used in plumbing systems to prevent the backflow of water and protect the potable water supply from contamination. These backflow preventers feature bronze alloy construction for structural rigidity and corrosion resistance. They are further coupled with elastomers that resist the effects of chloramine. These backflow preventers have a separate access and a top-entry check valve arrangement that facilitates convenient maintenance procedures. They have a maximum working pressure of 175 psi (12.06 bar).

A

B

Style	Model	Inlet Connection	Inlet Size	Inlet Thread Type	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Connection	Outlet Size	Price (ex. VAT)
A	719QTS 2	-	2"	-	180 Degree F	12.1 Bar	33 Degree F	-	2"	€1,326.53	RFQ
B	719-LF 1 1/4	-	1-1/4"	-	180 Degree F	12.1 Bar	33 Degree F	-	1-1/4"	€651.19	RFQ
A	719-AQT-R10 3/4	-	3/4"	-	180 Degree F	12.1 Bar	33 Degree F	-	3/4"	€756.13	RFQ
B	719QT-S-R10 3/4	-	3/4"	-	180 Degree F	12.1 Bar	33 Degree F	-	3/4"	€609.05	RFQ
B	719QT-S-R10 1/2	-	1/2"	-	180 Degree F	12.1 Bar	33 Degree F	-	1/2"	€609.05	RFQ
B	719-LF 3/4	Female Threaded	3/4"	FPT	180° F	175 PSI	33° F	Female Threaded	-	€417.09	RFQ
B	719-QT-LH 1	Female Threaded	1"	-	180° F	175 PSI	33° F	Female Threaded	-	€516.54	RFQ
B	719-LF 1/2	Female Threaded	1/2"	FPT	180° F	175 PSI	33° F	Female Threaded	-	€382.57	RFQ
B	U719-QT-S 2	Union Joint	2"	NPT	180° F	175 PSI	33° F	Union Joint	-	€1,579.96	RFQ

WATTS -

LF709 Series Double Check Valve Assemblies

A

B

C

D

E

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Valve Type	Price (ex. VAT)
A	LF709-QT-FDA 2 1/2	2 1/2"	110° F	175 PSI	33° F	-	-	€7,039.38	RFQ
A	LF709-NRS-S 2 1/2	2 1/2"	110° F	175 PSI	33° F	2-1/2"	Non Rising Stem Gate Valve	€6,649.93	RFQ
A	LF709-QT-S-FDA 2 1/2	2 1/2"	110° F	175 PSI	33° F	-	-	€7,750.64	RFQ
B	LF709-NRS 2 1/2	2-1/2"	110 Degree F	12.1 Bar	33 Degree F	2-1/2"	Non Rising Stem Gate Valve	€5,502.23	RFQ
A	LF709-DNRS 2 1/2	2-1/2"	110 Degree F	12.1 Bar	33 Degree F	2-1/2"	Non Rising Stem Gate Valve	€5,887.55	RFQ
C	LF709-QT-FDA 3	3"	110° F	175 PSI	33° F	3"	Quarter Turn Ball Valve	€7,729.95	RFQ
C	LF709-QT-S-FDA 3	3"	110° F	175 PSI	33° F	3"	Quarter Turn Ball Valve	€8,482.61	RFQ
D	LF709-DNRS 3	3"	110° F	175 PSI	33° F	3"	Non Rising Stem Gate Valve	€6,039.49	RFQ
E	LF709-NRS 4	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Non Rising Stem Gate Valve	€6,409.61	RFQ
C	LF709-NRS-S-FDA 4	4"	110 Degree F	12.1 Bar	33 Degree F	4"	Non Rising Stem Gate Valve	€7,582.14	RFQ
C	LF709-QT-FDA 4	4"	110° F	175 PSI	33° F	4"	Quarter Turn Ball Valve	€8,200.88	RFQ
D	LF709-DNRS 4	4"	110° F	175 PSI	33° F	4"	Non Rising Stem Gate Valve	€6,409.61	RFQ
C	LF709-QT-S-FDA 4	4"	110° F	175 PSI	33° F	4"	Quarter Turn Ball Valve	€9,373.41	RFQ
D	LF709-DNRS 6	6"	110° F	175 PSI	33° F	6"	Non Rising Stem Gate Valve	€11,315.24	RFQ
C	LF709-NRS-S-FDA 6	6"	110 Degree F	12.1 Bar	33 Degree F	6"	Non Rising Stem Gate Valve	€12,418.72	RFQ
A	LF709-QT-FDA 6	6"	110° F	175 PSI	33° F	-	-	€13,536.01	RFQ
C	LF709-QT-FDA 8	8"	110 Degree F	12.1 Bar	33 Degree F	8"	Quarter Turn Ball Valve	€28,834.62	RFQ
D	LF709-NRS 8	8"	110° F	175 PSI	33° F	8"	Non Rising Stem Gate Valve	€22,525.20	RFQ
D	LF709-DNRS 8	8"	110° F	175 PSI	33° F	8"	Non Rising Stem Gate Valve	€24,103.59	RFQ
C	LF709-QT-S-FDA 8	8"	110° F	175 PSI	33° F	8"	Quarter Turn Ball Valve	€31,514.35	RFQ
D	LF709-NRS 10	10"	110° F	175 PSI	33° F	10"	Non Rising Stem Gate Valve	€29,090.83	RFQ
C	LF709-NRS-S-FDA 10	10"	110 Degree F	12.1 Bar	33 Degree F	10"	Non Rising Stem Gate Valve	€34,117.68	RFQ
D	LF709-DNRS 10	10"	110° F	175 PSI	33° F	10"	Non Rising Stem Gate Valve	€31,127.86	RFQ

WATTS -

709 Series Double Check Valve Backflow Preventer Assemblies

A

B

C

D

E

Style	Model	Inlet Connection	Inlet Size	Inlet Type	Item	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Connection	Price (ex. VAT)
A	709-QT-S 2 1/2	-	2-1/2"	Mechanical Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€7,805.88	RFQ
B	709-NRS 3	-	-	-	-	-	-	-	-	€5,127.97	RFQ
C	709-DNRS-S 10	-	10"	Mechanical Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€34,351.21	RFQ
D	SR709-OSY 8	-	8"	Flanged Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€24,194.18	RFQ
B	709-DNRS-S 6	-	6"	Mechanical Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€7,043.55	RFQ
C	709-DNRS-S 2 1/2	-	2-1/2"	Mechanical Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€6,256.32	RFQ
D	709-DOSY 6	-	-	-	-	-	-	-	-	€11,521.00	RFQ
A	709-QT 2 1/2	-	2-1/2"	Mechanical Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€7,089.10	RFQ
C	709-DNRS-S 3	-	3"	Mechanical Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€6,256.32	RFQ
C	709-DNRS-S 4	-	4"	Mechanical Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€7,043.55	RFQ
D	709-DOSY 10	-	-	-	-	-	-	-	-	€31,362.88	RFQ
D	SR709-OSY 10	-	10"	Flanged Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€31,241.11	RFQ
A	709-QT-FDA 4	-	-	-	-	-	-	-	-	€8,808.55	RFQ
B	709-DNRS-S 8	-	8"	Mechanical Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€24,875.10	RFQ
D	709-OSY 6	-	-	-	-	-	-	-	-	€10,464.48	RFQ
B	709-NRS-S 3	-	-	-	-	-	-	-	-	€7,390.91	RFQ
B	709-LF-BB 3	-	-	-	-	-	-	-	-	€6,866.74	RFQ
D	SR709-OSY 6	-	6"	Flanged Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€11,359.42	RFQ
A	709-QT 3	-	3"	Mechanical Joint	Double Check Valve Assembly	110 Degree F	12.1 Bar	33 Degree F	-	€7,782.42	RFQ
D	709-OSY 4	-	-	-	-	-	-	-	-	€6,695.50	RFQ
B	709-QT-S 6	-	6"	Mechanical Joint	Ball Valve	110 Degree F	12.1 Bar	33 Degree F	-	€15,483.96	RFQ
D	SR709-OSY 4	Flanged Joint	4"	Flanged Joint	Double Check Valve Assembly	110° F	175 PSI	33° F	Flanged Joint	€6,883.32	RFQ
E	SR709-OSY 3	Flanged Joint	3"	Flanged Joint	Double Check Valve Assembly	110° F	175 PSI	33° F	Flanged Joint	€6,485.58	RFQ
E	SR709-OSY 2 1/2	Flanged Joint	2 1/2"	Flanged Joint	Double Check Valve Assembly	110° F	175 PSI	33° F	Flanged Joint	€5,909.65	RFQ
A	709-QT 4	Mechanical Joint	4"	Mechanical Joint	Ball Valve	110° F	175 PSI	33° F	Mechanical Joint	€8,257.52	RFQ

WATTS -

Hose Connection Vacuum Breakers

A

B

C

D

Style	Model	Inlet Size	Max. Temp.	Max. Working Pressure	Mfr. Series	Min. Temp.	Outlet Size	Price (ex. VAT)
A	S8-PC-NPSM	1/2"	180 Degree F	8.6 Bar	8	33 Degree F	1/2"	€140.87
B	NF-8I	3/4"	180° F	125 psi	NF8	33° F	3/4"	€59.04
C	NF-8 3/4	3/4"	180 Degree F	8.6 Bar	NF8	33 Degree F	3/4"	€49.20
D	8FR 3/4	3/4"	180 Degree F	8.6 Bar	8FR	-	3/4"	€38.77

WATTS -

007 Series Double Check Valve Assemblies

A

B

C

D

E

F

G

H

I

J

K

L

M

Style	Model	Body Material	Disc Material	Inlet Size	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Seat Material	Price (ex. VAT)
A	U007M1-QT-SH 1 1/2	Bronze	Rubber	1-1/2"	180 Degree F	12.1 Bar	33 Degree F	1-1/2"	-	€1,152.50	RFQ
B	007M2-QT-CT 1 1/2	Bronze	Silicone	1 1/2"	180° F	175 PSI	33° F	1-1/2"	Engineered Plastic	€856.97	RFQ
A	U007M1-QT-SH 1	Bronze	Rubber	1"	180 Degree F	12.1 Bar	33 Degree F	1"	-	€623.55	RFQ
C	U007M1-QT 1	Bronze	Rubber	1"	180 Degree F	12.1 Bar	33 Degree F	1"	-	€559.34	RFQ
D	007M3-QT-S 3/4	Bronze	Silicone	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	Engineered Plastic	€519.28	RFQ
E	007M2-PC-QT 1 1/4	Bronze	Rubber	1-1/4"	180 Degree F	12.1 Bar	33 Degree F	1-1/4"	Rubber	€817.59	RFQ
F	007M1-PC-QT 1	Bronze	Rubber	1"	180 Degree F	12.1 Bar	33 Degree F	1"	Rubber	€555.19	RFQ
G	U007M2-QT 1 1/4	Bronze	Rubber	1-1/4"	180 Degree F	12.1 Bar	33 Degree F	1-1/4"	-	€933.63	RFQ
H	U007M2-QT-S 1 1/4	Bronze	Rubber	1-1/4"	180 Degree F	12.1 Bar	33 Degree F	1-1/4"	-	€1,308.57	RFQ
B	007M2-QT-CT 1 1/4	Bronze	Rubber	1 1/4"	180° F	175 PSI	33° F	1-1/4"	Rubber	€680.86	RFQ
A	007M3-QT-BC 3/4	Bronze	Rubber	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	Rubber	€451.60	RFQ
I	D007M1-QT 2	Bronze	-	2"	180 Degree F	12.1 Bar	33 Degree F	2"	-	€950.87	RFQ
J	007M2-QT 1 1/4	Bronze	Silicone	1 1/4"	180° F	175 PSI	33° F	1-1/4"	Engineered Plastic	€588.94	RFQ
K	007M3-QT-SH 3/4	Bronze	Rubber	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	Rubber	€412.95	RFQ
L	007-QT 1/2	Bronze	Silicone	1/2"	180 Degree F	12.1 Bar	33 Degree F	1/2"	Engineered Plastic	€259.05	RFQ
C	U007M1-QT-Z3 1	Bronze	Rubber	1"	180 Degree F	12.1 Bar	33 Degree F	1"	-	€604.91	RFQ
F	007M1-QT 1	Bronze	Silicone	1"	180 Degree F	12.1 Bar	33 Degree F	1"	Engineered Plastic	€321.46	RFQ
A	U007M1-QT-SH 3/4	Bronze	Rubber	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	-	€533.10	RFQ
I	007M1-QT 2	Bronze	Silicone	2"	180 Degree F	12.1 Bar	33 Degree F	2"	Engineered Plastic	€793.13	RFQ
G	U007M2-QT-Z3 1 1/2	Bronze	Rubber	1-1/2"	180 Degree F	12.1 Bar	33 Degree F	1-1/2"	-	€1,151.15	RFQ
C	U007M2-QT-Z3 3/4	Bronze	Rubber	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	-	€543.45	RFQ
K	007M3-QT 3/4	Bronze	Silicone	3/4"	180 Degree F	12.1 Bar	33 Degree F	3/4"	Engineered Plastic	€287.02	RFQ
J	007M2-QT 1 1/2	Bronze	Silicone	1 1/2"	180° F	175 PSI	33° F	1-1/2"	Engineered Plastic	€623.91	RFQ
A	007M1-QT-BC 1	Bronze	-	1"	180 Degree F	12.1 Bar	33 Degree F	1"	-	€513.07	RFQ
M	D007-QT-S 1/2	Bronze	-	1/2"	180 Degree F	12.1 Bar	33 Degree F	1/2"	-	€461.27	RFQ

WATTS -

957RPDA Series Reduced Pressure Zone Assemblies

A

B

C

Style	Model	Body Style	Inlet Size	Inlet Type	Max. Temp.	Max. Working Pressure	Min. Temp.	Outlet Size	Outlet Type	Price (ex. VAT)
A	957RPDA-OSY-GPM 8	Inline	8"	Flanged Joint	140 Degree F	12.1 Bar	33 Degree F	8"	Flanged Joint	€15,171.22	RFQ
A	957RPDA-OSY-GPM 4	Inline	4"	Flanged Joint	140 Degree F	12.1 Bar	33 Degree F	4"	Flanged Joint	€6,393.03	RFQ
A	957RPDA-OSY-GPM 6	Inline	6"	Flanged Joint	140 Degree F	12.1 Bar	33 Degree F	6"	Flanged Joint	€9,207.69	RFQ
A	957RPDA-OSY-GPM 2 1/2	Straight	2-1/2"	Grooved Joint	110 Degree F	12.06 Bar	33 Degree F	2-1/2"	Grooved Joint	€4,407.02	RFQ
A	957RPDA-OSY-GPM 3	Straight	3"	Grooved Joint	110 Degree F	12.06 Bar	33 Degree F	3"	Grooved Joint	€4,893.18	RFQ
A	957RPDA-OSY-GPM 10	Straight	10"	Grooved Joint	110 Degree F	12.06 Bar	33 Degree F	10"	Grooved Joint	€17,734.20	RFQ
B	957RPDA-OSY-LM 10	Straight	10"	Grooved Joint	110 Degree F	12.06 Bar	33 Degree F	10"	Grooved Joint	€17,635.61	RFQ
C	957RPDA-DOSY-CFM 6	Straight	6"	Grooved Joint	110° F	175 PSI	33° F	6"	Grooved Joint	€10,406.46	RFQ
A	957RPDA-DOSY-GPM 8	Straight	8"	Grooved Joint	110 Degree F	12.06 Bar	33 Degree F	8"	Grooved Joint	€15,171.22	RFQ
B	957RPDA-OSY-LM 4	Straight	4"	Grooved Joint	110 Degree F	12.06 Bar	33 Degree F	4"	Grooved Joint	€6,293.60	RFQ
C	957RPDA-DOSY-CFM 4	Straight	4"	Grooved Joint	110° F	175 PSI	33° F	4"	Grooved Joint	€7,223.07	RFQ
C	957RPDA-DOSY-GPM 4	Straight	4"	Grooved Joint	110° F	175 PSI	33° F	4"	Grooved Joint	€7,223.07	RFQ
C	957RPDA-DOSY-CFM 8	Straight	8"	Grooved Joint	110° F	175 PSI	33° F	8"	Grooved Joint	€15,171.22	RFQ

WATTS -

9D Series Dual Check Valves

A

B

Style	Model	Connection Type	Inlet Size	Outlet Size	Size	Price (ex. VAT)
A	9D-M2-3/4"	Fnpt	3/4"	3/4"	3/4"	€132.11
B	9D-M3-1/2"	FNPT Union	1/2"	1/2"	1/2"	€115.89

WATTS -