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 -

AMES Maxim Series M200 Double Check Valve Assemblies

StyleModelInlet ConnectionInlet SizeOutlet ConnectionPrice (inc. VAT)
AM200-DOSY 8Flanged Joint8"Flanged Joint£15,773.11
RFQ
AM200-OSY 10Flanged Joint10"Flanged Joint£27,020.58
RFQ
AM200-NRS 6Flanged Joint6"-£7,915.09
RFQ
AM200-NRS 4Flanged Joint4"-£4,923.93
RFQ
AM200-NRS 3Flanged Joint3"-£4,379.33
RFQ
AM200-OSY 6Flanged Joint6"Flanged Joint£8,181.76
RFQ
AM200-NRS 10Flanged Joint10"-£21,744.75
RFQ
AM200-OSY 8Flanged Joint8"Flanged Joint£15,773.11
RFQ
AM200-OSY 3Flanged Joint3"Flanged Joint£4,407.42
RFQ
AM200-NRS 8Flanged Joint8"-£15,604.19
RFQ
AM200-OSY 4Flanged Joint4"Flanged Joint£5,206.07
RFQ
AM200-OSY 2 1/2Flanged Joint2 1/2"Flanged Joint£4,198.26
RFQ
BM200-BFG 4Grooved Joint4"Grooved Joint£6,292.49
RFQ
BM200-BFG 2 1/2Grooved Joint2 1/2"Grooved Joint£5,176.61
RFQ
BM200-BFG 3Grooved Joint3"Grooved Joint£5,409.61
RFQ
BM200-BFG 6Grooved Joint6"Grooved Joint£9,614.89
RFQ
AM200-NRS 2 1/2Swivel Joint2 1/2"-£4,041.05
RFQ
WATTS -

Reduced Pressure Zone Backflow Preventer

Reduced pressure zone backflow preventers by Watts are used to prevent the reverse flow of liquids caused by backsiphonage or back pressure in a plumbing system. They also eliminate the chances of entry of contaminants back into potable water supply lines. These Watts backflow preventers feature a compact, modular design for installation in tight spaces and their single-cover, top-entry facility allows easy accessibility for maintenance purposes. They come equipped with replaceable seats and seat discs, and do not require any special tools for servicing. Raptor Supplies offers a wide range of Watts reduced pressure backflow preventers in different connection types and body materials.

StyleModelTemp. RangeWidthBody MaterialConnectionItemLengthMax. Temp.SizePrice (inc. VAT)
A1 1/2 LF009M2-QT-S----Backflow Preventer---£2,095.75
B1/2 LF009-QT-S----Backflow Preventer---£826.14
C3/4 009M3-QT----Backflow Preventer---£1,043.40
D1/2 009-QT----Backflow Preventer---£783.81
E1 1/4 009M2-QT----Backflow Preventer---£1,867.34
E1 1/2 009M2-QT----Backflow Preventer---£2,023.30
F1/2 LF009-QT-PRESS----Assembly---£818.85
G3" LF009-NRS----Gate---£6,856.13
H1 SS009-QT----Backflow Preventer---£5,997.44
A1 1/4 LF009M2-QT-S----Backflow Preventer---£1,973.00
F3/4 LF009M3-QT-PRESS----Assembly---£899.43
E2 009M2-QT----Backflow Preventer---£2,320.97
I3/4 SS009M3-QT----Backflow Preventer---£5,669.88
A2 LF009M2-QT-S----Backflow Preventer---£2,425.11
E1 1/4 LF009M2-QT----Backflow Preventer---£1,759.45
E1 009M2-QT----Backflow Preventer---£1,191.73
F1 LF009M2-QT-PRESS----Assembly---£1,010.84
J3/4 LF825YA-QT RP32 Degrees to 140 Degrees F4.12"Lead Free BronzeNPTReduced Press. Zone Assembly12"140 Degrees F3/4"£1,118.84
K957 OSY 633 Degrees F10.5"Stainless SteelFlangedReduced Press. Zone Assembly50"140 Degree F6£10,424.16
WATTS -

Anti-Siphon Backflow Preventer

StyleModelInlet SizeOutlet SizeBody MaterialLengthMax. PressureMax. Temp.ConnectionSizePrice (inc. VAT)
A1/2 LF 008PCQT-1/2"--Lead Free Brass5.75"150 psi180 Degrees FIPS1/2"£833.49
A1 LF 008PCQT-1"--Lead Free Brass7.5"150 psi180 Degrees FIPS1"£830.63
B3/4 LF 800M4QT3/4"--Lead Free Brass-150 psi140 Degrees FFIP3/4"£287.92
A3/4 LF 008PCQT-3/4"--Lead Free Brass7"150 psi180 Degrees FIPS3/4"£777.84
B1 LF 800M4QT-1"--Lead Free Brass-150 psi140 Degrees FFIP1"£289.92
C800M4QT-1"1"1"Bronze5.375"180 psi140 Degree FNPT1"£208.04
D800M4QT3/4"3/4"3/4"Bronze5"180 psi140 Degree FNPT3/4"£234.23
WATTS -

Double Check Valve Assemblies

StyleModelPrice (inc. VAT)
A774-OSY£4,202.00
BLF709-NRS£5,460.37
CLF719-QT-S£1,335.19
D774-NRS£5,292.31
ELF709-OSY£22,798.17
F21/2 757 OSY£5,011.21
StyleModelInlet SizeMax. Temp.Price (inc. VAT)
ALFC500Z-OSY-CFM 2 1/22 1/2"110° F£5,743.67
RFQ
ALFC500Z-OSY-GPM 2 1/22 1/2"110° F£5,743.67
RFQ
ALFC500Z-DOSY-G 2 1/22 1/2"110° F£6,489.00
RFQ
ALFC500Z-DOSY-C 2 1/22 1/2"110° F£6,489.00
RFQ
ALFC500Z-OSY-GPM 33"110° F£6,390.73
RFQ
ALFC500Z-OSY-CFM 33"110° F£6,390.73
RFQ
ALFC500Z-DOSY-C 33"110° F£7,217.47
RFQ
ALFC500Z-DOSY-G 33"110° F£7,217.47
RFQ
ALFC500Z-DOSY-C 44"110° F£8,477.93
RFQ
ALFC500Z-DOSY-G 44"110° F£8,477.93
RFQ
ALFC500Z-OSY-CFM 44"110° F£7,502.43
RFQ
ALFC500Z-DOSY-C 66"140° F£12,563.92
RFQ
ALFC500Z-OSY-CFM 66"110° F£11,122.39
RFQ
ALFC500Z-OSY-CFM 88"110° F£19,332.32
RFQ
ALFC500Z-DOSY-C 88"140° F£19,332.32
RFQ
WATTS -

Backflow Preventer Assemblies

StyleModelBackflow Preventer TypeBody MaterialDisc MaterialInlet SizeInlet Thread TypeMax. Temp.Seat MaterialPrice (inc. VAT)
ALF2000B-LBV 1Double Check Valve AssemblyLead Free Copper Silicon AlloyRubber1"FPT140° FRubber£483.50
RFQ
B919-LF 1/2Reduced Pressure Zone AssemblyBronzeSilicone1/2"NPT180° FPolymer£487.74
RFQ
WATTS -

Ames LF4000B Series Reduced Pressure Zone Assemblies

StyleModelInlet SizePrice (inc. VAT)
ALF4000BM2 1 1/21 1/2"£1,614.18
RFQ
BLF4000BM2-LBV 1 1/21 1/2"£1,294.86
RFQ
CLF4000BM2 1 1/41 1/4"£1,493.46
RFQ
ALF4000BM2 11"£952.38
RFQ
DLF4000B 1/21/2"£606.38
RFQ
ALF4000BM2 22"£1,857.00
RFQ
ELF4000BM2-LBV 22"£1,491.85
RFQ
FLF4000BM2 3/43/4"£807.80
RFQ
WATTS -

AMES Colt Series LFC300N Double Check Detector Assemblies

StyleModelInlet ConnectionInlet SizeOutlet ConnectionPrice (inc. VAT)
ALFC300N-DOSY-C 6Flanged Joint6"Flanged Joint£9,721.58
RFQ
ALFC300N-DOSY-G 3Flanged Joint3"Flanged Joint£6,434.24
RFQ
BLFC300N-DOSY-LM 8Flanged Joint8"Flanged Joint£14,738.15
RFQ
ALFC300N-DOSY-G 10Flanged Joint10"Flanged Joint£23,220.84
RFQ
ALFC300N-DOSY-G 2 1/2Flanged Joint2 1/2"Flanged Joint£5,830.68
RFQ
ALFC300N-DOSY-C 8Flanged Joint8"Flanged Joint£14,857.45
RFQ
BLFC300N-DOSY-LM 6Flanged Joint6"Flanged Joint£9,588.21
RFQ
ALFC300N-DOSY-G 4Flanged Joint4"Flanged Joint£7,508.05
RFQ
ALFC300N-DOSY-C 2 1/2Flanged Joint2 1/2"Flanged Joint£5,830.68
RFQ
ALFC300N-DOSY-C 3Flanged Joint3"Flanged Joint£6,434.24
RFQ
ALFC300N-DOSY-C 4Flanged Joint4"Flanged Joint£7,508.05
RFQ
BLFC300N-DOSY-LM 4Flanged Joint4"Flanged Joint£7,373.29
RFQ
BLFC300N-DOSY-LM 2 1/2Flanged Joint2 1/2"Flanged Joint£5,698.75
RFQ
BLFC300N-DOSY-LM 3Flanged Joint3"Flanged Joint£6,298.11
RFQ
ALFC300N-DOSY-G 8Flanged Joint8"Flanged Joint£14,857.45
RFQ
BLFC300N-DOSY-LM 10Flanged Joint10"Flanged Joint£23,102.00
RFQ
CLFC300N-BFG-LM 3Grooved Joint3"Grooved Joint£5,973.85
RFQ
WATTS -

Double Check Backflow Preventers

StyleModelItemPrice (inc. VAT)
A1 1/2 007M2-QTBackflow Preventer£1,265.70
B1/2 007-QTBackflow Preventer£503.35
C1 1/4 LF007M2-QTBackflow Preventer£1,177.83
C1 LF007M1-QTBackflow Preventer£525.28
D1/2 LF007-QT-SBackflow Preventer£666.05
E3/4 LF007M3-QTBackflow Preventer£478.53
F1/2 LF007-QTBackflow Preventer£491.13
G2 LF007M1-QTBackflow Preventer£1,456.70
A1 1/4 007M2-QTBackflow Preventer£1,087.42
A1 1/2 LF007M2-QT-SBackflow Preventer£1,710.80
C1 1/2 LF007M2-QTBackflow Preventer£1,325.68
H1/2 LF007-QT-PRESSDouble Check Valve Assembly£413.54
H1 LF007M1-QT-PRESSDouble Check Valve Assembly£666.05
H3/4 LF007M3-QT-PRESSDouble Check Valve Assembly£556.25
WATTS -

Dual Check Backflow Preventers

StyleModelItemPrice (inc. VAT)
A3/8 SD2-MNBackflow Preventer£290.36
B1 912HPBackflow Preventer£1,664.55
C3/8 SD2-FNBackflow Preventer£348.44
D3/4X3/4 LF7RU2-U2Backflow Preventer£202.46
E3/8 SD3-MNBackflow Preventer£508.42
E3/8 SD3-FNBackflow Preventer£542.32
F1/2 LFN9-CBackflow Preventer£627.26
G3/8 LF7CBackflow Preventer£411.35
H1/2X1/2 LF7RU2-U2Backflow Preventer£195.98
I1X3/4 LF7R10-U2Backflow Preventer£194.21
J1X3/4 LF7RU4-3Backflow Preventer£196.56
K1X3/4 LF7R10-U3Backflow Preventer£218.37
L1 LF07SBackflow Preventer£650.10
M3/4 9DS-M2Backflow Preventer£210.01
N1X1 LF7R10-U2Backflow Preventer£175.46
O1 1/4X1 LF7 10-U2Backflow Preventer£399.13
P1/2 9DS-M3Backflow Preventer£209.96
Q3/4 9DM2-PRESSDual Check Valve£189.48
WATTS -

Double Check Valve Backflow Preventer Assemblies

StyleModelBody MaterialDisc MaterialInlet SizeItemMax. Temp.Min. Temp.Seat MaterialPrice (inc. VAT)
A200-LBV 2BronzeSilicone2"Double Check Valve Assembly180° F33° FRubber£830.27
RFQ
B870V-4-DC-LG-DIN-N&VDuctile IronEPDM4"Reduced Press. Zone Assembly140° F32° FStainless Steel£3,113.26
RFQ
BC200N-DOSY 8Stainless Steel-8"Double Check Valve Assembly140° F33° FRubber£12,841.85
RFQ
WATTS -

919 Series Reduced Pressure Zone Assemblies

StyleModelBody PatternInlet SizeOutlet SizeSeat MaterialTypePrice (inc. VAT)
A919-QT 1 1/4Inline1 1/4"1-1/4"Engineered PlasticValve to Accessory£912.08
RFQ
A919-QT 1 1/2Inline1 1/2"1-1/2"Engineered PlasticValve to Accessory£974.43
RFQ
B919-QT-S 1/2Inline1/2"1/2"PolymerKit£459.61
RFQ
C919-QT-S 1 1/4Inline1 1/4"1-1/4"PolymerValve to Accessory£988.11
RFQ
D919-QT-S 2Inline2"2"Engineered PlasticValve to Accessory£1,178.23
RFQ
A919-QT 2Inline2"2"Engineered PlasticValve to Accessory£1,002.23
RFQ
A919-QT 1/2Inline1/2"1/2"Engineered PlasticKit£423.36
RFQ
E919-QT-S 1Inline1"1"PolymerValve to Accessory£548.46
RFQ
F919-AQT 1 1/2N Pattern1 1/2"--Valve to Accessory£1,501.87
RFQ
F919-AQT 3/4N Pattern3/4"-PolymerValve to Accessory£879.37
RFQ
F919-AQT 1/2N Pattern1/2"-PolymerKit£763.57
RFQ
F919-AQT 1 1/4N Pattern1 1/4"-PolymerValve to Accessory£1,341.89
RFQ
F919-AQT 2N Pattern2"-PolymerValve to Accessory£1,865.43
RFQ
StyleModelInlet SizeMax. Temp.Price (inc. VAT)
ALFC500N-OSY-CFM 2 1/22 1/2"110° F£5,743.67
RFQ
ALFC500N-DOSY-C 2 1/22 1/2"110° F£6,489.00
RFQ
ALFC500N-DOSY-G 2 1/22 1/2"110° F£6,489.00
RFQ
ALFC500N-DOSY-LM 2 1/22 1/2"110° F£6,361.27
RFQ
ALFC500N-DOSY-LM 33"110° F£7,096.76
RFQ
ALFC500N-DOSY-C 33"110° F£7,217.47
RFQ
ALFC500N-DOSY-G 33"110° F£7,217.47
RFQ
ALFC500N-OSY-GPM 44"110° F£7,502.43
RFQ
ALFC500N-DOSY-C 44"110° F£8,477.93
RFQ
ALFC500N-OSY-CFM 44"110° F£7,502.43
RFQ
ALFC500N-DOSY-LM 44"110° F£8,353.01
RFQ
ALFC500N-DOSY-G 44"110° F£8,477.93
RFQ
ALFC500N-OSY-GPM 66"110° F£11,122.39
RFQ
ALFC500N-DOSY-C 66"140° F£12,563.92
RFQ
ALFC500N-DOSY-G 66"140° F£12,563.92
RFQ
ALFC500N-DOSY-LM 66"140° F£12,440.40
RFQ
ALFC500N-OSY-CFM 66"110° F£11,122.39
RFQ
ALFC500N-OSY-GPM 88"110° F£19,332.32
RFQ
ALFC500N-DOSY-C 88"140° F£19,332.32
RFQ
ALFC500N-DOSY-LM 88"140° F£19,220.65
RFQ
ALFC500N-DOSY-G 88"140° F£19,332.32
RFQ
ALFC500N-OSY-CFM 1010"110° F£28,905.02
RFQ
ALFC500N-OSY-GPM 1010"110° F£28,905.02
RFQ
WATTS -

Ames Colt Series C500 Reduced Pressure Detector Assemblies

StyleModelBody PatternInlet ConnectionInlet SizeOutlet ConnectionPrice (inc. VAT)
AC500-OSY-LM 3StraightFlanged Joint3"Flanged Joint£5,338.00
RFQ
AC500-DOSY-LM 8StraightFlanged Joint8"Flanged Joint£16,640.71
RFQ
BC500-DOSY-C 4StraightFlanged Joint4"Flanged Joint£7,244.15
RFQ
BC500-DOSY-G 8StraightFlanged Joint8"Flanged Joint£16,738.06
RFQ
AC500-OSY-LM 4StraightFlanged Joint4"Flanged Joint£6,313.54
RFQ
BC500-DOSY-C 2 1/2StraightFlanged Joint2 1/2"Flanged Joint£5,555.57
RFQ
BC500-DOSY-C 3StraightFlanged Joint3"Flanged Joint£6,140.90
RFQ
BC500-DOSY-C 8StraightFlanged Joint8"Flanged Joint£16,738.06
RFQ
BC500-DOSY-G 6StraightFlanged Joint6"Flanged Joint£10,633.91
RFQ
AC500-OSY-LM 8StraightFlanged Joint8"Flanged Joint£16,640.71
RFQ
BC500-DOSY-C 6StraightFlanged Joint6"Flanged Joint£10,633.91
RFQ
AC500-OSY-LM 10StraightFlanged Joint10"Flanged Joint£23,777.77
RFQ
BC500-DOSY-G 2 1/2StraightFlanged Joint2 1/2"Flanged Joint£5,555.57
RFQ
BC500-DOSY-G 3StraightFlanged Joint3"Flanged Joint£6,140.90
RFQ
AC500-OSY-LM 2 1/2StraightFlanged Joint2 1/2"Flanged Joint£4,822.87
RFQ
BC500-DOSY-G 4StraightFlanged Joint4"Flanged Joint£7,244.15
RFQ
AC500-OSY-LM 6StraightFlanged Joint6"Flanged Joint£9,315.91
RFQ
AC500Z-BFG-LM 4Z PatternGrooved Joint4"Grooved Joint£7,916.49
RFQ
AC500Z-BFG-LM 3Z PatternGrooved Joint3"Grooved Joint£6,783.76
RFQ
AC500Z-OSY-LM 4Z PatternFlanged Joint4"Flanged Joint£6,974.65
RFQ
AC500Z-DOSY-LM 8Z PatternFlanged Joint8"Flanged Joint£18,133.97
RFQ
AC500Z-DOSY-C 8Z PatternFlanged Joint8"Flanged Joint£18,237.06
RFQ
AC500Z-OSY-LM 10Z PatternFlanged Joint10"Flanged Joint£27,163.75
RFQ
AC500Z-OSY-LM 3Z PatternFlanged Joint3"Flanged Joint£5,923.33
RFQ
AC500Z-BFG-LM 2 1/2Z PatternGrooved Joint2 1/2"Grooved Joint£6,125.46
RFQ
WATTS -

957RPDA Series Reduced Pressure Zone Assemblies

StyleModelMin. Temp.Outlet TypeBody StyleOutlet SizeInlet SizeTypeInlet TypeMax. Temp.Price (inc. VAT)
A957RPDA-DOSY-LM 433° FGrooved JointStraight4"4"KitGrooved Joint110° F£7,225.90
RFQ
B957RPDA-DOSY-GPM 2 1/233° FGrooved JointStraight2-1/2"2 1/2"KitGrooved Joint110° F£5,061.49
RFQ
B957RPDA-DOSY-CFM 833° FGrooved JointStraight8"8"KitGrooved Joint110° F£15,418.92
RFQ
A957RPDA-DOSY-LM 333° FGrooved JointStraight3"3"KitGrooved Joint110° F£5,502.24
RFQ
A957RPDA-DOSY-LM 2 1/233° FGrooved JointStraight2-1/2"2 1/2"KitGrooved Joint110° F£4,947.81
RFQ
B957RPDA-DOSY-GPM 633° FGrooved JointStraight6"6"KitGrooved Joint110° F£10,576.36
RFQ
B957RPDA-DOSY-GPM 433° FGrooved JointStraight4"4"KitGrooved Joint110° F£7,341.00
RFQ
B957RPDA-DOSY-GPM 333° FGrooved JointStraight3"3"KitGrooved Joint110° F£5,617.32
RFQ
B957RPDA-DOSY-CFM 333° FGrooved JointStraight3"3"KitGrooved Joint110° F£5,617.32
RFQ
B957RPDA-DOSY-CFM 2 1/233° FGrooved JointStraight2-1/2"2 1/2"KitGrooved Joint110° F£5,061.49
RFQ
A957RPDA-DOSY-LM 633° FGrooved JointStraight6"6"KitGrooved Joint110° F£10,462.68
RFQ
B957RPDA-DOSY-CFM 633° FGrooved JointStraight6"6"KitGrooved Joint110° F£10,576.36
RFQ
B957RPDA-DOSY-CFM 433° FGrooved JointStraight4"4"KitGrooved Joint110° F£7,341.00
RFQ
C957RPDA-OSY-GPM 633 Degree FFlanged JointInline6"6"Valve to AccessoryFlanged Joint140 Degree F£9,358.02
RFQ
A957RPDA-DOSY-LM 833 Degree FGrooved JointStraight8"8"Valve to AccessoryGrooved Joint110 Degree F£15,317.84
RFQ
C957RPDA-DOSY-GPM 833 Degree FGrooved JointStraight8"8"Valve to AccessoryGrooved Joint110 Degree F£15,418.92
RFQ
D957RPDA-OSY-LM 2 1/233 Degree FGrooved JointStraight2-1/2"2-1/2"Valve to AccessoryGrooved Joint110 Degree F£4,377.92
RFQ
D957RPDA-OSY-LM 1033 Degree FGrooved JointStraight10"10"Valve to AccessoryGrooved Joint110 Degree F£17,923.54
RFQ
D957RPDA-OSY-LM 833 Degree FGrooved JointStraight8"8"Valve to AccessoryGrooved Joint110 Degree F£15,317.84
RFQ
D957RPDA-OSY-LM 633 Degree FGrooved JointStraight6"6"Valve to AccessoryGrooved Joint110 Degree F£9,259.77
RFQ
D957RPDA-OSY-LM 433 Degree FGrooved JointStraight4"4"Valve to AccessoryGrooved Joint110 Degree F£6,396.35
RFQ
C957RPDA-OSY-GPM 833 Degree FFlanged JointInline8"8"Valve to AccessoryFlanged Joint140 Degree F£15,418.92
RFQ
C957RPDA-OSY-GPM 1033 Degree FGrooved JointStraight10"10"Valve to AccessoryGrooved Joint110 Degree F£18,023.74
RFQ
C957RPDA-OSY-GPM 433 Degree FFlanged JointInline4"4"Valve to AccessoryFlanged Joint140 Degree F£6,497.41
RFQ
C957RPDA-OSY-GPM 333 Degree FGrooved JointStraight3"3"Valve to AccessoryGrooved Joint110 Degree F£4,973.07
RFQ
WATTS -

957ZRPDA Series Reduced Pressure Detector Assemblies

StyleModelInlet SizeMax. Temp.Max. Working PressureMin. Temp.Outlet SizeTypeValve TypePrice (inc. VAT)
A957ZRPDA-DOSY-GPM 2 1/22 1/2"110° F175 PSI33° F2-1/2"KitOutside Stem And Yoke Gate Valve£6,714.97
RFQ
A957ZRPDA-DOSY-LM 2 1/22 1/2"110° F175 PSI33° F2-1/2"KitOutside Stem And Yoke Gate Valve£6,597.09
RFQ
A957ZRPDA-DOSY-CFM 2 1/22 1/2"110° F175 PSI33° F2-1/2"KitOutside Stem And Yoke Gate Valve£6,714.97
RFQ
B957ZRPDA-BFG-LM 2 1/22 1/2"110° F175 PSI33° F2-1/2"KitGear Operated Butterfly Valve£6,171.77
RFQ
B957ZRPDA-OSY-LM 2 1/22 1/2"110° F175 PSI33° F2-1/2"KitOutside Stem And Yoke Gate Valve£5,837.72
RFQ
C957ZRPDA-OSY-GPM 2 1/22 1/2"110° F175 PSI33° F2-1/2"KitOutside Stem And Yoke Gate Valve£5,944.39
RFQ
B957ZRPDA-OSY-CFM 2 1/22-1/2"110 Degree F12.06 Bar33 Degree F2-1/2"Valve to AccessoryOutside Stem And Yoke Gate Valve£5,944.39
RFQ
B957ZRPDA-BFG-CFM 2 1/22-1/2"110 Degree F12.06 Bar33 Degree F2-1/2"Valve to AccessoryGear Operated Butterfly Valve£6,277.05
RFQ
B957ZRPDA-BFG-GPM 2 1/22-1/2"110 Degree F12.06 Bar33 Degree F2-1/2"Valve to AccessoryGear Operated Butterfly Valve£6,277.05
RFQ
C957ZRPDA-OSY-GPM 33"110° F175 PSI33° F3"KitOutside Stem And Yoke Gate Valve£6,462.33
RFQ
B957ZRPDA-BFG-CFM 33"110 Degree F12.06 Bar33 Degree F3"Valve to AccessoryGear Operated Butterfly Valve£6,796.39
RFQ
B957ZRPDA-OSY-LM 33"110° F175 PSI33° F3"KitOutside Stem And Yoke Gate Valve£6,355.66
RFQ
B957ZRPDA-OSY-CFM 33"110 Degree F12.06 Bar33 Degree F3"Valve to AccessoryOutside Stem And Yoke Gate Valve£6,462.33
RFQ
B957ZRPDA-BFG-LM 33"110° F175 PSI33° F3"KitGear Operated Butterfly Valve£6,691.13
RFQ
A957ZRPDA-DOSY-LM 33"110° F175 PSI33° F3"KitOutside Stem And Yoke Gate Valve£7,183.81
RFQ
A957ZRPDA-DOSY-GPM 33"110° F175 PSI33° F3"KitOutside Stem And Yoke Gate Valve£7,300.30
RFQ
A957ZRPDA-DOSY-CFM 33"110° F175 PSI33° F3"KitOutside Stem And Yoke Gate Valve£7,300.30
RFQ
B957ZRPDA-BFG-GPM 33"110 Degree F12.06 Bar33 Degree F3"Valve to AccessoryGear Operated Butterfly Valve£6,796.39
RFQ
C957ZRPDA-OSY-GPM 44"110° F175 PSI33° F4"KitOutside Stem And Yoke Gate Valve£8,901.83
RFQ
B957ZRPDA-OSY-LM 44"110° F175 PSI33° F4"KitOutside Stem And Yoke Gate Valve£8,796.55
RFQ
A957ZRPDA-DOSY-CFM 44"110° F175 PSI33° F4"KitOutside Stem And Yoke Gate Valve£10,059.84
RFQ
B957ZRPDA-BFG-CFM 44"110 Degree F12.06 Bar33 Degree F4"Valve to AccessoryGear Operated Butterfly Valve£9,234.51
RFQ
D957ZRPDA-OSY-CFM 44"110° F175 PSI33° F4"KitOutside Stem And Yoke Gate Valve£8,901.83
RFQ
B957ZRPDA-BFG-GPM 44"110 Degree F12.06 Bar33 Degree F4"Valve to AccessoryGear Operated Butterfly Valve£9,234.51
RFQ
A957ZRPDA-DOSY-LM 44"110° F175 PSI33° F4"KitOutside Stem And Yoke Gate Valve£9,937.73
RFQ
WATTS -

LF757DCDA Series Double Check Detector Assemblies

StyleModelValve TypeMfr. SeriesBody PatternInlet ConnectionInlet SizeInlet TypeMax. Temp.Max. Working PressurePrice (inc. VAT)
ALF757DCDA-BFG-CFM 3Gear Operated Butterfly ValveLF757DCDA--3"Grooved Joint140 Degree F12.1 Bar£5,166.79
RFQ
B757-DCDA BFGXPIV-GPM 3Gear Operated Butterfly Valve757DCDAStraightGrooved Joint3"Grooved Joint140° F175 PSI£18,576.38
RFQ
ALF757DCDA-BFG-GPM 4Gear Operated Butterfly ValveLF757DCDA--4"Grooved Joint140 Degree F12.1 Bar£5,957.02
RFQ
ALF757DCDA-BFG-CFM 2 1/2Gear Operated Butterfly ValveLF757DCDA--2-1/2"Grooved Joint140 Degree F12.1 Bar£4,640.40
RFQ
ALF757DCDA-BFG-GPM 3Gear Operated Butterfly ValveLF757DCDA--3"Grooved Joint140 Degree F12.1 Bar£5,366.09
RFQ
ALF757DCDA-BFG-CFM 8Gear Operated Butterfly ValveLF757DCDA--8"Grooved Joint140 Degree F12.1 Bar£15,808.91
RFQ
C757-DCDA BFGXPIV-GPM 8Gear Operated Butterfly Valve757DCDAStraightGrooved Joint8"Grooved Joint140° F175 PSI£50,008.04
RFQ
B757-DCDA BFGXPIV-CFM 8Gear Operated Butterfly Valve757DCDAStraightGrooved Joint8"Grooved Joint140° F175 PSI£50,008.04
RFQ
ALF757DCDA-BFG-GPM 2 1/2Gear Operated Butterfly ValveLF757DCDA--2-1/2"Grooved Joint140 Degree F12.1 Bar£4,640.40
RFQ
C757-DCDA BFGXPIV-CFM 3Gear Operated Butterfly Valve757DCDAStraightGrooved Joint3"Grooved Joint140° F175 PSI£18,576.38
RFQ
C757-DCDA BFGXPIV-CFM 6Gear Operated Butterfly Valve757DCDAStraightGrooved Joint6"Grooved Joint140° F175 PSI£29,684.98
RFQ
C757-DCDA BFGXPIV-GPM 6Gear Operated Butterfly Valve757DCDAStraightGrooved Joint6"Grooved Joint140° F175 PSI£29,684.98
RFQ
ALF757DCDA-BFG-CFM 4Gear Operated Butterfly ValveLF757DCDA--4"Grooved Joint140 Degree F12.1 Bar£6,780.95
RFQ
B757-DCDA BFGXPIV-CFM 4Gear Operated Butterfly Valve757DCDAStraightGrooved Joint4"Grooved Joint140° F175 PSI£21,588.70
RFQ
B757-DCDA BFGXPIV-GPM 4Gear Operated Butterfly Valve757DCDAStraightGrooved Joint4"Grooved Joint140° F175 PSI£21,588.70
RFQ
ALF757DCDA-BFG-CFM 6Gear Operated Butterfly ValveLF757DCDA--6"Grooved Joint140 Degree F12.1 Bar£9,815.60
RFQ
ALF757DCDA-BFG-GPM 6Gear Operated Butterfly ValveLF757DCDA--6"Grooved Joint140 Degree F12.1 Bar£7,781.75
RFQ
DLF757DCDA-BFG-LM 4Gear Operated Butterfly ValveLF757DCDAInlineGrooved Joint4"Grooved Joint140° F175 PSI£6,828.68
RFQ
DLF757DCDA-BFG-GPM 8Gear Operated Butterfly ValveLF757DCDAInlineGrooved Joint8"Grooved Joint140° F175 PSI£15,808.91
RFQ
ELF757DCDA-OSY-CFM 4Outside Stem And Yoke Gate ValveLF757DCDA--4"Flanged Joint140 Degree F12.1 Bar£4,698.53
RFQ
FLF757DCDA-OSYXPIV-GPM 6Outside Stem And Yoke Gate ValveLF757DCDA--6"Flanged Joint140 Degree F12.1 Bar£8,966.41
RFQ
ELF757DCDA-OSY-GPM 8Outside Stem And Yoke Gate ValveLF757DCDA--8"Flanged Joint140 Degree F12.1 Bar£11,012.47
RFQ
GLF757DCDA-DOSY-GPM 6Outside Stem And Yoke Gate ValveLF757DCDAInlineFlanged Joint6"Flanged Joint140° F175 PSI£8,509.13
RFQ
ELF757DCDA-OSY-CFM 2 1/2Outside Stem And Yoke Gate ValveLF757DCDA--2-1/2"Flanged Joint140 Degree F12.1 Bar£5,044.96
RFQ
HLF757DCDA-DOSY-GPM 4Outside Stem And Yoke Gate ValveLF757DCDAInlineFlanged Joint4"Flanged Joint140° F175 PSI£4,698.53
RFQ
WATTS -

Ames Colt Series LFC500 Reduced Pressure Detector Assemblies

StyleModelInlet SizeMax. Temp.Price (inc. VAT)
ALFC500-OSY-CFM 2 1/22 1/2"110° F£5,217.31
RFQ
ALFC500-DOSY-C 2 1/22 1/2"110° F£5,892.46
RFQ
BLFC500-DOSY-LM 2 1/22 1/2"110° F£5,110.62
RFQ
ALFC500-DOSY-G 2 1/22 1/2"110° F£5,892.46
RFQ
ALFC500-OSY-GPM 2 1/22 1/2"110° F£5,217.31
RFQ
ALFC500-OSY-CFM 33"110° F£5,764.73
RFQ
ALFC500-OSY-GPM 33"110° F£5,764.73
RFQ
ALFC500-DOSY-G 33"110° F£6,510.06
RFQ
ALFC500-DOSY-C 33"110° F£6,510.06
RFQ
BLFC500-DOSY-LM 33"110° F£4,591.28
RFQ
ALFC500-OSY-CFM 44"110° F£6,796.39
RFQ
BLFC500-DOSY-LM 44"110° F£7,559.98
RFQ
ALFC500-OSY-GPM 44"110° F£6,796.39
RFQ
ALFC500-DOSY-C 44"110° F£7,677.87
RFQ
ALFC500-OSY-GPM 66"110° F£9,978.43
RFQ
BLFC500-DOSY-LM 66"110° F£11,156.08
RFQ
ALFC500-DOSY-C 66"110° F£11,275.38
RFQ
ALFC500-OSY-CFM 66"110° F£9,978.43
RFQ
ALFC500-DOSY-C 88"140° F£17,743.12
RFQ
ALFC500-DOSY-G 88"140° F£17,743.12
RFQ
ALFC500-OSY-CFM 88"110° F£17,743.12
RFQ
BLFC500-DOSY-LM 88"140° F£17,638.62
RFQ
ALFC500-OSY-GPM 88"110° F£17,743.12
RFQ
ALFC500-OSY-GPM 1010"110° F£25,311.13
RFQ
ALFC500-OSY-CFM 1010"110° F£25,311.13
RFQ
WATTS -

757N Series Double Check Valve Assemblies

StyleModelValve TypeMin. Temp.Backflow Preventer TypeInlet SizeInlet TypeMax. Temp.Max. Working PressureMfr. SeriesPrice (inc. VAT)
A757N-BFG 8Gear Operated Butterfly Valve33 Degree F-8"Grooved Joint140 Degree F12.1 Bar757£13,129.57
RFQ
B757N-BFG 2 1/2Gear Operated Butterfly Valve33° FDouble Check Valve Assembly2 1/2"Flanged Joint140° F175 PSI757£5,003.94
RFQ
B757N-BFG 3Gear Operated Butterfly Valve33° FDouble Check Valve Assembly3"Grooved Joint140° F175 PSI757£5,347.82
RFQ
B757N-BFG 4Gear Operated Butterfly Valve33° FDouble Check Valve Assembly4"Grooved Joint140° F175 PSI757£6,514.26
RFQ
C757NDCDA-BFG-CFMGear Operated Butterfly Valve33 Degree F-8"Grooved Joint140 Degree F12.1 Bar757DCDA£20,927.25
RFQ
B757N-BFG 6Gear Operated Butterfly Valve33° FDouble Check Valve Assembly6"Flanged Joint140° F175 PSI757£10,231.07
RFQ
C757NDCDA-BFG-GPMGear Operated Butterfly Valve33 Degree F-8"Grooved Joint140 Degree F12.1 Bar757DCDA£20,927.25
RFQ
B757N-NRS 10Non Rising Stem Gate Valve33° FDouble Check Valve Assembly10"Flanged Joint140° F175 PSI757£20,689.59
RFQ
D757N-DNRS 4Non Rising Stem Gate Valve33° FDouble Check Valve Assembly4"Flanged Joint140° F175 PSI757£13,196.94
RFQ
B757N-NRS 3Non Rising Stem Gate Valve33° FDouble Check Valve Assembly3"Flanged Joint140° F175 PSI757£4,674.11
RFQ
B757N-NRS 8Non Rising Stem Gate Valve33° FDouble Check Valve Assembly8"Flanged Joint140° F175 PSI757£17,300.74
RFQ
D757N-DNRS 3Non Rising Stem Gate Valve33° FDouble Check Valve Assembly3"Flanged Joint140° F175 PSI757£10,563.76
RFQ
B757N-NRS 2 1/2Non Rising Stem Gate Valve33° FDouble Check Valve Assembly2 1/2"Flanged Joint140° F175 PSI757£4,325.99
RFQ
D757N-DNRS 2 1/2Non Rising Stem Gate Valve33 Degree F-2-1/2"Flanged Joint140 Degree F12.1 Bar757£9,780.50
RFQ
B757N-NRS 4Non Rising Stem Gate Valve33° FDouble Check Valve Assembly4"Flanged Joint140° F175 PSI757£5,839.13
RFQ
B757N-NRS 6Non Rising Stem Gate Valve33° FDouble Check Valve Assembly6"Flanged Joint140° F175 PSI757£9,520.86
RFQ
E757N-DCDA-DOSY-GPM 3Outside Stem And Yoke Gate Valve33° FDouble Check Detector Assembly3"Flanged Joint140° F175 PSI757DCDA£8,381.10
RFQ
E757N-DCDA-DOSY-GPM 6Outside Stem And Yoke Gate Valve33° FDouble Check Detector Assembly6"Flanged Joint140° F175 PSI757DCDA£13,625.08
RFQ
B757N-OSY 3Outside Stem And Yoke Gate Valve33° FDouble Check Valve Assembly3"Flanged Joint140° F175 PSI757£5,019.38
RFQ
E757N-DCDA-DOSY-GPM 8Outside Stem And Yoke Gate Valve33° FDouble Check Detector Assembly8"Flanged Joint140° F175 PSI757DCDA£20,559.29
RFQ
D757N-DCDA-DOSY-LM 6Outside Stem And Yoke Gate Valve33° FDouble Check Detector Assembly6"Flanged Joint140° F175 PSI757DCDA£13,498.73
RFQ
E757N-DCDA-DOSY-GPM 4Outside Stem And Yoke Gate Valve33° FDouble Check Detector Assembly4"Flanged Joint140° F175 PSI757DCDA£9,810.00
RFQ
E757N-DCDA-DOSY-CFM 6Outside Stem And Yoke Gate Valve33° FDouble Check Detector Assembly6"Flanged Joint140° F175 PSI757DCDA£13,625.08
RFQ
B757N-OSY 6Outside Stem And Yoke Gate Valve33° FDouble Check Valve Assembly6"Flanged Joint140° F175 PSI757£9,890.00
RFQ
B757N-OSY 10Outside Stem And Yoke Gate Valve33° FDouble Check Valve Assembly10"Flanged Joint140° F175 PSI757£21,247.95
RFQ
WATTS -

850 Series Double Check Valve Assemblies

Watts 850 Series double check valve assemblies are used in plumbing & water supply systems to ensure water safety and prevent backflow. These assemblies protect the potable water supply from potential contaminants that could enter the system due to back-siphonage or backpressure. They have a dual-check valve configuration for double protection against backflow. These valve assemblies feature a modular design for quick inspections and repairs. They have bronze construction for structural rigidity and leakproof operations. These valve assemblies have silicone discs for improved sealing during operations and offer rough bronze finish to resist corrosion on exposed surfaces.

StyleModelInlet SizePrice (inc. VAT)
A850-QT 1 1/21 1/2"£610.59
RFQ
A850-QT 1 1/41 1/4"£574.85
RFQ
B850-QT 11"£302.07
RFQ
A850-QT 1/21/2"£253.54
RFQ
C850-QT 22"£726.36
RFQ
B850-QT 3/43/4"£268.94
RFQ
WATTS -

757DCDA Series Double Check Detector Assemblies

StyleModelMax. Working PressureOutlet SizeInlet ConnectionMin. Temp.Outlet ConnectionInlet SizeOutlet TypeValve TypePrice (inc. VAT)
A757DCDA-OSY-LM 812.1 Bar8"-33 Degree F-8"Flanged JointOutside Stem And Yoke Gate Valve£14,251.07
RFQ
A757DCDA-BFG-LM 612.1 Bar6"-33 Degree F-6"Grooved JointGear Operated Butterfly Valve£8,187.38
RFQ
A757DCDA-BFG-LM 812.1 Bar8"-33 Degree F-8"Grooved JointGear Operated Butterfly Valve£14,594.99
RFQ
A757DCDA-OSY-LM 312.1 Bar3"-33 Degree F-3"Flanged JointOutside Stem And Yoke Gate Valve£5,649.61
RFQ
B757DCDA-OSY-LM 612.1 Bar6"-33 Degree F-6"Flanged JointOutside Stem And Yoke Gate Valve£7,836.49
RFQ
B757DCDA-OSY-LM 412.1 Bar4"-33 Degree F-4"Flanged JointOutside Stem And Yoke Gate Valve£6,013.17
RFQ
A757DCDA-BFG-LM 312.1 Bar3"-33 Degree F-3"Grooved JointGear Operated Butterfly Valve£5,989.29
RFQ
A757DCDA-OSY-LM 1012.1 Bar10"-33 Degree F-10"Flanged JointOutside Stem And Yoke Gate Valve£16,801.05
RFQ
A757DCDA-OSY-LM 2 1/212.1 Bar2-1/2"-33 Degree F-2-1/2"Flanged JointOutside Stem And Yoke Gate Valve£5,295.91
RFQ
C757DCDA-BFG-GPM12.1 Bar8"-33 Degree F-8"Grooved JointGear Operated Butterfly Valve£14,705.88
RFQ
D757DCDA-OSY-GPM 612.1 Bar6"-33 Degree F-6"Flanged JointOutside Stem And Yoke Gate Valve£7,915.47
RFQ
C757DCDA-BFG-CFM12.1 Bar8"-33 Degree F-8"Grooved JointGear Operated Butterfly Valve£14,705.88
RFQ
A757DCDA-BFG-LM 412.1 Bar4"-33 Degree F-4"Grooved JointGear Operated Butterfly Valve£6,351.45
RFQ
A757DCDA-BFG-LM 2 1/212.1 Bar2-1/2"-33 Degree F-2-1/2"Grooved JointGear Operated Butterfly Valve£5,639.79
RFQ
E757DCDA-OSYXPIV-GPM 6175 PSI6"Flanged Joint33° FFlanged Joint6"Flanged JointOutside Stem And Yoke Gate Valve£8,341.78
RFQ
F757DCDA-BFG-CFM 2 1/2175 PSI2-1/2"Flanged Joint33° FGrooved Joint2 1/2"Grooved JointGear Operated Butterfly Valve£5,746.46
RFQ
G757DCDA-OSY-GPM 10175 PSI10"Flanged Joint33° FFlanged Joint10"Flanged JointOutside Stem And Yoke Gate Valve£16,909.87
RFQ
G757DCDA-OSY-GPM 8175 PSI8"Flanged Joint33° FFlanged Joint8"Flanged JointOutside Stem And Yoke Gate Valve£10,244.20
RFQ
F757DCDA-BFG-CFM 3175 PSI3"Flanged Joint33° FGrooved Joint3"Grooved JointGear Operated Butterfly Valve£6,097.39
RFQ
F757DCDA-BFG-CFM 6175 PSI6"Grooved Joint33° FGrooved Joint6"Grooved JointGear Operated Butterfly Valve£8,294.07
RFQ
F757DCDA-BFG-GPM 6175 PSI6"Flanged Joint33° FGrooved Joint6"Grooved JointGear Operated Butterfly Valve£8,294.07
RFQ
E757DCDA-OSYXPIV-CFM 4175 PSI4"Flanged Joint33° FFlanged Joint4"Flanged JointOutside Stem And Yoke Gate Valve£6,424.42
RFQ
G757DCDA-OSY-GPM 4175 PSI4"Flanged Joint33° FFlanged Joint4"Flanged JointOutside Stem And Yoke Gate Valve£4,370.73
RFQ
G757DCDA-OSY-GPM 2 1/2175 PSI2-1/2"Flanged Joint33° FFlanged Joint2 1/2"Flanged JointOutside Stem And Yoke Gate Valve£4,693.01
RFQ
G757DCDA-OSY-GPM 3175 PSI3"Flanged Joint33° FFlanged Joint3"Flanged JointOutside Stem And Yoke Gate Valve£4,812.65
RFQ
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Frequently Asked Questions

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.

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