MasterTemp 400K BTU LP High Performance Pool and Spa Heaters - Ecommerce - 460737



Model # EC-462029

By Pentair Pool Products

  5 Average  



Model # EC-462029

Warranty Ecommerce (EC) products: Products purchased from an Authorized Pentair Online Reseller (products beginning with EC-) receive a one (1) year (parts only) warranty from the date of purchase. The exceptions are: IntelliChlor cells and IntelliFlo SVRS pumps which receive a two (2) year warranty. EC products are not eligible for the bundled three (3) year extended warranty.

Manufacturer Code 460737

Alternate Part #'s 460737, EC462029, PENEC-462029

Product Description

The MasterTemp High Performance Heaters offer all the efficiency, convenience, and reliability features you want in a pool heater, plus a lot more. As easy to use as your home heating system, plus, user-friendly indicator lights and troubleshoot icons makes system operations and monitoring a snap. The compact design and super-quiet operation won't intrude on your poolside leisure time. 


  • Superior “Best-in-Class” energy-efficiency
  • Rotating digital display allows for easy viewing, rotate to 3 positions so there’s no need to reverse the header, simplifying installation
  • Quick-change orifice allows easy conversion of gas sources
  • Compact design (21" L x 21" W x 28" H) is easy to retrofit, no matter what the space challenges
  • Tough, rustproof exterior handles the heat and weathers the elements
  • Built-in carrying handles for easy transport
  • Certified for outdoor and indoor installation
  • Certified for Low NOx emissions

Standard copper heat exchanger 84% efficient. Heavy-duty (HD) cupro-nickel heat exchanger 82% efficient.

Product Specifications

400,000 BTU
0-9,000 ft.
Heat Exchanger:
Special Feature:
Low NOx Emission

?     Asked on 12/9/2020 by Warren B Merriman

How much does a new control board cost for a Pentair Mastertemp 400 High Performance Heater. The controls on ours are non-responsive.


A  Answered on 12/28/2020 by InyoPools Product Specialist Joe S.

Hello Warren, the Control Board Kit Basic - 42002-0007Swould be PART # 6291-150.

?     Asked on 5/26/2020 by ray

the heater is not ignite can you please let me why

A  Answered on 10/21/2020 by InyoPools Product Specialist Hector F.

Hi Ray, so there may be a few reasons as to why a heater will not ignite. Please see this blog article that we put together called "The Most Common Swimming Pool Heater Problems" that may assist. 

?     Asked on 3/4/2020 by Karl Schmitt

I have a Pentair Mastertemp 400 propane heater that has failed. Is the Scratch And Dent MasterTemp Heater 400,000 BTU - LP w/ Electric Ignition Low NOx - 460737 an acceptable replacement? What are the main differences?


A  Answered on 3/5/2020 by InyoPools Product Specialist Lennox H.

Hi, Karl. This MasterTemp Heater 400,000 BTU - LP w/ Electric Ignition Low NOx - 460737 is NOT an acceptable replacement because it is NOT ASME. ASME units are designed specifically for commercial use. This unit is recommended for residential use. 

?     Asked on 12/30/2019 by

what is the LP fuel consumption per hour for a 400000 btu master temp heater.

A  Answered on 12/31/2019 by InyoPools Product Specialist Lennox H.

Hi. Approximately 4 gallon per hour per to operate this propane pool heater

?     Asked on 3/8/2019 by

Do you have this heater in the HD model? for propane?

A  Answered on 3/8/2019 by InyoPools Product Specialist Lennox H.

Hi. Unfortunately, there is not a MasterTemp 400,000 propane HD model available. 

?     Asked on 10/16/2018 by Jerilyn Nagel

I cannot find information on winterizing this pool heater - #460737.

A  Answered on 10/16/2018 by InyoPools Product Specialist Lennox H.

Hi, Jerilyn. Winterizing Instructions are located on Page 8 of the Pentair Heater Mastertemp Owners Manual.  

?     Asked on 5/2/2018 by Brian Sarty

I had a power failure at the house, now my heater has no power. I use the easy touch control system, any suggestions.

A  Answered on 5/3/2018 by InyoPools Product Specialist Hector F.

I'd recommend checking continuity going to the Easytouch and to the heater. If you do not have it to the Easytouch then you need to have electrical checked(breaker ect.) If you do but not to the heater then you may need to check the main PCB board at the Easy touch or the heater for failure. Due to electrical, I'd also recommend having a contractor inspect.  

?     Asked on 9/28/2016 by Roberto G Wantland

I have Purex Triton Max Model 400 heater for my pool, I can not find such model and I have a problem, when I turn on the heater from my pad inside the house the heater comes on for a few seconds and turns off keeps coming on and off, what could be the problem? can you refer me to a site where I can get some info. Thanks, Roberto G. Wantland

A  Answered on 9/29/2016 by InyoPools Product Specialist Andy O.

Hello Roberto- This could be a much bigger technical issue you are having.  I would suggest calling Pentair at 1-800-831-7133.

?     Asked on 5/8/2016 by Steve

Are the Master Temp heaters okay for use with salt water pools?

A  Answered on 5/10/2016 by InyoPools Product Specialist Andy O.

Steve- For a salt water pool I highly recommend a Heavy Duty model with Cupro-Nickel. The only one they offer is Natrual Gas Max-E-Therm Heater 400000 BTU Heavy Duty w/ Cupro Nickel NG Ele. Ign. SR400HD.

?     Asked on 1/6/2015 by Guest

What is the elevation rating for the Pentair MasterTemp heater?

A  Answered on 1/6/2015 by InyoPools Product Specialist Robert M.

This heater will work up to an elevation of 8,000 feet.

?     Asked on 5/12/2012 by Guest

What is the efficiency rating of this unit?

A  Answered on 5/12/2012 by InyoPools Product Specialist Patrick P.

The efficiency rating of this unit is 84.5%

?     Asked on 1/16/2012 by Guest

Will a gas heater operate at the low speed of a dual speed motor?

A  Answered on 1/16/2012 by InyoPools Product Specialist Patrick P.

Probably not - Most gas heater will shut off at low GPM levels (20-40) to keep the heater cores from overheating - 20 for 200 BTUs, 40 for 400 BTUs. Depending on your pool system you might get these GPM levels at the low speed but generally these heaters must be run at the motor's high speed.


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