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Apollo Valves (166)
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1/2" (43)
3/4" (146)
1" (85)
1" x 1-1/2" (1)
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1-1/2" x 2-1/2" (2)
1-1/4" (57)
1-1/2" (59)
2" (54)

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5 (4)
8 (2)
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15 (24)
20 (3)
30 (46)
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36 (5)
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20,000 - 30,000 (1)
100,000 - 150,000 (1)
400,000 - 500,000 (7)
500,000 - 600,000 (15)
600,000 - 700,000 (6)
700,000 - 800,000 (8)
800,000 - 900,000 (8)
900,000 - 1,000,000 (9)
1,000,000 - 2,000,000 (43)
2,000,000 - 3,000,000 (32)

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(1)
(10)
(117)
(1)

Price Range
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$10 to $15 (3)
$15 to $20 (11)
$20 to $25 (2)
$25 to $30 (1)
$30 to $35 (1)
$35 to $40 (4)
$40 to $45 (4)
$45 to $50 (5)
$50 to $60 (8)
$60 to $70 (10)

Pressure Relief Valves

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Product Image of 2" x 2-1/2" Model 740 Boiler Pressure Relief Valve w/ Flood Sensor Connectivity (60 psi)
2" x 2-1/2" Model 740 Boiler Pressure Relief Valve w/ Flood Sensor Connectivity (60 psi)
SKU: F384342
Watts
SKU: F384342
Brand: Watts
$1,442.62 each
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Product Image of 2" FNPT x 2-1/2" FNPT RVW61 6,091,000 BTU Hot Water Relief Valve, 130 psi
2" FNPT x 2-1/2" FNPT RVW61 6,091,000 BTU Hot Water Relief Valve, 130 psi
SKU: 1061830
Apollo Valves
SKU: 1061830
Brand: Apollo Valves
$1,229.00 each
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Product Image of 1-1/2" x 2-1/2" MNPT x FNPT Sec VIII Liquid Bronze Safety Relief Valve (75 psig) 511HGBJMAA0075
1-1/2" x 2-1/2" MNPT x FNPT Sec VIII Liquid Bronze Safety Relief Valve (75 psig) 511HGBJMAA0075
SKU: 511HGBJMAA0075
Apollo Valves
SKU: 511HGBJMAA0075
Brand: Apollo Valves
$1,040.96 each
Out of Stock
Get it by Tue, Sep 1 - Wed, Sep 9
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Product Image of Switch, Cord, Seal Assembly for WM264 Pump
Switch, Cord, Seal Assembly for WM264 Pump
SKU: 011-563
Zoeller
SKU: 011-563
Brand: Zoeller
$150.93 each
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Product Image of 250-2-45, Relief Valve 2" NPT, 45 psi (3.2 kg/cm2)
250-2-45, Relief Valve 2" NPT, 45 psi (3.2 kg/cm2)
SKU: 183225
McDonnell & Miller
SKU: 183225
Brand: McDonnell & Miller
$1,242.20 each
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Product Image of 2" MNPT x FNPT ASME Sec I Steam Bronze Safety Relief Valve Metal Seat (100 psig) 19MHHA100
2" MNPT x FNPT ASME Sec I Steam Bronze Safety Relief Valve Metal Seat (100 psig) 19MHHA100
SKU: 19MHHA100
Apollo Valves
SKU: 19MHHA100
Brand: Apollo Valves
$750.60 each
Out of Stock
Get it by Tue, Sep 1 - Wed, Sep 9
Out of Stock
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Product Image of 250-3/4-50, Relief Valve 3/4" NPT, 50 psi (3.5 kg/cm2)
250-3/4-50, Relief Valve 3/4" NPT, 50 psi (3.5 kg/cm2)
SKU: 181525
McDonnell & Miller
SKU: 181525
Brand: McDonnell & Miller
$163.10 each
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Product Image of LFBP30 1/2" By-Pass Control Relief Valve (10-50 psi)
LFBP30 1/2" By-Pass Control Relief Valve (10-50 psi)
SKU: 0121399
Watts
SKU: 0121399
Brand: Watts
$591.75 each
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Product Image of 1/2" MNPT x 1/2" FNPT Bronze Adjustable Relief Valve w/ Nitrile Disc & Seat (50-250 psi)
1/2" MNPT x 1/2" FNPT Bronze Adjustable Relief Valve w/ Nitrile Disc & Seat (50-250 psi)
SKU: 1650101
Apollo Valves
SKU: 1650101
Brand: Apollo Valves
$105.45 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
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Product Image of 1/2" MIP Pressure Relief Valve (100 PSI), 451-12-100
1/2" MIP Pressure Relief Valve (100 PSI), 451-12-100
SKU: 451-12-100
Prier
SKU: 451-12-100
Brand: Prier
$15.43 each
In Stock
Get 3 by Tue, Aug 18
In Stock
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Product Image of 1-1/2" RVW60 10,054,000 BTU Capacity Bronze Relief Valve, 125 psi
1-1/2" RVW60 10,054,000 BTU Capacity Bronze Relief Valve, 125 psi
SKU: 1060725
Apollo Valves
SKU: 1060725
Brand: Apollo Valves
$668.92 each
Backorder
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Product Image of 1-1/4" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (50 psi)
1-1/4" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (50 psi)
SKU: F121513
Watts
SKU: F121513
Brand: Watts
$1,430.27 each
Backorder
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Product Image of 250-3/4-15, Relief Valve 3/4" NPT, 15 psi (1 kg/cm2)
250-3/4-15, Relief Valve 3/4" NPT, 15 psi (1 kg/cm2)
SKU: 181220
McDonnell & Miller
SKU: 181220
Brand: McDonnell & Miller
$163.10 each
Backorder
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Product Image of 3/4" MNPT x 3/4" FNPT RVW30 805,000 BTU Hot Water Relief Valve, 50 PSIG (Brass Finish)
3/4" MNPT x 3/4" FNPT RVW30 805,000 BTU Hot Water Relief Valve, 50 PSIG (Brass Finish)
SKU: 1030110
Apollo Valves
SKU: 1030110
Brand: Apollo Valves
$145.58 each
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Product Image of 1-1/2" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (75 psi)
1-1/2" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (75 psi)
SKU: F121539
Watts
SKU: F121539
Brand: Watts
(3)
$2,202.43 each
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Product Image of 2" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (125 psi)
2" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (125 psi)
SKU: F121571
Watts
SKU: F121571
Brand: Watts
(5)
$2,703.32 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
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Product Image of 3/4" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (85 psi)
3/4" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (85 psi)
SKU: F121472
Watts
SKU: F121472
Brand: Watts
$440.82 each
Backorder
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Product Image of 1-1/2" MNPT x 2" FNPT RVS13 1,106 LBS/HR Boiler Safety Relief Valve (5 psi)
1-1/2" MNPT x 2" FNPT RVS13 1,106 LBS/HR Boiler Safety Relief Valve (5 psi)
SKU: 13214B05
Apollo Valves
SKU: 13214B05
Brand: Apollo Valves
$266.04 each
Backorder
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Product Image of 19 Series 1-1/2" MNPT x 2" FNPT 1,240 LBS/HR Safety Relief Valve (15 psi)
19 Series 1-1/2" MNPT x 2" FNPT 1,240 LBS/HR Safety Relief Valve (15 psi)
SKU: 19KHGA15
Apollo Valves
SKU: 19KHGA15
Brand: Apollo Valves
$582.69 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
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Product Image of 1-1/4" x 1-1/2" Model 740 Boiler Pressure Relief Valve w/ Flood Sensor Connectivity (70 psi)
1-1/4" x 1-1/2" Model 740 Boiler Pressure Relief Valve w/ Flood Sensor Connectivity (70 psi)
SKU: F383482
Watts
SKU: F383482
Brand: Watts
(1)
$580.21 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
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Product Image of 2" FNPT x 2-1/2" FNPT RVW61 12,412,000 BTU Hot Water High Capacity Pressure Relief Valve, 75 psi
2" FNPT x 2-1/2" FNPT RVW61 12,412,000 BTU Hot Water High Capacity Pressure Relief Valve, 75 psi
SKU: 1061815
Apollo Valves
SKU: 1061815
Brand: Apollo Valves
$1,298.40 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
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Product Image of 250-1-100, Relief Valve 1" NPT, 100 psi (7 kg/cm2)
250-1-100, Relief Valve 1" NPT, 100 psi (7 kg/cm2)
SKU: 182425
McDonnell & Miller
SKU: 182425
Brand: McDonnell & Miller
$379.33 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
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Product Image of 29 Series 1/2" MNPT x 1" FNPT 423 LBS/HR Safety Relief Valve, ASME VIII Steam (100 psi)
29 Series 1/2" MNPT x 1" FNPT 423 LBS/HR Safety Relief Valve, ASME VIII Steam (100 psi)
SKU: 29202L45
Apollo Valves
SKU: 29202L45
Brand: Apollo Valves
$347.75 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
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Product Image of 1-1/2" x 2" MNPT x FNPT Steam Bronze Safety Relief Valve Metal Seat, 15 psig, 19MHGL15
1-1/2" x 2" MNPT x FNPT Steam Bronze Safety Relief Valve Metal Seat, 15 psig, 19MHGL15
SKU: 19MHGL15
Apollo Valves
SKU: 19MHGL15
Brand: Apollo Valves
$472.76 each
Out of Stock
Get it by Tue, Sep 1 - Wed, Sep 9
Out of Stock
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Product Image of 1-1/2" RVW60 8,238,000 BTU Capacity Bronze Relief Valve, 100 psi
1-1/2" RVW60 8,238,000 BTU Capacity Bronze Relief Valve, 100 psi
SKU: 1060720
Apollo Valves
SKU: 1060720
Brand: Apollo Valves
$668.92 each
Backorder
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Product Image of 19 Series 1-1/2" MNPT x 2" FNPT 5,609 LBS/HR Safety Relief Valve (125 psi)
19 Series 1-1/2" MNPT x 2" FNPT 5,609 LBS/HR Safety Relief Valve (125 psi)
SKU: 19KHGA125
Apollo Valves
SKU: 19KHGA125
Brand: Apollo Valves
$615.15 each
Backorder
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Product Image of 1-1/2" NPT Iron Pressure Relief Valve
1-1/2" NPT Iron Pressure Relief Valve
SKU: 110080
Bell & Gossett
SKU: 110080
Brand: Bell & Gossett
$2,014.07 each
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Product Image of 1/2" MNPT x 1/2" FNPT RVS52 232 LBS/HR Steam Safety Relief Valve (30 psi)
1/2" MNPT x 1/2" FNPT RVS52 232 LBS/HR Steam Safety Relief Valve (30 psi)
SKU: 10512B30
Apollo Valves
SKU: 10512B30
Brand: Apollo Valves
$99.83 each
Backorder
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Product Image of 29 Series 1/2" MNPT x 1" FNPT Safety Relief Valve, (150 psi)
29 Series 1/2" MNPT x 1" FNPT Safety Relief Valve, (150 psi)
SKU: 29202A150
Apollo Valves
SKU: 29202A150
Brand: Apollo Valves
$376.39 each
Backorder
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Product Image of 260-1-1/2-40, Relief Valve 1-1/2" NPT, 40 psi (2.8 kg/cm2)
260-1-1/2-40, Relief Valve 1-1/2" NPT, 40 psi (2.8 kg/cm2)
SKU: 182730
McDonnell & Miller
SKU: 182730
Brand: McDonnell & Miller
$1,038.09 each
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Product Image of 19 Series 2" MNPT x 2-1/2" FNPT 14,170 LBS/HR Safety Relief Valve (200 psi)
19 Series 2" MNPT x 2-1/2" FNPT 14,170 LBS/HR Safety Relief Valve (200 psi)
SKU: 19KJHA200
Apollo Valves
SKU: 19KJHA200
Brand: Apollo Valves
$930.97 each
Backorder
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Product Image of 1" x 1-1/2" MNPT x FNPT Bronze Safety Relief Valve Packed Lever (250 psig) 513FEBJMAA0250
1" x 1-1/2" MNPT x FNPT Bronze Safety Relief Valve Packed Lever (250 psig) 513FEBJMAA0250
SKU: 513FEBJMAA0250
Apollo Valves
SKU: 513FEBJMAA0250
Brand: Apollo Valves
$566.58 each
Out of Stock
Get it by Tue, Sep 1 - Wed, Sep 9
Out of Stock
Get it by Tue, Sep 1 - Wed, Sep 9
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Product Image of 1-1/2" RVW60 4,604,000 BTU Capacity Bronze Relief Valve, 50 psi
1-1/2" RVW60 4,604,000 BTU Capacity Bronze Relief Valve, 50 psi
SKU: 1060710
Apollo Valves
SKU: 1060710
Brand: Apollo Valves
$668.92 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
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Product Image of 3/4" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (40 psi)
3/4" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (40 psi)
SKU: F121463
Watts
SKU: F121463
Brand: Watts
(42)
$437.26 each
In Stock
Get 1 by Wed, Aug 19
In Stock
Get 1 by Wed, Aug 19
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More About Pressure Relief Valves
Pressure Relief Valves are Safety Relief Valves which protect fired and unfired hot water vessels against hazardous operating pressures. Pressure Relief Valves vary in BTU capacities, and should be selected based on the capacity of your heating system.
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