Skip to content
Free Shipping on all orders!
Free Shipping on all orders!

Pentair Max-E-Therm Natural Gas Heater 200K-400K BTU


Trade Grade Item. This manufacturer does not allow this product to be sold online.

Click here to have a sales associate contact you with similar items or local pickup options. →



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.*


  • SR200NA 200 - Natural Gas - 200K BTU
  • SR200HD 200 HD - Natural Gas - 200K BTU - Cupro-Nickel
  • SR333NA 333 - Natural Gas - 333K BTU
  • SR333HD 333 HD - Natural Gas - 333K BTU - Cupro-Nickel
  • SR400NA 400 - Natural Gas - 400K BTU
  • SR400HD 400 HD - Natural Gas - 400K BTU - Cupro-Nickel
  • 475002 - 3'' PVC Direct Air Intake Duct Kit
  • 462048 - Valve Bypass Assembly Connector

*All HD and ASME HD Heater models include the Cupro-Nickel Heat Exchanger.

Support Documents:

Why shop with Vita Filters?

  • Authorized Pentair Dealer
  • Free Shipping • No Minimum
  • Backed By Manufacturer's Warranty
  • 100% Satisfaction Guaranteed!
  • On-Staff Water Experts • Contact us

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

Images are for representation.

Pentair Warranty Support