Pentair | 460737 | MasterTemp 400K BTU Propane Pool & Spa Heater, Low NOx
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The Pentair 460737 is a MasterTemp 400,000 BTU liquid propane pool and spa heater, the top output in the standard MasterTemp line. It is part of Pentair's TradeGrade line, with Low NOx certified combustion, a rotating digital display, and connectivity to Pentair automation systems.
Features
- 400,000 BTU output for large pools and fast spa recovery
- Runs on liquid propane where natural gas service is unavailable
- Low NOx certified combustion meets clean air standards in regulated regions
- Rotating digital display with menu driven diagnostics
- Digital ignition control module and flame strength sensor
- Connects to Pentair automation systems for remote control and push alerts
- Manual gas shut-off simplifies servicing
- Optional Smart Heater Bypass Valve Kit can cut operating cost by up to 35%
Specifications
- Brand: Pentair
- Manufacturer part number: 460737
- Heating capacity: 400,000 BTU
- Fuel: Liquid propane
- Series: MasterTemp, TradeGrade
- Emissions: Low NOx certified
- UPC: 788379724085
Frequently Asked Questions
What size pool does a 400,000 BTU heater suit?
It is the largest standard MasterTemp and suits large in-ground pools, pool and spa combinations, and cold climates where recovery time matters. Sizing depends on surface area, temperature rise, and climate, so have a pool professional size it for your install.
Is the 460737 propane or natural gas?
Liquid propane. Fuel is set by model. Order 460736 for the 400K BTU natural gas version.
Is the MasterTemp Low NOx compliant?
Yes. MasterTemp heaters are Low NOx certified, which is required in California and other regulated air quality districts.
Does it work with pool automation?
Yes. It integrates with Pentair automation systems for remote temperature control, scheduling, and push notifications on heater status.
Is the Smart Heater Bypass Valve Kit worth adding?
It diverts water around the heater when heating is not called for, which reduces flow restriction and pump load. Pentair rates the savings at up to 35% of annual operating cost. It is sold separately.
Will a propane heater cost more to run than natural gas?
Usually yes, since propane is billed by the gallon and generally costs more per BTU delivered than piped natural gas. Choose propane when natural gas service is not available at the property.
Does it need professional installation?
Yes. Propane sizing, venting, electrical, and local code make this a licensed installer job, and improper installation can affect warranty coverage.
Sold by AppaeTech Pool Supply, an authorized Pentair reseller.