Best Brass Relief Valves in 2026
Daisy
Last Updated: Jul 19, 2026
Daisy
Last Updated: Jul 19, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
CASH ACME RELIEF VALVE: Cash Acme NCLX Combination Temperature and Pressure Relief Valves are designed for the protection of water heaters and storage tanks; incorporate an inert thermal element coating that provides effective isolation from mineral deposits (liming) and galvanic corrosion
DESIGN: The NCLX Series relief valves feature a cast bronze body, brass, and stainless steel internal parts, silicone seat disc, and stainless steel pressure spring
COMPACT: Pressure-reducing and regulating valves
SPECS: NCLX Valves come with standard factory settings of 150 PSI for pressure relief and 210 degrees F for temperature relief
CERTIFIED: The NCLX Temperature and Pressure Relief Valve is certified to be lead-free in accordance with NSF 319; compliant with ASSE standard 1003 and CSA standard B360
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Relief pressure preset to 125 psi with flow rate of 116 cfm
1/4" male NPT threaded inlet connection
Brass construction and stainless steel spring for corrosion resistance
250 degrees F maximum temperature for use in high temperature applications
ASME safety rated with UV and NB marks
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Relief pressure adjustable from 0 to 100 psi
1/4" male NPT threaded inlet connection
Brass construction and stainless steel spring for corrosion resistance
Silicon O-ring provides leak-proof seal to within 10 percent of set pressure
Micrometer-style nylon knob for pressure relief adjustment
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Merrill Manufacturing Company | 9.72 | ✅ | ✅ | ✅ |
Pressure relief valves are for protection against excessive pressure
3/4 in. male NPT x 1/2 in. female FPT
Lead free brass with stainless steel control springs
3/4" Line Connection, 75 PSI
Not for use with water heaters -Cold water systems only
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Relief pressure preset to 60 psi with flow rate of 61 cfm
1/4" male NPT threaded inlet connection
Brass construction and stainless steel spring for corrosion resistance
250 degrees F maximum temperature for use in high temperature applications
ASME safety rated with UV and NB marks
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
DESIGN: The NCLX Series relief valves feature a cast bronze body, brass, and stainless steel internal parts, silicone seat disc, and stainless steel pressure spring
BRONZE BODY: Lead-free and superior reliability
COMPACT: Pressure reducing and regulating valves
CERTIFIED: To ASSE standard 1003 and CSA Standard B356; Certified lead free complying with NSF 319
ASSEMBLED AND TESTED: Prepared in Cash Acme manufacturing plant in Cullman, Alabama
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Merrill Manufacturing Company | 9.72 | ✅ | ✅ | ✅ |
Pressure relief valves are for protection against excessive pressure
1/2 in. male NPT x 1/2 in. female FPT
Lead free brass with stainless steel control springs
1/2" Line Connection, 75 PSI
Not for use with water heaters - Cold water systems only
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Merrill Manufacturing Company | 9.72 | ✅ | ✅ | ✅ |
Pressure relief valves are for protection against excessive pressure
1/2 in. male NPT x 1/2 in. female FPT
Lead free brass with stainless steel control springs
1/2" Line Connection, 100 PSI
Not for use with water heaters - Cold water systems only
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Merrill Manufacturing Company | 9.72 | ✅ | ✅ | ✅ |
Pressure relief valves are for protection against excessive pressure
Lead free brass with stainless steel control springs
3/4" Line Connection, 100 PSI
Not for use with water heaters -Cold water systems only
3/4 in. male NPT x 1/2 in. female NPT
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DataAlchemy | 9.41 | ❌ | ❌ | ❌ |
<b>Price For:</b> Each <b>Inlet Type</b>: MNPT <b>Temp. Range</b>: 0 Degrees to 180 Degrees F <b>Outlet Size</b>: 1/2" <b>Spring Material</b>: Stainless Steel <b>Overall Height</b>: 3" <b>Disc Material</b>: Buna-N <b>Application</b>: Fire Protection Systems <b>Pressure Range</b>: 50 to 175 psi <b>Overall Length</b>: 1-5/8" <b>Body Material</b>: Brass <b>Standards</b>: ANSI Z21.22 <b>Outlet Type</b>: FNPT <b>Test Lever</b>: No <b>Factory Set Pressure</b>: 175 psi
<b>Inlet Size</b>: 3/4" <b>Seat Material</b>: Buna-N <b>Item</b>: Calibrated Adjustable Relief Valve <b>Item</b>: Calibrated Adjustable Relief Valve <b>Pressure Range</b>: 50 to 175 psi <b>Standards</b>: ANSI Z21.22 <b>Country of Origin (subject to change)</b>: United States
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Merrill | 4 |
| Control Devices | 3 |
| Cash Acme | 2 |
| Watts | 1 |
We've carried out a comprehensive analysis of 2,571 reviews on relief valves, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select relief valves priced around $16.77, with top brands including efield, merrill, cash acme, control devices, plumb eeze and watts and pro-edge industrial pneumatics and controls
Our team of expert editors reviewed these high-quality items and handpicked the top 10 relief valves for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include efield usa inc, merrill manufacturing company, amazon.com, supplykick and dataalchemy and upe group .
We are dedicated to assisting our users in finding the right valves Products based on their needs, saving them considerable time when choosing which relief valves to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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