Temperature & Pressure Relief Valves

A Temperature and Pressure (T & P) relief valve is the primary "back-up" safety device that prevents water in a pressurized hot water heater from overheating. A T & P relief valve is a two-in-one safety device, which responds both to excessive temperature and to excessive pressure in a water heater. If a system exceeds its temperature/pressure limit, a water heater or pipe will burst, making the proper installation of a T&P relief valve essential.

Manuals - Temperature & Pressure Relief Valves


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  • 3/4" 40L-3 T&P Relief Valve (150 psi) View Specs
    • SKU: 0153614
    • Brand: Watts

    $99.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 3/4" 40XL-5 T&P Relief Valve (125 psi) View Specs
    • SKU: 0156481
    • Brand: Watts

    $165.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 3/4" 40XL-5 T&P Lead Free Relief Valve (125 psi) View Specs

    $239.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 3/4" LF40L-3 Lead Free T&P Relief Valve (150 psi) View Specs

    $109.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 3/4" 40XL-5 T&P Relief Valve (150 psi) View Specs
    • SKU: 0156731
    • Brand: Watts

    $59.95 / each

    $289.25 / box
    5 x $57.85

    In Stock! (14 Available) Ships in 24-48 Hrs
  • 3/4" 40XL-5 Lead Free T&P Relief Valve (150 psi) View Specs

    $79.95 / each

    $384.75 / box
    5 x $76.95

    In Stock! (4 Available) Ships in 24-48 Hrs
  • 3/4" 40XL-8 T&P Relief Valve (150 psi) View Specs
    • SKU: 0158774
    • Brand: Watts

    $125.95 / each

    $364.65 / box
    3 x $121.55

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 3/4" 40XL-8 Lead Free T&P Relief Valve (150 psi) View Specs

    $149.95 / each

    $434.25 / box
    3 x $144.75

    In Stock! (1 Available) Ships in 24-48 Hrs
  • 1" 40XL-4 Lead Free T&P Relief Valve (150 psi) View Specs

    $99.95 / each

    $482.25 / box
    5 x $96.45

    In Stock! (23 Available) Ships in 24-48 Hrs
  • 3/4" 40XL-8 T&P Relief Valve (95 psi) View Specs
    • SKU: 0158670
    • Brand: Watts

    $245.95 / each

    In Stock! (1 Available) Ships in 24-48 Hrs
  • 1" 40L-2 T&P Relief Valve (150 psi) View Specs
    • SKU: 0154830
    • Brand: Watts

    $139.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 1" LF40L-2 Lead Free T&P Relief Valve (150 psi) View Specs

    $149.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 1" 40XL-7 T&P Relief Valve (150 psi) View Specs
    • SKU: 0163765
    • Brand: Watts

    $128.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 1" LF40XL-7 Lead Free T&P Relief Valve (150 psi) View Specs

    $154.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 3/4" LF10L-2, T & P Relief Valve, Lead Free - 150 psi View Specs

    $28.95 / each

    Out of Stock Allow 7-10 Days to Ship Out
  • 3/4" LF10L-2, T & P Relief Valve, Lead Free - 125 psi View Specs

    $28.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • LFL100XL3M7, 3/4" Lead Free Extended Shank T & P Relief Valve View Specs

    $18.95 / each

    $181.50 / box
    10 x $18.15

    In Stock! (4 Available) Ships in 24-48 Hrs
  • LFLL100XL, 3/4" Lead Free Extended Shank T & P Relief Valve View Specs

    $18.25 / each

    $175.50 / box
    10 x $17.55

    In Stock! (18 Available) Ships in 24-48 Hrs
  • LF100XL 3/4" Lead Free T & P Relief Valve (175 PSI, 210 F) View Specs

    $12.95 / each

    $124.50 / box
    10 x $12.45

    In Stock! (12 Available) Ships in 24-48 Hrs
  • LF100XL-4 3/4" Lead Free Self Closing T & P Relief Valve View Specs

    $10.95 / each

    $105.50 / box
    10 x $10.55

    In Stock! (91 Available) Ships in 24-48 Hrs