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Pentair Max-E-Therm 200K-400K BTU Gas Pool & Spa Heater

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Please Note: Pentair ‘TradeGrade Exclusive’ products require contacting us to purchase. Please use the request form above or Contact Us page; we can provide product details, availability, pricing, purchasing options, etc.

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For indoor or outdoor installations on pools and spas. Features include an LCD temperature readout with dual thermostat controls, temperature safety lockout, and a 6-position control panel. PMG burner technology requires no outdoor draft hood. Proven Dura-Glas Resin provides rust-proof construction. Heavy-duty (HD) unit with cupro-nickel exchanger for improved performance in more challenging applications, like low pH, high flow, or heavy use.

  • Now, with smart connectivity and energy-saving automation, it’s easier than ever to get the pool warm and ready whenever needed.
  • New automation functionality and ignition control module with flame strength sensor for always optimized performance.
  • Max-E-Therm Heater is certified for low NOx emission.
  • The multi-position top panel allows the digital display to be re-positioned for convenient operation.
  • A tough, rustproof exterior handles the heat and weathers the elements.
  • Certified for outdoor and indoor installations.
  • Optional Smart Heater Bypass valve control diverts water flow when the heater isn’t needed to help save up to 35% in yearly operational costs.*


  • Natural Gas Heater - 200K BTU (SR200NA)
  • Propane Gas Heater - 200K BTU (SR200LP)
  • Natural Gas Heavy Duty Heater - 200K BTU (SR200HD)
  • ASME Natural Gas Heater - 250K BTU (460767)
  • ASME Propane Gas Heater - 250K BTU (460768)
  • Natural Gas Heater - 333K BTU (SR333NA)
  • Propane Gas Heater - 333K BTU (SR333LP)
  • Natural Gas Heavy Duty Heater - 333K BTU (SR333HD)
  • Natural Gas Heater - 400K BTU (SR400NA)
  • Propane Gas Heater - 400K BTU (SR400LP)
  • Natural Gas Heavy Duty Heater - 400K BTU (SR400HD)
  • Natural Gas ASME Heater - 400K BTU (460763)
  • Propane Gas ASME Heater - 400K BTU (460764)
  • Air Intake Kit (475002)
  • Smart Bypass Kit (462048)

Support Documents: 

Disclaimer: Professional installation is required (not included). Proof of installation by a trained technician is required to validate the factory warranty.

Pentair Pool Warranty Support

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