Pentair MasterTemp ASME Pool Heater 460771 – 250K BTU Natural Gas, Commercial-Grade Heating, 120/240V
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The Pentair MasterTemp ASME Pool Heater 460771 is a commercial-grade natural gas pool heater engineered for reliable, high-performance heating in demanding residential and commercial environments. With a 250,000 BTU output, this heater delivers rapid heat-up times while maintaining excellent energy efficiency and consistent temperature control.
Built to meet ASME standards, the MasterTemp 460771 features a rugged, corrosion-resistant cabinet, a high-efficiency heat exchanger, and advanced electronic controls. Its compact design allows for flexible installation on crowded equipment pads, making it ideal for facilities that require both performance and compliance.
Pentair MasterTemp ASME Pool Heater 460771 Compatibility
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Designed for natural gas pool and spa systems
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Suitable for commercial pools, apartments, hotels, schools, and high-end residential pools
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Compatible with Pentair automation systems including IntelliCenter®, EasyTouch®, and IntelliTouch®
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Works with standard 2” pool plumbing connections
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Integrates with variable-speed pumps and modern filtration systems
Frequently asked questions
How do I size a pool heater?
Heater sizing follows pool surface area, the temperature rise you want and how exposed the pool is to wind. A larger BTU rating heats faster and cycles less; an undersized heater runs continuously and still struggles on cold nights. Gas heaters also need a gas line and meter capacity that can supply their rated input.
What is the part number for this heater component?
Pentair lists this heater component under part number 460771. Quote 460771 when you cross-reference against your equipment manual, an existing part, or a parts diagram, so you are comparing the same revision.
What routine maintenance does a pool heater need?
Keep water chemistry balanced, because low pH and high calcium hardness are the two most common causes of premature heat exchanger failure. Beyond that: keep the cabinet clear of debris, check for rodent nests before each season, and have the burner and gas train inspected periodically.
How do I confirm this fits my equipment?
Match the part number stamped on the component you are replacing, or look it up in the parts list for your Pentair equipment. If your model or serial number is not named on this page, send it to us before you order and we will confirm the fit.
Is this the complete heater or a replacement part?
Check the title and the specification section above. Heater listings and heater component listings share the same part-number format, so confirm whether you are buying a full appliance or a single serviceable component before ordering.
Is there a warranty on this heater component?
It carries the standard Pentair manufacturer warranty. The terms are set by Pentair, and on some equipment the coverage only applies when a licensed professional performs the installation. Keep the receipt and packaging until you have confirmed correct operation.