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Home Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 250000 BTU - EC-462027
NOTICE: The pool & spa industry continues to face industry-wide shortages on many products that most vendors expect to last late into 2022. We're allowing items to be purchased so that customers who choose to wait will have their order shipped when product is available. Most vendors are not providing any ETA on when items will be available. WE WILL EMAIL YOU RIGHT AWAY IF YOUR ITEM IS BACKORDERED. 

Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 250000 BTU - EC-462027

Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 250000 BTU - EC-462027 Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 250000 BTU - EC-462027 Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 250000 BTU - EC-462027

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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
  • Online part number EC-462027 is the direct replacement for part number 460733
  • 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 Liquid Propane
Control Type Digital
BTUH Input 250,000
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
Q & A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 15 questions Browse 15 questions and 13 answers
Do you have the hd model and what is the price?
DENNIS R on Jun 17, 2016
Will a 250,000 propane heater heat a pool with 20,000 gals of water?
Steve S on May 12, 2016
BEST ANSWER: Yes this could but it will take a very long time.
how to tell the age of a pentair pool heater?
A shopper on May 6, 2018
What is the BTU of this model?
A shopper on Oct 21, 2015
BEST ANSWER: This is rated at 250,000 BTUs
how long does it take to heat a spa with 500 gallons of water?
gladwyn l on Sep 28, 2015
BEST ANSWER: In the summer under 20 minutes 104*
In the winner under 30 minutes 104*
Will a 250,000 propane pool heater heat the water in a 20,000 gals pool ?
Steve S on May 12, 2016
BEST ANSWER: Your question really leads to other questions. Where do you live and how warm do you want to keep the pool? Above ground pools have a higher heat loss than in ground pools. How fast do you want to heat the pool? If you live in a cooler climate and are looking to extend the swimming season I would either recommend a 400,000 - 450,000 btu or 2 of the 250,000 btu heaters. With a 20,000 gal pool it would easy to setup multiple heaters. I don't know which would be more cost effective. If there is not a big price difference you could start with one and then add the second if needed. Hope this helps. If you would answer the questions I asked I could give you a better answer.
will it heat 10,500 gal pool ?
A shopper on Jun 23, 2020
BEST ANSWER: Yes we have a 15,000 gal pool and it heats quickly....approximately 2 degrees an hour.
What size is the water intake & output ?
A shopper on Jun 12, 2018
BEST ANSWER: The ports are 2 inches.
what size pool heater should I use? 18' X 50' deep end 9' and shallow end 5'
Gary C on May 24, 2017
BEST ANSWER: 350-400,000 btu for faster recovery
Pentair 250000 BTU pool heater LP gas, is this recommended for salt water pools?
Gary C on May 24, 2017
BEST ANSWER: This heater will work but we do suggest getting a heater with cupro nickel that would protect the heater from corrosion. And always use a corrosion resistant check valve.
Magic Plastics CR2® Corrosion Resistant Magna Spring-Swing Check Valve 2" | Black | SP0801-20H2
Magic Plastics CR2® Corrosion Resistant Magna Spring-Swing Check Valve 2" | Black | SP0801-20H2
I have a pentair master pool & spa gas
heater 42002-0007 what new heater can i buy to replace this one?
A shopper on Mar 23, 2021
what size heater do you need for a 24 foot round above ground pool ?
A shopper on Sep 5, 2020
I live in New Jeresy, and have a 26,000 gallon salt water in ground pool. will a 250,000 btu heater heat the water to the 80 temp in early summer?
mike w on May 20, 2018
How much propane does this use per hour?
jimbo on Jan 29, 2018
Does a licensed heating/air conditioning contractor qualify as an installer to replace a Master temp 250 propane unit?
A shopper on Apr 27, 2017
5.0 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Five Stars
Runs quieter than previous model. Works great and puts out a lot of heat in a short time efficiently. Very satisfied customer.<br>
March 9, 2017
Rated 5 out of 5
Highly recommended
It was delivered two days after ordering it! I had reservations about purchasing a large heavy unit like this online, but it arrived in perfect condition by ABF.
I installed it myself easily in about 6 hours. Only because I had to replumb do to the vertical manifold vs horizontal.
Very easy operation and it heats my 850 gal spa 15 deg in 10 minutes.
I’m a rather discerning person and would recommend this unit and pool supply company to family and friends.
June 29, 2019
over 2 years ago
Rated 5 out of 5
Pentair Mastertemp 250
Great price on heater. Fast shipping. Works as expected.
June 2, 2019
over 3 years ago
Rated 5 out of 5
Love our new heater !!
We have had our heater for a month now. I love that it heats up our 15,000 oval above ground pool quickly.....about 2 degrees an hour. Very happy with it so far.
August 10, 2020
1 year ago
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Register your Pentair product online at www.pentair.com.

You've always been able to count on the quality and long service life of Pentair products. Pentair uses state of the art workmanship, materials and manufacturing processes to create the most innovative pool and spa equipment anywhere. And now Pentair products can deliver even more value and peace of mind, because Pentair offers extended warranty coverage on select products that are installed by a qualified installer*.
While the majority of Pentair products are covered by a sixty- (60) day warranty, a select number of products qualify for extended warranty coverage.
Select Bundled Products: applies to purchases and qualified installation of a minimum of a pump and filter, and one or more of the following: heaters, heat pumps, control systems, automatic cleaners, lighting, salt chlorine generators or UV sterilizer**
*Note: Qualified Installer - Defined as a licensed professional who charges a fee for his services, and possesses a business license, contractor's license and/or resale permit. Common examples of a "qualified installer" include: Swimming Pool, Home Repair or Landscape Professional; Plumber or Electrician; General Contractor; Heating and Air Conditioning Specialist.
**Note: Bundled products - must be purchased on the same invoice and installed at the same time. If any product within a bundle is ineligible for the bundled warranty coverage then all products within the same bundle will be disqualified from receiving the three (3) year extended warranty coverage for bundled products.
TradeGrade products must be purchased from a retail store (brick & mortar), pool builder or pool service company to receive a one-year, two-year or three-year warranty. If purchased online will only receive a sixty-day limited warranty. View the list of TradeGrade Products.
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.
Visit www.pentair.com to submit your product warranty registration.
This information was updated on 11/19/2021. For the most current information and full warranty policy please visit www.pentair.com/warranty.

 Adobe Acrobat PDF Warranty Information
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