Product Overview

The Pentair MasterTemp 400 Propane Gas Heater 460737 is a high-output pool and spa heater designed for fast, dependable heating on larger residential pool systems. With 400,000 BTUs of heating power, propane / LP gas operation, and 120/240 VAC electrical capability, this heater is an excellent choice for pools and spas where natural gas is not available.

The MasterTemp 400 propane model delivers powerful heat-up performance in a compact cabinet, making it one of Pentair’s most popular heater options for large pools, attached spas, and pool/spa combination systems that need quick temperature recovery.

Ideal For

Large residential swimming pools

Pool and spa combination systems

Propane / LP gas pool heating applications

Homes without natural gas service

Customers wanting fast heat-up and quick spa recovery

Homeowners replacing an existing 400K BTU propane heater

Equipment pads with limited space

Residential systems needing maximum MasterTemp heating capacity

Key Features

400,000 BTU propane heating performance

Propane / LP gas operation

120/240 VAC electrical capability

Compact MasterTemp cabinet design

Digital control panel for easy temperature adjustment

Rotating display for easier viewing and service access

Hot-surface ignition with no standing pilot

Low NOx certified heater design

Quiet operation for residential equipment pads

Rust-resistant composite exterior cabinet

Manual gas shutoff for service convenience

Designed for fast pool and spa warm-up

Compatible with many pool and spa automation systems

Benefits

The Pentair MasterTemp 400 Propane Heater gives pool owners maximum MasterTemp heating capacity in a compact, efficient design. Its 400K BTU output provides fast heat-up for larger pools and attached spas, making it ideal for customers who want quick temperature recovery and reliable seasonal heating.

Because this model runs on propane, it is a strong option for homes without natural gas service or equipment pads already set up for LP gas. The digital control panel makes operation simple, while the compact footprint helps simplify replacement or installation on many residential pool pads.

Specifications

Compatibility & Ordering Notes

Confirm this is the correct propane / LP gas model before ordering.

Verify that 400,000 BTUs is properly sized for the pool or spa application.

Confirm propane supply, regulator setup, gas line size, electrical requirements, plumbing layout, venting requirements, equipment pad clearances, and local code requirements before installation.

This model is not for natural gas systems. For natural gas applications, use the correct natural gas MasterTemp model.

Professional installation is strongly recommended.

Installed or used heaters may not be eligible for return.

Customer-Facing Q&A

Q: Is Pentair 460737 natural gas or propane?
A: Pentair 460737 is the propane / LP gas version of the MasterTemp 400 heater.

Q: How many BTUs is this heater?
A: This heater is rated at 400,000 BTUs.

Q: Can this heater run on 120V or 240V?
A: Yes. This model is designed for 120/240 VAC single-phase operation.

Q: What is the barcode for Pentair 460737?
A: The barcode is 788379724085.

Q: Does this heater use a standing pilot light?
A: No. The MasterTemp 400 uses hot-surface ignition and does not require a standing pilot.

Q: Is this heater good for large pools?
A: Yes. The 400K BTU size is a strong fit for larger residential pools, attached spas, and pool/spa combinations that need fast heat-up. Proper sizing depends on pool volume, desired temperature rise, climate, and whether a pool cover is used.

Q: Can this heater connect to automation?
A: Yes. The MasterTemp platform can connect with compatible pool and spa automation systems.

Q: Is professional installation recommended?
A: Yes. Gas pool heaters should be installed by a qualified professional to ensure proper propane supply, gas line sizing, electrical, plumbing, venting, and safety setup.

Q: What should I verify before ordering?
A: Confirm fuel type, BTU sizing, propane supply, gas regulator setup, gas line size, electrical requirements, plumbing compatibility, installation clearances, venting requirements, and local code requirements.