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Top rated relief valves

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Top rated relief valves

AI-generated summary · updated October 8, 2026 · verify details before purchase.

  1. Cash Acme AA2022 3/4" NPT Lead-Free Brass Relief Valve
    Best value Cash Acme

    Cash Acme AA2022 3/4" NPT Lead-Free Brass Relief Valve

    4.6/5 $134.45 Only 19 left

    Lead-free brass, affordable, widely used for water heater safety.

    • Lead-free
    • Affordable
    • Trusted brand
    • May leak if over-tightened
    View on Amazon manufacturer site
  2. Keeney 506K 3/4" Lead-Free Brass Relief Valve
    Best lead-free budget Plumb Pak

    Keeney 506K 3/4" Lead-Free Brass Relief Valve

    4.4/5 $13.21 Only 2 left

    Low-cost lead-free option, meets code requirements.

    • Lead-free
    • Low price
    • Compliant
    • Less durable than bronze
    View on Amazon manufacturer site
  3. APEC Water 3/4" Brass Pressure Relief Valve
    Best for water systems Merrill

    APEC Water 3/4" Brass Pressure Relief Valve

    4.3/5 $18.49

    Suitable for RO systems and other water treatment equipment.

    • Versatile use
    • Solid brass
    • Reliable pressure release
    • Higher price
    • Limited availability
    View on Amazon manufacturer site
  4. Zurn 3/4" Bronze Relief Valve Z1700
    Commercial grade Zurn

    Zurn 3/4" Bronze Relief Valve Z1700

    4.6/5 $111.74

    Heavy-duty bronze, ideal for commercial water heating systems.

    • Commercial quality
    • Long lifespan
    • Precise pressure setting
    • Expensive
    • Overkill for home use
    View on Amazon manufacturer site
  5. Sparco 3/4" Pressure Relief Valve 502M
    Best for hydronic systems Cash Acme

    Sparco 3/4" Pressure Relief Valve 502M

    4.4/5 $24.05 Only 12 left

    Designed for hydronic heating systems with good reliability.

    • Hydronic compatible
    • Rugged
    • Consistent performance
    • Not for potable water
    View on Amazon manufacturer site
  6. Nibco 3/4" Bronze Relief Valve T-371-B
    Premium construction NIBCO

    Nibco 3/4" Bronze Relief Valve T-371-B

    4.5/5 $123.20

    High-quality bronze valve with excellent durability and flow capacity.

    • Premium materials
    • High flow
    • Long warranty
    • Higher cost
    • Heavy
    View on Amazon manufacturer site
  7. Watts 3/4" Bronze Relief Valve 0536562
    Best overall Watts

    Watts 3/4" Bronze Relief Valve 0536562

    4.7/5 $159.99 Currently unavailable

    Durable bronze construction, ASME certified, reliable pressure relief for residential water heaters.

    • High quality bronze
    • ASME certified
    • Easy installation
    • Limited to 3/4" size
    View on Amazon manufacturer site
  8. Reliance 108382 3/4" x 3/4" Water Heater Relief Valve
    Budget pick Reliance

    Reliance 108382 3/4" x 3/4" Water Heater Relief Valve

    4.5/5 $23.37 Currently unavailable

    Economical option for standard water heaters, widely available.

    • Very affordable
    • Standard fit
    • Easy to replace
    • Not lead-free
    • Basic construction
    View on Amazon manufacturer site

Buying advice

When selecting a relief valve, ensure it matches your system's pressure rating (typically 150 psi for residential water heaters) and size (commonly 3/4" NPT). Check for lead-free certification if required by local codes. Bronze valves offer greater durability than brass, but lead-free brass is more affordable. For commercial or high-use applications, invest in a higher-grade bronze valve. Always install with proper thread sealant and test periodically.

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