Pentair 460805 MasterTemp 400HD 400K BTU Natural Gas Heater.

The Pentair 460805 MasterTemp 400HD is a high-performance natural gas heater engineered for pools and spas requiring rapid heating and long-term durability. With a robust cupro-nickel heat exchanger, it excels in harsh water conditions, including low pH and high flow environments. Its compact design ensures minimal space usage, while the rustproof exterior withstands outdoor elements.

Key Features

• High Heating Capacity: Delivers 400,000 BTUs for quick heating of pools and spas.

• Cupro-Nickel Heat Exchanger: Offers superior resistance to corrosion and scale buildup.

• Smart Connectivity: Integrates with Pentair Automation Systems for remote monitoring and control.

• Energy Efficiency: Certified for low NOx emissions, meeting eco-friendly standards.

• User-Friendly Interface: Features a rotating digital display for easy operation and diagnostics.

• Durable Construction: Compact, rustproof exterior suitable for both indoor and outdoor installations.

• Optional Smart Bypass Valve: Reduces operational costs by diverting water flow when the heater isn't needed.

The Pentair 460805 MasterTemp 400HD Heater stands out for its combination of high performance, durability, and smart features, making it a top choice for pool and spa owners seeking efficient heating solutions.

Key Features

• Supplied under part number 460805 for exact-match ordering.
• BTU rating: 400K BTU.
• 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: 460805
• Category: Pool Heaters
• Condition: New
• BTU rating: 400K BTU
• UPC / GTIN: 788379745479

Frequently Asked Questions

What part number is this pool heater?

This item is supplied under part number 460805. Match that number against your equipment's parts diagram before ordering.

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.