Pentair 473715Z 50 PSI pressure relief valve for MasterTemp and Max-E-Therm heatersPentair MasterTemp Pressure Relief Valve 50 PSI, 473715Z In stock$15399
Pentair 473715Z 50 PSI pressure relief valve for MasterTemp and Max-E-Therm heaters
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Pentair MasterTemp Pressure Relief Valve 50 PSI, 473715Z

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$15399
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Quick overview

  • Relieves at 50 PSI Rated for the 50 PSI setting the heater water system is built around.
  • Fits two heater families Pentair lists it for both MasterTemp and Max-E-Therm heaters.
  • Genuine Pentair Factory part number 473715Z.
  • A safety device The relief valve is what protects the heat exchanger and the plumbing from over pressure.
  • Water system component It belongs to the water side of the heater, not the gas train.
  • Replace, never plug A valve that weeps or has been capped off should be changed, not defeated.
Full description and specifications ↓

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Product details

The Pentair 473715Z is the 50 PSI pressure relief valve for the Max-E-Therm and MasterTemp heater water system. It is the genuine Pentair replacement.

Why the valve is there

A gas heater can build pressure faster than the plumbing can shed it if a valve is closed against it or the system traps water while the burner is firing. The relief valve is the deliberate weak point: it opens at 50 PSI and dumps rather than letting the heat exchanger or the pipework take the load. It is the last defence, and it is the one part on the heater that should never be bypassed.

When to change it

Relief valves fail toward leaking. Scale and corrosion keep the seat from closing again after it has lifted, so the valve seeps continuously and the heater loses water. If yours weeps, has been lifted repeatedly, or somebody has plugged it, fit a new one. Confirm the 50 PSI rating is the one your heater calls for before you install it.

Specifications
Brand Pentair
Manufacturer part number 473715Z
UPC 788379747688
Type Pressure relief valve
Relief pressure 50PSI
Assembly Heater Water System
Fits Pentair Max-E-Therm, Pentair MasterTemp
Shipping weight 0.7 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Which heaters does this fit?
Pentair lists 473715Z for the Max-E-Therm and MasterTemp heater water system.
What pressure does it relieve at?
50 PSI.
My valve drips. Can I just cap it?
No. A relief valve that will not reseat has to be replaced. Capping it removes the only over pressure protection the heat exchanger has.
Is this a genuine Pentair part?
Yes, it is the Pentair replacement, part number 473715Z.
Ask your own question