Home Pool Pool & Spa Heaters Pentair & Sta-Rite Pool & Spa Heaters Pentair MasterTemp Low NOx Pool & Spa Heater - Dual Thermostat - Electronic Ignition - Natural Gas - 175,000 BTU - 460792
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Pentair MasterTemp Low NOx Pool & Spa Heater - Dual Thermostat - Electronic Ignition - Natural Gas - 175,000 BTU - 460792

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Pentair MasterTemp Low NOx Pool & Spa Heater - Dual Thermostat - Electronic Ignition - Natural Gas - 175,000 BTU - 460792 Pentair MasterTemp Low NOx Pool & Spa Heater - Dual Thermostat - Electronic Ignition - Natural Gas - 175,000 BTU - 460792 Pentair MasterTemp Low NOx Pool & Spa Heater - Dual Thermostat - Electronic Ignition - Natural Gas - 175,000 BTU - 460792

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  • Heats Up Fast so No Long Waits Before Enjoying your Pool or Spa while Achieving Best-In-Class Efficiency.
  • High Efficiency Rating Makes these Heaters Extremely Economical to Operate.
  • Rotating Digital Display Allows for Easy Viewing.
  • Tough, Rust Proof Exterior Handles the Heat and Weathers the Elements.
  • Improved Resistance to Rodent Intrusion
  • Pentair Sta-Rite 4x6 Metal Flue Collar for Indoor Vertical Venting - Negative Pressure for Distance Less Than 8' | 77707-0076
    Indoor Vertical Venting - Negative Pressure 4x6 Metal Flue Collar for Distances Less Than 8' | 77707-0076

  • Pentair Sta-Rite 4x8 Metal Flue Collar for Indoor Vertical Venting - Negative Pressure for Distances Over 8' | 77707-0077
    Indoor Vertical Venting - Negative Pressure 4x8 Metal Flue Collar for Distances Over 8' | 77707-0077

  • Pentair 4" Stainless Steel Appliance Adapter for Horizontal or Vertical Positive Pressure by Heatfab | 77707-0086
    4" Appliance Adapter Horizontal or Vertical Venting, Positive Pressure by Heatfab | 77707-0086

  • Pentair 4" Stainless Steel Appliance Adapter for Horizontal or Vertical Positive Pressure Venting by Z-Flex | 77707-0087
    4" Appliance Adapter for Horizontal or Vertical Positive Pressure Venting by Z-Flex | 77707-0087

 Ultra-High Performance in a Compact, Quiet & Eco-Friendly Design
MasterTemp 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 make system operation and monitoring a snap. The compact design and super-quiet operation won't intrude on your poolside leisure time.
MasterTemps easy-to-read controls make system operation and monitoring simple. Pool and spa temperatures can be pre-set and controlled with the push of a button. A digital display indicates the water temperature, and five LED lights give you system status and let you know if the heater needs service.
New Improved Rodent Resistance for the MasterTemp High Performance Heater
The engineers made improvements to reduce gaps and eliminate access points, including advancements to the heater base, all exterior side panels and louvers, the gas valve and water manifold openings, the exhaust opening and the exhaust cover. These subtle, but important, design changes add up to a better heater, from every angle.
In addition to the new rodent resistant improvements, the features and benefits of a MasterTemp High Performance Heater include:
  • Enhanced LCD display and diagnostics include easy to display and front-facing error messages and icons
  • Best-in-class energy efficiency
  • Eco-friendly certified for low, NOx emission and outperforms industry standard
No matter what you're seeking in your swimming pool heater, MasterTemp measures up. Compare this list of features to any other and you'll see why MasterTemp is setting a new standard for total value:
  • Very compact design for such a high performance heater allows for smaller overall equipment pads that won't intrude on your poolscape.
  • Easy to install or retrofit in even the tightest spaces.
  • A fully pre-mixed system with a highly efficient air and gas mixture lets MasterTemp heat up fast. No long waits before enjoying your pool or spa.
  • Compare energy efficiency ratings and you'll find MasterTemp at the top of the list. Comfort and economy can go together.
  • With a hot surface ignition (no pilot light) and pushbutton, digital controls, MasterTemp is as easy to operate as your home heating system. Plus, user-friendly indicator lights make system operation and monitoring a snap.
  • The easy-to-view, rotating digital display places controls front and center, no matter how MasterTemp is positioned on your equipment pad.
  • MasterTemp is engineered for super-quiet operation and won't intrude on your poolside leisure time.
  • A tough, composite exterior handles the heat and weathers the elements.
  • Safe operation is assured through a series of features, including; a water pressure switch that senses the pump is running to prevent overheating; high limit switches assure the heater turns off if water temperature exceeds factory set limits; manual gas shut-off when service is required; stack flue sensor also guards against overheating.
  • Approved for installation on combustible surfaces.
Why MasterTemp Heaters are the "Greenest" Choice
An Eco Select Brand: MasterTemp Heaters offer best-in-class energy efficiency. Plus, they are certified for low NOx emissions, making them eco-friendly favorites. In fact, MasterTemp outperforms current industry standards for air pollution exhaust.
The Eco Select Brand identifies Pentair's "greenest" and most efficient equipment choices. These products save energy, conserve water, eliminate noise or otherwise contribute to a more environmentally responsible equipment system. 
As the global leader in pool and spa equipment manufacturing, Pentair strives to provide greener choices.
Brand Pentair
Sub Brand MasterTemp
Item Low NOx Pool and Spa Heater
Type High Performance
Gas Type Natural Gas
Control Type Digital
BTUH Input 175,000
Cabinet Width 23.02"
Cabinet Depth 32.61"
Cabinet Height 28.15"
Gas Connection 3/4"
Water Connection 2"
Voltage Rating 120/240 VAC
Frequency Rating 60 Hz
Phase 1-Phase
Flow Rate 120 gpm

Brand: Pentair
BTU Rating
Gas Type
Natural Gas
Q & A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 22 questions Browse 22 questions and 20 answers
my above ground pool is 15x30x4 what size heater do you recommend?
charlie on May 6, 2016
i had a top vented heater for my indoor pool . does this heater vent from the top or side ( 175,000 btu pentair ) ?
roc b on Jun 16, 2016
The heater turns on and in 6-10 secs. the temp. goes up and shaking and shuts off. Is the heating unit clogged?
A shopper on Aug 9, 2016
BEST ANSWER: The temp rapidly rising and shutting off sounds like a high limit switch has gone bad. Not sure what the shaking could be. I would recommend getting a licensed technician out to look at your heater.
A shopper on Mar 31, 2016
BEST ANSWER: We have a blog on how to size your heater, but basically you want to measure out your pool and determine the size that way.
I currently have a propane heater that needs to be replaced. Can this heater be used with propane?
Jeff H on Mar 12, 2017
BEST ANSWER: Yes it can but you would have to buy the propane model or conversion kit.
By pool Is 40 by 10 by 5 what heater size and what warranty comes with it?
Maurice on May 31, 2016
BEST ANSWER: This unit should work for your size pool, it is 175K BTU heater. I have this heater, my pool is only 21' round but I know this is over kill for mine but this unit has a 2 year warranty unlike most heaters.
spa heating only?
A shopper on Jan 2, 2017
BEST ANSWER: No, this heater is for both pool and spa. I use it on a 24' round above ground. It has been a great heater. Going into its third season.
what size gas pipe is required?
Randy o on Nov 7, 2016
BEST ANSWER: 3/4 should be fine but a lot of it depends on the distance the heater is from the main gas line
Can this heater be converted to LP?
aaron h on May 17, 2018
They make a model for LP
installation cost?
David S on May 8, 2016
BEST ANSWER: They charged me $200 to install. Still cheaper than what they were going to charge me to buy through them.
Can it heat a 15k gallon pool?
A shopper on Mar 28, 2020
BEST ANSWER: The pool we put this in was about 12000 gallons . Heats up very quickly.
how to heat spa and flow over in to the pool ?
Jackie T on Dec 15, 2015
BEST ANSWER: That would be determined by how your pool system is plumbed.
A shopper on Nov 3, 2015
BEST ANSWER: The HD model will indicate the Heavy Duty Cupro Nickel heat exchanger.
What size unit for a 20x40x5 pool?
Robert Z on Oct 1, 2020
i cant get it to ignite, what s
should i do?
DON M on Jul 3, 2020
is there a filter on the unit that may need to be cleaned that is lighting up my service unit light and if so how do i get to it?
LARRY H on Apr 8, 2020
Can I hook up my electronic valve actuators directly to this heater ?
Eddie on Apr 17, 2019
I currently have Pentair master400 for my spa, rats have chewed up the wiring. Should I try to re-wire or replace whole unit? And to replace, do you have anyone that can install?
A shopper on Mar 8, 2019
which model is good for 22000 gallons pool ?
AINALAKIS g on Aug 19, 2017
Love my Pentair Master Temp heater , but the heater service light went on and I cant turn heater off. it's stuck with the spa heater on at 80 degrees. Can you tell me what I should do ? I had my pool guy look at it and he is puzzled.
mark f on Jun 23, 2017
heater wont stay on what doe E05 mean?
Dave P on Apr 1, 2017
4.6 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 4 out of 5
Reliable heater
The electronic display really helps me to understand how to use it. My water heats up quickly so I've saved on my gas bill. Positive outcome from this purchase.
March 7, 2016
Rated 5 out of 5
High Performance
This is a real plus in my book. Ive been in the pool industry for quite some time and this Pentair heater has a reputation for being one of the best on the market. This product arrived on time and as expected. It puts off a little odor while it primes the heater, but its not that bad, and if youre not right on top of it, you probably wont notice it. So far, it works great and heats FAST best of all.
June 3, 2016
Rated 5 out of 5
Best thing I ever did is purchase this heater works great and heats up my pool quickly
January 2, 2017
over 6 years ago
Rated 5 out of 5
Excellent Heater
Excellent Heater with electronic ignition. Heater arrived before promised!
October 24, 2016
over 4 years ago
Rated 4 out of 5
Thanks neighbor
My neighbor has one of these and recommended I get this heater from you guys. It's been doing an outstanding job. Thank you for a reliable product. And thanks to your customer service for answering all my questions.
June 7, 2016
Rated 4 out of 5
Good Buy
Great heater for space-challenged areas. Relatively easy to install and works great. I appreciate the large digital display which makes it quick and easy to read.
July 9, 2014
Rated 5 out of 5
What an awesome heater! Literally brought the temp of our 700 gallon hot tub up to from 75 degrees to 100 in a matter of an hour.
June 6, 2017
over 5 years ago
Rated 5 out of 5
Master temp heater
I recommend this heater. Easy to install and start up. Works well and heats water fast. Waiting on first bills to check costs.
October 1, 2018
over 3 years ago
Rated 4 out of 5
Wonder heater
Shopped around, online and local stores and this was the best price. This heater replaced a broken heater and I am very happy with performance. <br>
March 9, 2017
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Register your Pentair product online at www.pentair.com.

  • LIMITED WARRANTY: Pentair warrants its products to be free from defects in material and/or workmanship for a period of sixty (60) days (parts only) from the original date of purchase and/or installation. Customer agrees to prepay all shipping charges to Pentair.
  • EXTENDED WARRANTY: To receive a product extended warranty (longer than 60 days from the original date of installation), customer must:
  1. Register the product;
  2. Provide a copy of the sales receipt; and
  3. Provide a copy of the installation invoice, provided by the qualified installer, within 60 days of installation (if required). Certain products do not require qualified installation but still require product registration and copy of the sales receipt to receive the extended warranty.
  • TRADEGRADE WARRANTY: TradeGrade products must be purchased from a retail store (brick and mortar), pool builder or pool service company. If purchased online (via internet) the product will only receive a sixty (60) day limited warranty. View the list of TradeGrade products here.
  • ECOMMERCE (EC) WARRANTY: Products purchased from an Authorized Pentair Online Reseller 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. To receive an eCommerce warranty, customer must:
  1. Register the product, and
  2. Provide a copy of the sales receipt
Visit www.pentair.com to submit your product warranty registration.
This information was updated on 04/05/2021. For the most current information and full warranty policy please visit www.pentair.com/warranty.

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