WATTS Temperature And Pressure Relief Valves

ASME and ANSI approved relief valves to protect water heaters and hot-water storage tanks from high temperature (max. 250 degrees F) and pressure (max. 150 psi) levels. Available in bronze, lead-free brass & lead-free copper silicon alloy material

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WATTS -

Angle Connector Gas Shutoff Valves

StyleModelInlet SizePrice (inc. VAT)
A93-20321/2"£17.35
RFQ
B93-10323/8"£14.12
RFQ
C93-30425/8"£24.12
RFQ
WATTS -

Temperature and Pressure Relief Valves

StyleModelMfr. SeriesOutlet TypeBody MaterialOutlet SizeInlet SizeThermostat Probe LengthInlet TypeItemPrice (inc. VAT)
A240X6-125-210-1"-FNPTBronze1"1"-MNPTTemperature and Pressure Relief Valve£1,182.09
B3/4 40XL8 150210-------Pressure Relief Valve£387.49
C1/2 1XL- 8-150210-------Pressure Relief Valve£71.06
D3/4 100XL8 150/210-------Pressure Relief Valve£49.65
E3/4 LF100XL8 150/210-------Pressure Relief Valve£52.38
F3/4 LF L100XL 150-210-------Pressure Relief Valve£56.61
G1/2 LF1XL 150-210-------Pressure Relief Valve£82.38
H1 40XL7-150210-------Pressure Relief Valve£444.71
I1 LF 240X 125-------Temperature and Pressure Relief Valve£1,161.10
RFQ
J3/4 LF100XL 125-210-------Pressure Relief Valve£37.75
K1XL-150210 1/2--Bronze-1/2"4"-Temperature & Pressure Relief Valve£52.27
L1/2 LF1XL-8 150-210-------Pressure Relief Valve£93.60
M1 LF40XL 150/210-------Pressure Relief Valve£749.39
N1XL-8-150210--Bronze-1/2"8"-Temperature & Pressure Relief Valve£55.34
O1/2 1XL-150210-------Pressure Relief Valve£68.60
P3/4 100-DT-------Tube£16.70
Q3/4 LFSL100XL-150/210-------Pressure Relief Valve£105.39
R1L-2-1502101LFemale ThreadedBronze1/2"1/2"2"Male ThreadedTemperature and Pressure Relief Valve£54.96
S100DT100DT-PVC----Temperature and Pressure Relief Valve£13.35
TLF1X-L8 150-210 1/2LF1LFemale ThreadedLead Free Copper Silicon Alloy1/2"1/2"-Male ThreadedTemperature and Pressure Relief Valve£72.65
WATTS -

Temperature & Pressure Relief Valve, 150 psi

StyleModelBtuHOutlet SizeBody HeightInlet SizeInlet TypeMax. Temp.Body MaterialOutlet TypePrice (inc. VAT)
A1 LF140X6 150/2103,085,0001"5.5"1"FNPT210 Degrees FLead-Free BrassFNPT£320.43
BL100XL-3100,0003/4"4.25"3/4"MNPT210 Degrees FBronzeFNPT£24.45
CLL100XL100,0003/4"6.75"3/4"Male Threaded210 Degree FBrassFemale Threaded£40.44
D100XL-4100,0003/4"3.5"3/4"MNPT210 Degrees FBronzeFNPT£15.25
E3/4 LF LLL100XL105,0003/4"5.25"3/4"MNPT210 Degrees FBronzeFNPT£67.21
CLLL100XL105,0003/4"7.75"3/4"MNPT210 Degrees FBronzeFNPT£28.74
F3/4 LF 100XL-4105,0003/4"3.5"3/4"MNPT210 Degrees FBronzeFNPT£29.54
G3/4 LF LL100XL105,0003/4"4.75"3/4"MNPT210 Degrees FBronzeFNPT£32.89
H3/4 LF 40XL-5205,0003/4"5.625"3/4"MNPT210 Degrees FLead-Free BrassFNPT£233.24
I1"140XL-6670,0001"5.5"1"FNPT210 Degrees FBronzeFNPT£291.27
WATTS -

Temperature & Pressure Relief Valve, 125 psi

StyleModelBody HeightBody WidthBtuHInlet SizeOutlet SizeShank LengthPrice (inc. VAT)
A3/4 LF 40 L5.625"2.625"180,0003/4"3/4"Standard£307.38
B3/4 LF 40XL 1255.625"2.625"205,0003/4"3/4"Extended£195.22
B1 LF 40XL 1256.25"2.75"500,0001"1"Standard£607.62
WATTS -

Automatic Temperature Gas Shutoff Valves, 150 psi

StyleModelBody HeightShank LengthPrice (inc. VAT)
ALF210-5-M210.25"7/8"£609.09
BLFL210-5-M211 15/16"1.875"£543.93
CLFLLL210-5-M212 13/16"2.875"£707.94
WATTS -

LFN9 Series, Dual Check with Atmospheric Vent

StyleModelBody MaterialInlet SizeInlet TypeMax. Temp.Outlet SizeOutlet TypePrice (inc. VAT)
ALFNLF9Lead-Free Brass3/8"MNPT180 Degrees F3/8"FNPT£174.45
BLFN9-1/4"Lead Free Brass1/4"Female Threaded140 Degree F1/4"Female Threaded£114.52
BLFN9-3/8"Lead Free Brass3/8"Female Threaded140 Degree F3/8"Female Threaded£242.66
CLFN9C-1/4"Lead Free Brass1/4"Female Threaded140 Degree F1/4"Female Threaded£126.47
WATTS -

174A Series Water Boiler Pressure Relief Valves

StyleModelDischarge CapacityInlet SizeMax. Temp.Max. Working PressureOutlet SizeRelief PressurePrice (inc. VAT)
A174A-115 1 1/4-1-1/4"250 Degree F-1-1/4"115 Psi£1,043.05
A174A-115 3/4-3/4"250 Degree F-3/4"115 Psi£383.80
A174A-060 3/4-3/4"250 Degree F-3/4"60 Psi£303.62
A174A-145 1-1"250 Degree F-1"145 Psi£813.65
A174A-140 1-1"250 Degree F-1"140 Psi£813.65
A174A-130 3/4-3/4"250 Degree F-3/4"130 Psi£383.80
A174A-030 3/4-3/4"250 Degree F-3/4"30 Psi£205.75
A174A-045 3/4-3/4"250 Degree F-3/4"45 Psi£385.28
A174A-095 3/4-3/4"250 Degree F-3/4"95 Psi£311.73
B174A-35 1 1/22250000 btuh At 35 psi1 1/2"250° F25 psi1-1/2"35 Psi£1,509.66
B174A-036 1 1/22310000 btuh At 36 psi1 1/2"250° F26 psi1-1/2"36 Psi£1,509.66
B174A-050 1 1/42459000 btuh1 1/4"250° F38 psi1-1/4"50 Psi£1,019.23
B174A-0402490000 btuh At 40 psi1 1/2"250° F30 psi1-1/2"40 Psi£1,509.66
B174A-045 1 1/22720000 btuh At 45 psi1 1/2"250° F35 PSI1-1/2"45 Psi£1,509.66
B174A-050 1 1/22950000 btuh At 50 psi1 1/2"250° F38 psi1-1/2"50 Psi£1,509.66
B174A-65 1 1/43041000 btuh At 65 psi1 1/4"250° F49 psi1-1/4"65 Psi£1,093.05
B174A-55 1 1/23190000 btuh At 55 psi1 1/2"250° F41 psi1-1/2"55 Psi£1,509.66
B174A-060 1 1/23425000 btuh At 60 psi1 1/2"250° F45 psi1-1/2"60 Psi£1,509.66
B174A-65 1 1/23660000 btuh At 65 psi1 1/2"250° F49 psi1-1/2"65 Psi£1,509.66
B174A-70 1 1/23890000 btuh At 70 psi1 1/2"250° F53 psi1-1/2"70 Psi£1,509.66
B174A-90 1 1/44011000 btuh At 90 psi1 1/4"250° F68 psi1-1/4"90 Psi£1,093.05
B174A-075 1 1/24125000 btuh At 75 psi1 1/2"250° F56 psi1-1/2"75 Psi£1,509.66
B174A-80 1 1/24360000 btuh At 80 psi1 1/2"250° F60 psi1-1/2"80 Psi£1,509.66
B174A-1004399000 btuh At 100 psi1 1/4"250° F75 PSI1-1/4"100 Psi£1,019.23
B174A-85 1 1/24590000 btuh At 85 psi1 1/2"250° F64 psi1-1/2"85 Psi£1,509.66
WATTS -

740 Series Water Boiler Relief Valves

StyleModelDischarge CapacityInlet SizeMax. Temp.Max. Working PressureOutlet SizeRelief PressurePrice (inc. VAT)
A740-050 3/4-3/4"250 Degree F-1"50 Psi£202.74
A740-040 3/4-3/4"250 Degree F-1"40 Psi£480.37
A740-075 3/4-3/4"250 Degree F-1"75 Psi£194.42
B740-030 1 1/42105000 btuh1 1/4"250° F20 psi1-1/2"30 Psi£865.28
B740-030 1 1/22900000 btuh1 1/2"250° F20 psi2"30 Psi£998.10
B740-050 1 1/43075000 btuh1 1/4"250° F38 psi1-1/2"50 Psi£745.39
WATTS -

LF100XL Series Temperature and Pressure Relief Valves

StyleModelBody MaterialMax. Temp.Max. Working PressureMfr. SeriesRelief PressureRelief TemperatureShank LengthPrice (inc. VAT)
ALFSL100XL-150/210 3/4Bronze210 Degree F-LFSL100XL150 Psi-1 1/4"£81.47
BLF100XL-8 175-210 3/4Lead Free Copper Alloy--LF100XL175 Psi-1 3/16"£79.18
BLF100XL-8 100-210 3/4Lead Free Copper Alloy--LF100XL100 Psi-1 3/16"£83.03
CLF100XL4-Z11 150-180Lead Free Copper Alloy-150 psiLF100XL150 Psi180° F1 3/16"£76.87
DLF100XL 100-210 3/4Lead Free Copper Silicon Alloy210 Degree F-LF100XL100 Psi-1 1/8"£76.09
ELF100XL-Z11 100-180Lead Free Copper Silicon Alloy210° F75 PSILF100XL100 Psi210° F1 1/8"£76.87
CLF100XL-150210Lead Free Copper Silicon Alloy210° F113 psiLF100XL150 Psi210° F1 1/8"£32.61
BLF100XL-8 125-210 3/4Lead Free Copper Silicon Alloy210 Degree F-LF100XL125 psi-1 1/8"£79.18
DLF100XL 125-210 3/4Lead Free Copper Silicon Alloy210 Degree F-LF100XL125 psi-1 1/8"£43.45
DLF100XL 175-210 3/4Lead Free Copper Silicon Alloy210 Degree F-LF100XL175 Psi-1 1/8"£39.02
WATTS -

LFN240 Series Automatic Re Seating Temperature And Pressure Relief Valves

StyleModelInlet SizeOutlet SizeBody MaterialInlet Thread TypeInlet TypeMax. Temp.Discharge CapacityOutlet TypePrice (inc. VAT)
ALFN241X-8 75-210 1 1/41 1/4"1-1/4"Lead Free BrassNPTMale Threaded210° F2195000 btuhFemale Threaded£2,272.13
ALFN241X 100-210 1 1/41 1/4"1-1/4"Lead Free BrassNPTMale Threaded210° F2817000 btuhFemale Threaded£1,987.74
ALFN241X 125-210 1 1/41 1/4"1-1/4"Lead Free BronzeNPTMale Threaded210° F3438000 btuhFemale Threaded£2,026.18
ALFN241X 150-210 1 1/41 1/4"1-1/4"Lead Free Copper Silicon AlloyNPTMale Threaded210° F4059000 btuh At 150 psiFemale Threaded£2,940.71
ALFN241X-8 125-210 1 1/41 1/4"1-1/4"Lead Free BrassNPTMale Threaded210° F3438000 btuhFemale Threaded£2,312.09
BLFN240X-150-210-1"1"1"Lead Free Bronze-Female Threaded210 Degree F-Female Threaded£1,378.13
CLFN240X 100-210 11"1"Lead Free BrassFPTFemale Threaded210° F2817000 btuhFemale Threaded£1,818.66
CLFN240X-9 100-210 11"1"Lead Free BrassFPTFemale Threaded210° F2817000 btuhFemale Threaded£2,043.09
BLFN240X9-150-210-1"1"1"Lead Free Copper Silicon Alloy-Female Threaded210 Degree F-Female Threaded£1,584.35
CLFN240X 110-210 11"1"Lead Free BrassFPTFemale Threaded210° F-Female Threaded£1,749.45
CLFN240X-9 125-210 11"1"Lead Free BrassFPTFemale Threaded210° F3438000 btuhFemale Threaded£2,084.61
DLFN241X8-150-210-11/4"1-1/4"1-1/4"Lead Free Copper Silicon Alloy-Male Threaded210 Degree F-Female Threaded£1,918.50
ELFN241X5-150-210-1-1/4"1.25"1.25"Lead Free Copper Silicon Alloy-MNPT210 Degrees F-FNPT£1,575.21
WATTS -

100XL Series Temperature and Pressure Relief Valves

StyleModelMax. Temp.Max. Working PressureRelief PressureShank LengthThermostat Probe LengthPrice (inc. VAT)
A100XL-100180-Z11180° F113 psi150 Psi1 1/8"3"£55.34
B100XL4Z11 150180 3/4180 Degree F-150 Psi1 1/8"-£55.34
C100XL-BP-150210210° F150 psi150 Psi1 1/8"3"£38.05
D100XL-8-125210210° F125 psi125 psi1 1/8"8"£58.66
C100XL-125210210° F125 psi125 psi1.1875"4"£33.45
A100XL-090210210° F90 psi90 Psi1 1/8"3"£64.58
C100XL-075210210° F75 PSI75 Psi1 1/8"3"£37.29
C100XL-175-210210° F175 PSI175 Psi1 1/8"3"£30.32
CDP100XL-TT-150210210° F150 psi150 Psi1 1/8"3"£149.90
D100XL-8-100210210° F100 PSI100 Psi1 1/8"8"£67.85
D100XL-8-175210210° F175 PSI175 Psi1 1/8"8"£71.09
E100XL-8-150210 3/4210 Degree F-150 Psi1.1875"-£36.49
FLLL100XL-2M7-150210 3/4210 Degree F-150 Psi--£48.05
GL100XLM7-3-125210 3/4210 Degree F-125 psi2 1/8"-£63.41
B100XL-150 3/4210 Degree F-150 Psi1 1/8"-£25.36
B100XL-B-150210 3/4210 Degree F-150 Psi1 1/8"-£44.24
B100XL-100210 3/4210 Degree F-100 Psi1 1/8"-£52.27
GL100XL-100210 3/4210 Degree F-100 Psi--£63.41
StyleModelRelief PressurePrice (inc. VAT)
ALF1L-2 125-210 1/2125 psi£79.18
ALF1L-2 150-210 1/2150 Psi£71.85
WATTS -

LFLL40XL Extended Inlet Shank Temperature and Pressure Relief Valves

StyleModelInlet SizeOutlet SizeRelief PressureShank LengthPrice (inc. VAT)
ALFLL40XL-M15 150-210 11"1"150 Psi1 25/32"£2,085.30
BLFLL40XL-M15 150-210 3/43/4"3/4"150 Psi1 21/32"£724.85
CLFLLL40XL-M15 150210 3/43/4"3/4"150 Psi1 25/32"£760.19
BLFLL40XL 75-210 3/43/4"3/4"75 Psi1 21/32"£855.50
WATTS -

LF53 Series Pressure Relief Valves

StyleModelInlet SizeOutlet SizeRelief PressurePrice (inc. VAT)
ALF53-75 1/21/2"1/2"75 Psi£149.90
BLF53-100 1/21/2"1/2"100 Psi£158.34
BLF53-125 1/21/2"1/2"125 psi£145.26
CLF53-125 3/43/4"3/4"125 psi£165.26
CLF53-75 3/43/4"3/4"75 Psi£156.05
DLF53-100 3/43/4"3/4"100 Psi£176.37
StyleModelBody MaterialMax. Working PressurePressure RangeRelief PressurePrice (inc. VAT)
ALF53L-Z2-30 1/2Brass-75 to 125 Psi30 Psi£152.21
ALF53L-150 1/2Lead Free Copper Silicon Alloy113 psi75 to 150 psi150 Psi£141.45
ALF53L-125 1/2Lead Free Copper Silicon Alloy94 psi75 to 150 psi125 psi£141.45
ALF53L-175 1/2Lead Free Copper Silicon Alloy-75 to 150 psi175 Psi£141.45
ALF53L-75 1/2Lead Free Copper Silicon Alloy-75 to 150 psi75 Psi£141.45
ALF53L-100 1/2Lead Free Copper Silicon Alloy-75 to 150 psi100 Psi£141.45
WATTS -

LF40L Series Automatic Re Seating Temperature and Pressure Relief Valves

StyleModelBody MaterialDischarge CapacityInlet SizeMax. Temp.Outlet SizeRelief PressurePrice (inc. VAT)
ALF40L 100-210 1Lead Free Brass998000 btuh1"210° F1"100 Psi£946.20
BLF40L 150-210 3/4Lead Free Brass-3/4"210 Degree F3/4"150 Psi£550.35
ALF40L 125-210 1Lead Free Brass1218000 btuh1"210° F1"125 psi£946.20
ALF40L 150-210 1Lead Free Bronze2134000 btuh1"210° F1"150 Psi£998.25
WATTS -

N240 Series Automatic Re Seating Temperature And Pressure Relief Valves

Watts N240 Series automatic re-seating temperature and pressure relief valves provide reliable and automatic protection for hot water storage tanks and water heaters in commercial applications. These valves have tamper-resistant bonnet screws that prevent unauthorised adjustments or tampering. They feature an automatic reseating function that prevents excessive temperature or pressure buildup within the water heater or storage tank. These Watts N240 Series valves offer stainless steel thermostat tubes to prevent corrosion.

StyleModelInlet SizeMax. Temp.Outlet SizeRelief PressurePrice (inc. VAT)
AN240X 150-210 11"210° F1"150 Psi£573.65
BN240X-075/210 11"210 Degree F1"75 Psi£1,222.77
BN240X9 75-210 11"210 Degree F1"75 Psi£1,375.32
CN241X 75-210 1 1/41-1/4"210 Degree F1-1/4"75 Psi£1,645.35
CN241X8 100-210 1 1/41-1/4"210 Degree F1-1/4"150 Psi£1,425.20
WATTS -

740 Series Water Pressure Relief Valves

Watts 740 Series pressure relief valves are ideal for protecting water heating equipment from excessive pressure. They are used in the pipeline or with vessels in pneumatics applications. These valves feature an iron body ensuring structural rigidity and durability. They feature non-mechanical seat-to-disc alignment that prevents the valve from sticking or freezing, ensuring smooth and consistent operation over time. Their seat is strategically located above the drain, preventing water from being trapped and sediment from fouling the seats. They can operate at pressures ranging from 30 to 75 psi (2 to 5 bar), providing reliable performance.

StyleModelDischarge CapacityInlet SizeMax. Working PressureOutlet SizeRelief PressurePrice (inc. VAT)
A740-045 11750000 btuh At 45 psi1"-1-1/4"45 Psi£911.30
A740-050 11899000 btuh1"38 psi1-1/4"50 Psi£347.19
A740-060 12200000 btuh1"45 psi1-1/4"60 Psi£667.88
A740-030 25250000 btuh2"20 psi2-1/2"30 Psi£1,649.44
RFQ
A740-060 28883000 btuh At 60 psi2"45 psi2-1/2"60 Psi£2,658.04
RFQ
WATTS -

Gas Shutoff Valves

StyleModelInlet ConnectionInlet SizeInlet Thread TypePrice (inc. VAT)
A92ST-4242Female Threaded3/4"FPT£39.80
RFQ
B94-3232Female Threaded1/2"NPT£13.72
RFQ
A92ST-3232Female Threaded1/2"IPS£33.78
RFQ
C91-3042Flare Joint5/8"-£13.19
RFQ
D91-1010RFlare Joint3/8"-£49.98
RFQ
E91-3032Flare Joint5/8"-£10.28
RFQ
WATTS -

Boiler Pressure Relief Valves

StyleModelPrice (inc. VAT)
ALF474AM2-125£150.28
BM375M1-075 3/4£200.88
C474A-M2-125£151.42
WATTS -

340 Series Automatic Re-Seating Temperature and Pressure Relief Valves

StyleModelDischarge CapacityInlet SizeMfr. SeriesOutlet SizeRelief PressureThermostat Probe LengthPrice (inc. VAT)
A340X-8-80210 1 1/2-1-1/2"3401-1/2"80 Psi-£3,644.72
B342X-8-100210 2-2"3422"100 Psi-£3,644.72
A340-075/210 1 1/2-1-1/2"3401-1/2"75 Psi-£3,429.79
B342-100210 2-2"3422"100 Psi-£3,435.20
A340X-8-75210 1 1/2-1-1/2"3401-1/2"75 Psi-£3,404.51
C340X-8-Z-175210 1 1/2-1 1/2"3401-1/2"175 Psi8"£3,617.27
C340X-8-100210 1 1/24426000 btuh1 1/2"3401-1/2"100 Psi8"£3,102.28
C340-100/210 1 1/24426000 btuh1 1/2"3401-1/2"100 Psi3"£2,919.36
D342X-8-125210 25403000 btuh2"3422"125 psi8"£3,237.58
D342-125210 25403000 btuh2"3422"125 psi-£2,730.26
C340X-8-125210 1 1/25403000 btuh1 1/2"3401-1/2"125 psi8"£2,897.82
C340-125/210 1 1/25403000 btuh1 1/2"3401-1/2"125 psi3"£2,727.19
D342X-8-150210 26379000 btuh2"3422"150 Psi8"£3,157.66
C340X-8-150210 1 1/26379000 btuh1 1/2"3401-1/2"150 Psi8"£2,897.82
C340-150210 1 1/26379000 btuh1 1/2"3401-1/2"150 Psi3"£2,727.19

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