MasterTemp Heater 300,000 BTU - NG w/ Electric Ignition Low NOx - 460734



Model # 460734

By Pentair Pool Products

  5 Average  



Model # 460734

Warranty 2 Years Parts & Labor

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

300,000 BTU
0-9,000 ft.
Heat Exchanger:
Special Feature:
Low NOx Emission

?     Asked on 6/13/2019 by Bob

What size is the piping on this unit, 2 inch or 1.5 inch?

A  Answered on 6/15/2019 by InyoPools Product Specialist Lennox H.

Hi, Bob. This unit has 2" plumbing connections.

?     Asked on 6/23/2018 by Mike

What are the electrical specs on this unit, amperage @ 120v and 220 volts! Thanks

A  Answered on 6/27/2018 by InyoPools Product Specialist Hector F.

These units come capable to be wired to 120 or 240 volts. 

?     Asked on 12/11/2017 by wally

How much does it weigh? "Lightweight" is a relative and useless description.

A  Answered on 12/11/2017 by InyoPools Product Specialist Kevin G.

This product weighs 136lbs. 

?     Asked on 2/13/2017 by shane

I keep my pool set to 95 degrees during the winter. we swim everyday. every three or four days the heater shuts down and says to service. I shut it off and then back on and it fires right back up and runs for several days. then does the same thing?????????? any help there. all pentair equipment heater is a 460734 300 mastertemp date made 5/3/14 i have had several pool companies out to look at it and nobody can figure it out... HELP

A  Answered on 2/13/2017 by InyoPools Product Specialist Scott W.

Hi Shane, Have you given Pentair a call, it sounds like an electrical part has gone bad?

?     Asked on 5/30/2015 by Johnny

Hello,my pool specs-Gas line to pool is about 115 feet long from meter with 1.5 inch pipe to pad and 1 inch to old heater. WhisperFlo pump w/1.5 HP AO Smith B842 motor (WPE -6). 47 feet head Power available is 230 v to the old heater Pool is 16x36 avg depth 5 feet Filter is Aquatec - FNSP 48 Do you see any required flow, power, or natural gas that would limit replacing my burnt out Rheem with this system.

A  Answered on 6/13/2015 by InyoPools Product Specialist Lennox H.

Johnny, You'll need to have a 1.5" pipe size for the gas supply to the unit and a manual bypass installed in order to have the MasterTemp Heater 300,000 BTU, NG w/ Electric Ignition, Low NOx installed. You can find all this information in the Pentair Heater Mastertemp Owners Manual.

?     Asked on 5/21/2015 by John

What size pump would I need for this heater? Is 3/4 hp enough. Also is this big enough for an 18x36 inground?

A  Answered on 5/22/2015 by InyoPools Product Specialist Brian M.

I would suggest a 1hp pump ( depending on the size of the filter you have ) The filter has a max Gallons Per Minute. The heater would work with a 3/4, but you may not get the water turn-over required for that many gallons. Also, the larger the BTU's, the quicker the water will heat. 300,000 is plenty, as long as you have some form of heat retention - like a solar blanket of a liquid solar blanket call Cover Free. It works as good as a solid blanket without the hassle.

?     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 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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