Apply to be a TradeMaster!
Filter menu expanded

Filters

370 items
Reset

SORT

Product Availability

Show In Stock Only (216)

Brand

Apollo Valves (166)
Bell & Gossett (14)
Caleffi (3)
Cash-Acme (20)
McDonnell & Miller (21)
Prier (8)
Watts (127)
Webstone (1)
Zoeller (1)
Zurn (9)

Size

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

Pressure Set Point

5 (4)
8 (2)
10 (3)
15 (24)
20 (3)
30 (46)
35 (1)
36 (5)
40 (13)
45 (13)

Capacity (BTU)

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)

Review Score

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

Price Range

$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

Help Face
Need a little help?
370 items
Grid
List
Compare
Product Image of 1" F82 Pressure Relief Valve, Lead Free (50 PSI)
$108.70 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1/2" MNPT x 1/2" FNPT RVS52 258 LBS/HR Steam Safety Relief Valve (35 psi)
$122.47 each
In Stock
Get 2 by Wed, Aug 19
In Stock
Get 2 by Wed, Aug 19
Compare
Product Image of 19 Series 1" x 1-1/4" Safety Relief Valve, 604 LBS/HR (45 psi)
$611.40 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 3" MNPT x 3" FNPT RVS12 4,100 LBS/HR Low Pressure Relief Valve (15 psi)
$1,144.84 each
In Stock
Get 1 by Thu, Aug 20
In Stock
Get 1 by Thu, Aug 20
Compare
Product Image of 19 Series 1/2" MNPT x 3/4" FNPT 646 LBS/HR Safety Relief Valve (100 psi)
$322.11 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/4" x 1-1/2" Model 740 Boiler Pressure Relief Valve w/ Flood Sensor Connectivity (45 psi)
$656.87 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 3/4" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (60 psi)
$376.69 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/4" MNPT x 1-1/2" FNPT RVS13 1200 LBS/HR Low Press Steam Safety Relief Valve (5 psi)
$205.97 each
In Stock
Get 7 by Tue, Aug 18
In Stock
Get 7 by Tue, Aug 18
Compare
Product Image of 1/2" LF53L-175 Poppet Type Lead Free Pressure Relief Valve (175 psi)
$171.79 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 3/4" 3L-100 Poppet Type Pressure Relief Valve w/ Test Lever (100 psi)
$138.47 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/2" FNPT x 2" FNPT RVW61 2,417,000 BTU Bronze Hot Water Relief Valve (15 psi)
$948.40 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1" MNPT x 1" FNPT RVS13 643 LBS/HR Low Pressure Steam Safety Valve (8 psi)
$117.90 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 3/4" MIP Pressure Relief Valve (125 PSI), 451-34-125
$17.61 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
Compare
Product Image of 1" x 1-1/4" MNPT x FNPT Sec VIII Liquid Bronze Safety Relief Valve (125 psig) 511EEBJMAA0125
$354.22 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
Compare
Product Image of 3/4" LF3L-125 Poppet Type Pressure Relief Valve, 125 psi, Test Lever (Lead Free)
$108.75 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
Compare
Product Image of 19 Series 1" MNPT x 1-1/4" FNPT 2,191 LBS/HR Safety Relief Valve (125 psi)
$437.52 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 3/4" RVW60 Bronze Relief Valve, 20 psi
$157.85 each
In Stock
Get 1 by Tue, Aug 18
In Stock
Get 1 by Tue, Aug 18
Compare
Product Image of 19 Series 1-1/2" MNPT x 2" FNPT 4,602 LBS/HR Safety Relief Valve (100 psi)
$714.11 each
In Stock
Get 1 by Wed, Aug 19
In Stock
Get 1 by Wed, Aug 19
Compare
Product Image of 1-1/2" 174A Relief Valve w/ Flood Sensor Connectivity (150 psi)
$715.89 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/4" FNPT x 1-1/2" FNPT RVW61 3,656,000 BTU Bronze Hot Water Relief Valve (45 psi)
$529.43 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1" 174A Relief Valve w/ Flood Sensor Connectivity (60 psi)
$620.04 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (150 psi)
$1,148.77 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/4" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (150 psi)
$982.78 each
In Stock
Get 1 by Wed, Aug 19
In Stock
Get 1 by Wed, Aug 19
Compare
Product Image of 29 Series 1/2" MNPT x 1" FNPT 423 LBS/HR Safety Relief Valve, Stainless Steel Trim (100 psi)
$462.59 each
In Stock
Get 1 by Tue, Aug 18
In Stock
Get 1 by Tue, Aug 18
Compare
Product Image of 3/4" MNPT x 3/4" FNPT RSV13 290 LBS/HR Low Pressure Steam Safety Relief Valve (5 psi)
$95.34 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/2" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (125 psi)
$2,204.83 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 3/4" MNPT x 3/4" FNPT RVW30 420,000 BTU Bronze Relief Valve (20 psi)
$130.25 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/2" F82 High Capacity Pressure Relief Valve (125 PSI) - Lead Free
$504.39 each
In Stock
Get 2 by Fri, Aug 21
In Stock
Get 2 by Fri, Aug 21
Compare
Product Image of 1-1/4" 174A Relief Valve w/ Flood Sensor Connectivity (75 psi)
$697.72 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 3/4" NPT ASME Relief Valve, 900,000 BTU Capacity, 36 PSIG (790-36)
$305.72 each
Backorder
Get it by Wed, Oct 28 - Wed, Nov 25
Backorder
Get it by Wed, Oct 28 - Wed, Nov 25
Compare
Product Image of 3/4" FNPT x 3/4" FNPT RVW40 587,000 BTU Hot Water Relief Valve, 40 PSIG (Satin Chrome Finish)
$46.62 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 19 Series 3/4" MNPT x 1" FNPT 1,404 LBS/HR Safety Relief Valve (125 psi)
$458.20 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 3/4" MIP Pressure Relief Valve (100 PSI), 451-34-100
$17.36 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
Compare
Product Image of 250-1-75, Relief Valve 1" NPT, 75 psi (5.3 kg/cm2)
$252.19 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 3/4" MNPT x Top RVS13 410 LBS/HR Low Pressure Steam Safety Relief Valve (15 psi)
$92.84 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 19 Series 1-1/4" MNPT x 1-1/2" FNPT 3,595 LBS/HR Safety Relief Valve (125 psi)
$471.37 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 19 Series 1" MNPT x 1-1/4" FNPT 1,798 LBS/HR Safety Relief Valve (100 psi)
$459.93 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/2" 174A Relief Valve w/ Flood Sensor Connectivity (75 psi)
$835.84 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1/2" FWL Pressure Relief Valve (15-200 PSI)
$59.21 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
Compare
Product Image of 1-1/4" FNPT x 1-1/2" FNPT RVW61 8,668,000 BTU Bronze Hot Water Relief Valve (125 psi)
$529.43 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1/2" x 3/4" 327 LBS/HR ASME Sec VIII Safety Valve
$357.20 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 2" 174A Relief Valve w/ Flood Sensor Connectivity (70 psi)
$1,098.75 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/2" 174A Relief Valve (100lb)
1-1/2" 174A Relief Valve (100lb)
SKU: F276890
Watts
SKU: F276890
Brand: Watts
$822.50 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/2" RVW60 6,421,000 BTU Capacity Bronze Relief Valve, 75 psi
$634.69 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/2" FNPT RVW60 11,871,000 BTU Capacity Bronze Relief Valve, 150 psi
$668.92 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Compare
Product Image of 1-1/4" FNPT x 1-1/2" FNPT RVW61 5,849,000 BTU Bronze Hot Water Relief Valve (80 psi)
$550.33 each
In Stock
Get 2 by Wed, Aug 19
In Stock
Get 2 by Wed, Aug 19
Compare
Product Image of 2" 174A Relief Valve w/ Flood Sensor Connectivity (150 psi)
$1,125.83 each
In Stock
Get 24 by Wed, Aug 19 - Thu, Aug 20
In Stock
Get 24 by Wed, Aug 19 - Thu, Aug 20
Compare
Product Image of 1-1/4" LF174A Lead Free Relief Valve w/ Flood Sensor Connectivity (60 psi)
$1,694.07 each
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Backorder
Get it by Wed, Sep 16 - Wed, Oct 14
Resources
FAQs, Manuals & Videos
Articles
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.