Pentair | 460736 | MasterTemp 400K BTU Natural Gas Pool & Spa Heater, Low NOx
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The Pentair 460736 is a MasterTemp 400,000 BTU natural gas 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
- 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
- Compact, quiet, rustproof exterior suited to tight equipment pads
- Optional Smart Heater Bypass Valve Kit can cut operating cost by up to 35%
Specifications
- Brand: Pentair
- Manufacturer part number: 460736
- Heating capacity: 400,000 BTU
- Fuel: Natural gas
- Series: MasterTemp, TradeGrade
- Emissions: Low NOx certified
- UPC: 788379724078
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 460736 natural gas or propane?
Natural gas. Fuel is set by model. Order 460737 for the 400K BTU propane 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.
Should I choose the 460736 or the 400HD?
The 460805 MasterTemp 400HD uses a cupro-nickel heat exchanger built for saltwater, low pH, and high flow conditions. Choose the standard 460736 for typical residential water chemistry.
Does it need professional installation?
Yes. Gas 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.