MasterTemp® 125 High Performance Pool and Spa Heater - Buy Online

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MASTERTEMP® 125 High Performance Heater


The MasterTemp 125 Heater provides energy-savings and advanced operating features that were only available from much larger heaters. With its revolutionary pre-mixed gas combustion technology, the MasterTemp 125 Heater offers 82% thermal efficiency, the highest in its class. The advanced LCD display/controller provides more information and better control.
  • High-performance, affordable heater with premium features
  • 82% energy efficiency is highest in class
  • 1-1/2 in. Plumbing connection — ideal for smaller bodies of water, including aboveground pools, spas and in ground pools up to 15,000 gallons
  • Pre-mixed combustion technology for ultra-fast heat up
  • Easy-to-use digital display/controller
  • Certified for low NOx emissions
  • Available in natural gas or propane gas
  • Lightweight: 80 lbs. — easy to handle and ship
  • Corrosion and UV-resistant enclosure
  • 3/4 in. gas line up to 50 ft. from source
  • Certified for outdoor and indoor installations
  • For Air Intake Kit order part number 474845
  • Available only through Pentair authorized online retailers
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MASTERTEMP® 125 High Performance Heater
MASTERTEMP® 125 High Performance Heater
SKU#: Product2G_855387203368
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Models / Specs

Item #ImageDimensions (Inches)CORDBTU (000s)GAS TYPEPurchase Options
EC-462024 21x21x23 YES 125,000 Natural Gas Available Online
EC-462025 21x21x23 YES 125,000 Propane Buy Online

Products beginning with EC- are exclusive to e-commerce sales. For warranty information please visit

Pentair Water Pool and Spa StaRite and Mastertemp pool heaters manufactured between December 22, 2020 and January 6, 2021 recall.

CALIFORNIA PROPOSITION 65 WARNING WARNING: Cancer and Reproductive Harm. AVERTISSEMENT: Peut Causer le Cancer et des Dommages au Système Reproducteur. ADVERTENCIA: Cáncer y Daño Reproductivo.
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