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Rheem SP12576C brass relief valve with threaded connections

Rheem

Rheem SP12576C Relief Valve

SKU CH-458B-HHXKP

Relief valve fits Rheem and Vanguard sinks, compatible with numerous Grainger item numbers

  • MaterialHAWA
  • Reliable pressure relief from trusted Rheem engineering
  • Fits Vanguard models for direct replacement convenience
  • Compatible with Grainger items 1PZ78 through 1PZ81
  • Works with 3CFF9 and 3CFG series units
  • Suits 3WA59 to 3WA78 and 6UT01 to 6UT18 ranges

Rheem SP12576C Relief Valve

The Rheem SP12576C is a replacement relief valve designed for Rheem and Vanguard water heaters. It protects the tank by releasing excess pressure during heating cycles. Installers use it when servicing compatible residential and light-commercial units. The valve fits the specific Grainger item numbers listed in the manufacturer data.

Upgrade from worn or leaking factory valves

This valve replaces an original relief valve that has begun to weep or fails to reseat after testing. The jump is worth it when the existing valve shows corrosion on the seat or discharges water during normal operation. It restores the safety function without changing the tank or piping. Use it when the current valve no longer holds pressure reliably.

Sustained pressure relief performance

Under continuous heating the valve opens at the factory-set pressure and closes cleanly when pressure drops. The HAWA material resists scale buildup that can cause chatter during repeated cycles. It maintains consistent reseating over many heating seasons. The design avoids the slow leak that develops in older valves after months of thermal cycling.

Highlights

  • Reliable pressure relief from trusted Rheem engineering
  • Fits Vanguard models for direct replacement convenience
  • Compatible with Grainger items 1PZ78 through 1PZ81
  • Works with 3CFF9 and 3CFG series units
  • Suits 3WA59 to 3WA78 and 6UT01 to 6UT18 ranges

Specifications

BrandRHEEM
MaterialHAWA

Questions about this item

Which Rheem Vanguard sink or fountain models accept the SP12576C relief valve?

The valve fits Rheem Vanguard units that correspond to Grainger item numbers 1PZ78, 1PZ79, 1PZ80, 1PZ81, 3CFF9, 3CFG1 through 3CFG9, 3WA59, 3WA61, 3WA65 through 3WA78, and 6UT01 through 6UT18.

What is the common installation mistake with this relief valve?

Installers often forget to orient the discharge outlet downward and to use the correct thread sealant so the valve seats without leaks.

When should the SP12576C relief valve be replaced?

Replace the valve if it drips continuously, fails to reseat after relieving pressure, or shows corrosion on the HAWA body during routine inspection.

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