The Pentair MasterTemp 460737 Propane Pool Heater delivers 400,000 BTU of robust heating power and dependable performance for residential pool owners who demand quick warm-ups, energy efficiency, and long-term reliability. Fueled by propane gas and operating on 120/240V power, this heater combines high-capacity output with a compact footprint, quiet performance, and easy installation.

With an efficient heat exchanger and digital temperature controls, the MasterTemp 460737 provides consistent, comfortable water temperature for extended swim seasons. Built with rugged composite materials, corrosion resistance, and industry-trusted safety features, this heater is ideal for pools that require powerful heating without sacrificing ease of use or durability.

Pentair MasterTemp 460737 Propane Pool Heater Compatibility

• Designed for propane fuel systems with standard propane hookups.

• Works with 2” pool plumbing connections in most residential installations.

• Compatible with Pentair and many third-party pool automation controls (IntelliCenter®, EasyTouch®, IntelliTouch®).

• Suitable as a replacement for Max-E-Therm®, MasterTemp®, and similar 400K BTU propane heaters.

• Integrates with variable-speed pump and modern filtration setups.

• Pentair 460737
• Pentair MasterTemp
• Pentair MasterTemp 460737
• MasterTemp 400K
• 400000 BTU Pool Heater
• Propane Pool Heater
• LP Gas Pool Heater
• Pool & Spa Heater
• Pentair Pool Heater
• High Efficiency Pool Heater

Key Features

• Compatible replacement built to Pentair specification 460737 — not manufactured by Pentair.
• BTU rating: 400,000 BTU.
• Voltage: 240V.
• Sized by BTU output — match the rating and fuel type to your existing unit.
• Ships from our US warehouse with tracking on dispatch.

Specifications

• Brand: Pentair
• Manufacturer part number: 460737
• Category: Pool Heaters
• Condition: New
• BTU rating: 400,000 BTU
• Voltage: 240V
• UPC / GTIN: 788379724085
• Shipping weight: 136 lb

Frequently Asked Questions

Is the 460737 an original Pentair part or a compatible replacement?

The 460737 is a compatible replacement built to match Pentair specification. It is not manufactured by Pentair and carries no Pentair branding or warranty.

Does the BTU rating have to match my old heater?

The BTU rating should match or exceed your previous heater. Undersizing means the pool never reaches temperature on cold days; oversizing costs more up front but heats faster and cycles less.

Can this run on propane instead of natural gas?

No. Gas pool heaters are built for one fuel and require a manufacturer conversion kit to change. Check the data plate on your existing unit and order the matching fuel type.

What size heater do I need for my pool?

A common rule is 1 BTU per gallon as a minimum, increased for windy sites, uncovered pools, or cold climates. A 20,000 gallon pool typically starts at 250,000 BTU.

Do I need a professional to install a pool heater?

Gas heaters involve gas line sizing, venting and electrical connections, and most jurisdictions require a licensed installer plus a permit. Improper installation voids the manufacturer warranty.

How do I confirm this part fits my equipment?

Check the part number stamped on the component you are replacing, or find it on the parts schematic in your owner's manual. If the number differs or is unreadable, send us your equipment model and serial number and we will verify fitment before you order.

How quickly does this ship?

In-stock items ship from our US warehouse on business days. You will receive tracking by email once the order leaves the warehouse.

Can I return it if I ordered the wrong part?

Unopened, uninstalled items can be returned within 30 days. Equipment that has been installed or plumbed cannot be returned, so confirm fitment before installation.

Is this covered by a warranty?

Manufacturer warranty terms vary by brand and product. Warranty claims generally require proof of purchase and, on installed equipment, evidence of professional installation.