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Relief Valves

40 products

Showing 1 - 40 of 40 products

Temperature and pressure relief valves, boiler relief valves, safety relief valves and vacuum breakers, in 3/4" through 1-1/4".

A T&P valve is a safety device, not a plumbing fitting. It opens if tank temperature reaches 210°F or pressure reaches 150 psi, and a water heater without a functioning one can fail explosively. Never plug, cap or valve off the discharge.

The three ratings on the tag all have to be right: pressure setting, temperature setting and BTU relieving capacity. That last one is the most often ignored — the valve must be able to discharge at least as much energy as the appliance can produce, so a valve pulled from a 40,000 Btu heater is not adequate on a 199,000 Btu unit even though the threads match.

The probe length also matters. It has to reach into the top six inches of the tank where the hottest water sits; a short probe reads cooler water and opens late.

Boiler relief valves are pressure-only, typically 30 psi for residential hydronic. Materials run bronze, cast brass and lead-free alloys.

Brands include Watts, Cash Acme, Zurn Wilkins and Apollo-Conbraco.

Showing 1 - 40 of 40 products

Watts 0121344 3/4" Lead Free Self Closing T&P Relief Valve, 175 psi, 210°F, Test Lever, 4" Extension Thermostat

Watts Watts 0121344 3/4" Lead Free Self Closing T&P Relief Valve, 175 psi, 210°F, Test Lever, 4" Extension Thermostat

$57.06

In stock, 20 units

Cash Acme F95 1-in X 1-1/4-in 30PSI Iron Body

Cash Acme F95 1-in X 1-1/4-in 30PSI Iron Body

Cash Acme Cash Acme 19499-0030 F-95 1" x 1-1/4" Pressure Relief Valve, 30 PSI, Iron Body

$199.19

Only 2 units left

Cash Acme 19497-0050 F95 3/4-in X 1-in 50PSI Iron Body

Cash Acme Cash Acme 19497-0050 F-95 3/4" x 1" Pressure Relief Valve, 50 PSI, Iron Body

$84.78

Sold out

Watts 0318835 1 1/4" Bronze Automatic Reseating Temperature and Pressure Relief Valve, 125 psi, 210 F, 8" Thermostat

Watts Watts 0318835 1 1/4" Bronze Automatic Reseating Temperature and Pressure Relief Valve, 125 psi, 210 F, 8" Thermostat

$902.40

Only 2 units left

Cash Acme 23272-0150 NCLX-8 3/4-in 150PSI

Cash Acme Cash Acme 23272-0150 NCLX-8 3/4-in 150PSI

$48.15

Only 3 units left

Cash Acme 3/4-in VR20 Vacuum Relief Valve

Cash Acme 3/4-in VR20 Vacuum Relief Valve

Cash Acme Cash Acme 22398LF 3/4-in VR20 Vacuum Relief Valve

$28.72

In stock, 40 units

Cash Acme NCLX-5 Series 3/4-in Temperature and Pressure Relief Valve

Cash Acme NCLX-5 Series 3/4-in Temperature and Pressure Relief Valve

Cash Acme Cash Acme 19783-0150 NCLX-5 Series 3/4-in Temperature and Pressure Relief Valve

$32.92

Only 2 units left

3" Temperature and Pressure Relief Valve

Zurn Wilkins Zurn Wilkins TP1100AE-3C-150C 3/4" Temperature and Pressure Relief Valve, Extended Shank, 150 psi, MNPT x FNPT

$53.69

In stock, 16 units

3/4" Iron Boiler Pressure Relief Valve, 30 psi, Expanded Outlets

Watts Watts 0382008 3/4" Iron Boiler Pressure Relief Valve, 30 psi, Expanded Outlets

$108.11

Only 2 units left

1/2" Lead Free Brass Poppet Type Calibrated Pressure Relief Valve, Adjustable 50-175 psi

Watts Watts 0556035 1/2" Lead Free Brass Poppet Type Calibrated Pressure Relief Valve, Adjustable 50-175 psi

$173.35

In stock, 9 units

3/4" Lead Free Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 degree F, Test Lever, Extension Thermostat

Watts Watts 0556000 3/4" Lead Free Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 Degree F, Test Lever, Extension Thermostat

$56.67

In stock, 11 units

3/4" Bronze Boiler Pressure Relief Valve, 50 psi, Threaded Female Connections

Watts Watts 0274513 3/4" Bronze Boiler Pressure Relief Valve, 50 psi, Threaded Female Connections

$141.84

Only 2 units left

3/4" Brass Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 F, Extended Shank Up To 3" Insulation

Watts Watts 0066440 3/4" Brass Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 F, Extended Shank Up To 3" Insulation

$55.69

In stock, 30 units

3/4" Brass Self Closing Temperature and Pressure Relief Valve, 150 psi, 210 degree F, Test Lever, Extension Thermostat

Watts Watts 0066100 3/4" Brass Self Closing Temperature and Pressure Relief Valve, 150 psi, 210 Degree F, Test Lever, Extension Thermostat

$43.21

In stock, 11 units

4" Temperature and Pressure Relief Valve

Zurn Wilkins Zurn Wilkins TP1100A-4C-150C 3/4" Temperature and Pressure Relief Valve, 150 psi, MNPT x FNPT

$62.34

In stock, 19 units

4" Temperature and Pressure Relief Valve

Zurn Wilkins Zurn Wilkins TP1100A-4C-125C 3/4" Temperature and Pressure Relief Valve, 125 psi, MNPT x FNPT

$58.44

In stock, 7 units

P1000AXL Pressure Relief Valve set at 30 psi

Zurn Wilkins Zurn Wilkins P1000AXL-30C P1000AXL Pressure Relief Valve Set at 30 psi

$75.97

In stock, 30 units

P1000AXL Pressure Relief Valve set at 150 psi

Zurn Wilkins Zurn Wilkins P1000AXL-150C P1000AXL Pressure Relief Valve Set at 150 psi

$75.97

In stock, 23 units

P1000AXL Pressure Relief Valve Set at 125psi

Zurn Wilkins Zurn Wilkins P1000AXL-125C P1000AXL Pressure Relief Valve Set at 125psi

$75.97

In stock, 42 units

3/4" Lead Free Brass Vacuum Relief Valve, Male NPT, Protective Cap

Watts Watts 0556031 3/4" Lead Free Brass Vacuum Relief Valve, Male NPT, Protective Cap

$161.81

In stock, 31 units

3/4" Lead Free Brass Automatic Reseating T and P Relief Valve, 150 psi, 210 degree F, Test Lever, 5" Extension Thermostat

Watts Watts 0556016 3/4" Lead Free Brass Automatic Reseating T and P Relief Valve, 150 psi, 210 Degree F, Test Lever, 5" Extension Thermostat

$1,011.39

Only 3 units left

3/4" Lead Free Brass Automatic Reseating T and P Relief Valve, 125 psi, 210 degree F, Test Lever, 5" Extension Thermostat

Watts Watts 0556015 3/4" Lead Free Brass Automatic Reseating T and P Relief Valve, 125 psi, 210 Degree F, Test Lever, 5" Extension Thermostat

$911.94

Only 3 units left

1" Lead Free Brass Automatic Reseating T and P Relief Valve, 150 psi, 210 degree F, Test Lever, 5" Extension Thermostat

Watts Watts 0556008 1" Lead Free Brass Automatic Reseating T and P Relief Valve, 150 psi, 210 Degree F, Test Lever, 5" Extension Thermostat

$1,618.83

In stock, 6 units

3/4" Lead Free Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 F, Extended Shank Up To 3" Insulation

Watts Watts 0556004 3/4" Lead Free Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 F, Extended Shank Up To 3" Insulation

$91.16

Only 3 units left

3/4" Lead Free Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 F, Extended Shank Up To 2 1/2" Insulation

Watts Watts 0556002 3/4" Lead Free Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 F, Extended Shank Up To 2 1/2" Insulation

$71.39

In stock, 43 units

1 1/4" Iron Boiler Pressure Relief Valve, 30 psi, Expanded Outlets

Watts Watts 0383020 1 1/4" Iron Boiler Pressure Relief Valve, 30 psi, Expanded Outlets

$589.33

Only 1 unit left

1" Iron Boiler Pressure Relief Valve, 30 psi, Expanded Outlets

Watts Watts 0382570 1" Iron Boiler Pressure Relief Valve, 30 psi, Expanded Outlets

$614.73

Only 2 units left

3/4" Bronze Boiler Pressure Relief Valve, 30 psi, Threaded Female Connections

Watts Watts 0274428 3/4" Bronze Boiler Pressure Relief Valve, 30 psi, Threaded Female Connections

$284.85

Only 4 units left

1" Bronze Automatic Reseating Temperature And Pressure Relief Valve, 125 psi, 210 degree F, Test Lever, 3" Thermostat

Watts Watts 0154820 1" Bronze Automatic Reseating Temperature And Pressure Relief Valve, 125 psi, 210 Degree F, Test Lever, 3" Thermostat

$1,210.93

Only 2 units left

3/4" Lead Free Self Closing Temperature And Pressure Relief Valve, 125 psi, 210 degree F, Test Lever, Extension Thermostat

Watts Watts 0121342 3/4" Lead Free Self Closing Temperature And Pressure Relief Valve, 125 psi, 210 Degree F, Test Lever, Extension Thermostat

$55.02

Only 4 units left

3/4" Brass Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 degree F, Extended Shank Up To 2" Insulation

Watts Watts 0066133 3/4" Brass Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 Degree F, Extended Shank Up To 2" Insulation

$76.84

In stock, 7 units

3/4" Brass Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 F, Extended Shank Up To 2 1/2" Insulation

Watts Watts 0066132 3/4" Brass Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 F, Extended Shank Up To 2 1/2" Insulation

$75.79

In stock, 17 units

NCLX-5LX 3/4-in 150PSI

Cash Acme Cash Acme 23266-0150 NCLX-5LX 3/4-in 150PSI

$44.04

Sold out

Cash Acme 3/4" PRV F-30 FIP x FIP Pressure Relief Valve Set at 30 PSI

Cash Acme 3/4" PRV F-30 FIP x FIP Pressure Relief Valve Set at 30 PSI

Cash Acme Cash Acme 14737-0150 3/4" PRV F-30 FIP x FIP Pressure Relief Valve Set at 30 PSI

$31.28

Sold out

NCLX-LS 3/4-in 150PSI

Cash Acme Cash Acme 19084-0150 NCLX-LS 3/4-in 150PSI

$39.51

In stock, 16 units

NCLX-8 3/4-in 150PSI

Cash Acme Cash Acme 16372-0150 NCLX-8 3/4-in 150PSI

$37.69

Only 4 units left

NCLX-5 Series 3/4-in Temperature and Pressure Relief Valve

Cash Acme Cash Acme 15836-0150 NCLX-5 Series 3/4-in Temperature and Pressure Relief Valve

$22.59

Only 5 units left

Cash Acme 13570-0150 F82 3/4-in 150PSI

Cash Acme Cash Acme 13570-0150 F82 3/4-in 150PSI

$88.72

Sold out

Water Heater T&P Relief Valve with 8" Element

Apollo-Conbraco Water Heater T&P Relief Valve with 8" Element

Apollo-Conbraco Apollo-Conbraco 18C402-37 Water Heater T&P Relief Valve with 8" Element

$34.94

In stock, 32 units

Water Heater T&P Relief Valve with 3" Element

Apollo-Conbraco Water Heater T&P Relief Valve with 3" Element

Apollo-Conbraco Apollo-Conbraco 18C-402-30 Water Heater T&P Relief Valve with 3" Element

$34.94

In stock, 16 units

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