Skip Content

Relief Valves

1,287 products found

Help protect pipelines against excess pressure with a relief valve from Grainger. Choose from a wide range of pressure relief valves that can release pressurized fluid through an auxiliary exhaust pathway. A relief valve is designed to open at a specific pressure to help protect pumps and other equipment from exceeding stress limits. When pressure rises above the set limit, a safety valve can divert liquids, gases or a liquid-gas mixture to a flare header to help relieve pressure and normalize. Choose from relief valves with manual levers, spring-operated types and more at Grainger.Close

Filter Results By

Branch Availability
Item
Body Material
Inlet Type
Outlet Type
Inlet Size
Outlet Size
Factory Set Pressure
Pressure Range
For Drinking Water Applications
For Drinking Water Applications in CA, VT, MD, LA
Brand
Price
Shop By
Ratings

Viewing as

List
  • Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    5DLZ1
    Mfr. Model #
    1/2 LF 530-C STD
    Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet&#
    Web Price $32.60 / each
  • Iron Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X150
    Mfr. Model #
    3/4 740-050
    Iron Safety Relief Valve, FNPT Inlet Type, FNPT Outlet
    Web Price $132.00 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X182
    Mfr. Model #
    3/4 174A-125
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $78.00 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X183
    Mfr. Model #
    3/4 174A-150
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $76.75 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    2P074
    Mfr. Model #
    174 A-3/4"
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $72.75 / each
  • Iron/Bronze Combination Fill and Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    4A822
    Mfr. Model #
    1450F
    Iron/Bronze Combination Fill and Relief Valve, FNPT Inlet&#
    Web Price $94.25 / each
  • Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    31LD85
    Mfr. Model #
    6010EDM01-KM-125
    Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet&#x
    Web Price $273.00 / each
  • Cast Iron Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    31LH25
    Mfr. Model #
    0930-H01-GC-15
    Cast Iron Safety Relief Valve, MNPT Inlet Type, FNPT O
    Web Price $275.00 / each
  • Iron Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X154
    Mfr. Model #
    1 1/4 740-050
    Iron Safety Relief Valve, FNPT Inlet Type, FNPT Outlet
    Web Price $368.50 / each
  • Stainless Steel Purge Valve, MNPT Inlet Type, MNPT Outlet Type

    Brand
    PARKER
    Item #
    5ULR9
    Mfr. Model #
    4M-PG4L-SS
    Stainless Steel Purge Valve, MNPT Inlet Type, MNPT Outlet&#
    Web Price $39.60 / each
  • Lead-Free Brass Vacuum Relief Valve, MNPT Inlet Type, MNPT Outlet Type

    Brand
    WATTS
    Item #
    5DLZ3
    Mfr. Model #
    1/2 LF N36
    Lead-Free Brass Vacuum Relief Valve, MNPT Inlet Type, MNPT&
    Web Price $40.50 / each
  • Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    5NKY6
    Mfr. Model #
    6010FEE01-AM0150
    Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet&#x
    Web Price $262.00 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    1CKW7
    Mfr. Model #
    1060534
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $153.00 / each
  • Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    3EEY2
    Mfr. Model #
    13211B15
    Cast Bronze Safety Relief Valve, MNPT Inlet Type, FNPT
    Web Price $57.25 / each
  • Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    5DLZ2
    Mfr. Model #
    3/4 LF 530-C STD
    Lead-Free Brass Calibrated Adjustable Relief Valve, MNPT Inlet&#
    Web Price $42.40 / each
  • Cast Iron Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    31LH27
    Mfr. Model #
    0930-K01-GC-15
    Cast Iron Safety Relief Valve, MNPT Inlet Type, FNPT O
    Web Price $626.00 / each
  • Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    AQUATROL
    Item #
    3ETU3
    Mfr. Model #
    55A-50
    Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outle
    Web Price $43.20 / each
  • Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    AQUATROL
    Item #
    3ETU4
    Mfr. Model #
    55B-50
    Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outle
    Web Price $46.20 / each
  • Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    2X318
    Mfr. Model #
    530-3/4
    Brass Calibrated Adjustable Relief Valve, MNPT Inlet Type,
    Web Price $31.30 / each
  • Brass Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    CASH ACME
    Item #
    6RKF1
    Mfr. Model #
    F-30
    Brass Safety Relief Valve, MNPT Inlet Type, FNPT Outlet
    Web Price $18.65 / each
  • Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    5NKY1
    Mfr. Model #
    6010EDE01-AM0150
    Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet&#x
    Web Price $233.00 / each
  • PVC Adjustable Back Pressure Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    PLAST-O-MATIC
    Item #
    11G098
    Mfr. Model #
    RVD050V-PV
    PVC Adjustable Back Pressure Relief Valve, FNPT Inlet Type,
    Web Price $246.50 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    6KJ83
    Mfr. Model #
    1060834
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $315.50 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, MNPT Outlet Type

    Brand
    SPENCE
    Item #
    1RYF3
    Mfr. Model #
    0031EEA-150
    Bronze Safety Relief Valve, FNPT Inlet Type, MNPT Outlet&#x
    Web Price $237.00 / each
  • Brass/Bronze Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    AQUATROL
    Item #
    30VZ82
    Mfr. Model #
    740FG-M1A-275
    Brass/Bronze Safety Relief Valve, MNPT Inlet Type, FNPT
    Web Price $426.00 / each
  • Brass Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    CASH ACME
    Item #
    31LH30
    Mfr. Model #
    F-30
    Brass Safety Relief Valve, MNPT Inlet Type, FNPT Outlet
    Web Price $41.50 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    APOLLO
    Item #
    6KJ79
    Mfr. Model #
    1060734
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $242.50 / each
  • Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type

    Brand
    AQUATROL
    Item #
    3ERJ9
    Mfr. Model #
    55A-25
    Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outle
    Web Price $43.20 / each
  • Cast Iron Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    KUNKLE VALVE
    Item #
    31LH26
    Mfr. Model #
    0930-J01-GC-15
    Cast Iron Safety Relief Valve, FNPT Inlet Type, FNPT O
    Web Price $468.00 / each
  • Low-Lead Brass Nonadjustable Relief Valve, FNPT Inlet Type, MNPT Outlet Type

    Brand
    CAMPBELL
    Item #
    4YFC4
    Mfr. Model #
    RV2N-LF
    Low-Lead Brass Nonadjustable Relief Valve, FNPT Inlet Type,
    Web Price $13.20 / each
  • Brass Purge Valve, MNPT Inlet Type, MNPT Outlet Type

    Brand
    PARKER
    Item #
    5ULR8
    Mfr. Model #
    2M-PG4L-B
    Brass Purge Valve, MNPT Inlet Type, MNPT Outlet Type
    Web Price $24.55 / each
  • Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type

    Brand
    WATTS
    Item #
    26X181
    Mfr. Model #
    3/4 174A-100
    Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet&#x
    Web Price $78.00 / each
View More
Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order. More