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Overview

The High-efficiency, High-tech Heater for Pools Up to 15,000 Gallons

The affordable MasterTemp 125 heater gives you the energy savings and advanced operating features that were previously only available from much larger heaters. With its revolutionary premixed gas combustion technology, it offers 82% thermal efficiency—the highest of any heater in its category.


  • High-performance, affordable heating with premium features
  • 82% energy efficiency is highest in its class
  • 1.5-in. plumbing—ideal for smaller bodies of water up to 15,000 gallons
  • Premixed combustion technology for ultra-fast heat-up
  • Rotating digital display—the first in its price category—provides fast, easy access for programming and monitoring
  • Certified for low-NOx emissions
  • Certified for outdoor and indoor-vented installations

Product Features

Pentair MasterTemp 125 high performance pool heater has advanced components, previously only available from larger pool heaters.

Product Components

  • OneEasy-to-read digital display makes programming and monitoring a cinch
  • TwoRotating display places controls front and center for any installation orientation
  • ThreeLightweight, corrosion and UV-resistant enclosure
  • Four1-1/2” plumbing is ideal for bodies of water up to 15,000 gallons
Pentair MasterTemp 125 High Performance Pool Heater with 82% energy efficiency

Unmatched Energy Efficiency

The MasterTemp 125 heater delivers 82% thermal efficiency—the highest of any heater in its category. And, its revolutionary premixed gas combustion technology means ultra-fast heatup.

Pentair MasterTemp 125 high performance pool heater has advanced components, previously only available from larger pool heaters.

Clear Control

You’ll love the convenience and simplicity of the MasterTemp 125’s digital display. It’s the first ever offered on the market today for its class. This advanced feature gives you more information and better control.

Need equipment or service for your pool?

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