The Pentair ETi 250 Pool Heater (461112) is a high-efficiency natural gas heating solution engineered for demanding residential and commercial applications. With a 250,000 BTU/hr output, the ETi Series provides powerful heating that delivers fast warm-up times and consistent temperature control.

Built with quality components, advanced combustion technology, and an optimized heat exchanger, the ETi 250 model maximizes fuel transfer and energy efficiency while minimizing operating costs. Its rugged design and reliable electronics make it an excellent choice for pool facilities requiring dependable performance day after day.

Pentair ETi 250 Pool Heater (461112) Compatibility

• Designed for natural gas pool and spa systems

• Works with standard 2” plumbing connections found in most residential and commercial installations

• Integrates with Pentair automation systems including IntelliCenter®, EasyTouch®, and IntelliTouch®

• Compatible with variable-speed pumps, modern filtration systems, and popular pool controllers

• Suitable as a replacement for like-capacity natural gas heaters in existing equipment pads

Key Features

• Supplied under part number 461112 for exact-match ordering.
• BTU rating: 250K 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: 461112
• Category: Pool Heaters
• Condition: New
• BTU rating: 250K BTU
• UPC / GTIN: 788379877491
• Shipping weight: 270 lb

Frequently Asked Questions

What part number is this pool heater?

This item is supplied under part number 461112. 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.