Product Overview

Pentair MasterTemp 250 (460732) – High-Performance 250,000 BTU Natural Gas Pool & Spa Heater
Powerful, compact, and efficient — the MasterTemp 250 delivers precise heating performance for medium-to-large residential pools. Its smart design combines fast warm-up, quiet operation, and a corrosion-resistant build so you get the comfort of warm water whenever you want it.

• Heating Capacity: 250,000 BTU Input

• Fuel Type: Natural Gas

• Electrical: 120/240 V Single Phase, 60 Hz

• Weight: ~132 lbs

• Warranty: 2 Years (when professionally installed)

Call-out Badges: Low NOx Certified • Eco-Select Choice • Compact Design

Ideal For

• Residential pool owners wanting fast heating for medium to large pools or spas

• Replacing older, inefficient gas heaters with a modern high-efficiency unit

• Equipment pads with limited space that require a compact footprint

• Homeowners seeking eco-friendly operation with low NOx emissions

Key Features

250,000 BTU High Output — Heats water quickly and efficiently for comfortable swimming even in cooler weather.
Why it matters: Faster heat-up times mean more time enjoying the pool.

Compact & Lightweight Housing — Rugged composite cabinet resists rust and corrosion while saving pad space.
Why it matters: Ideal for tight equipment areas and coastal installations.

User-Friendly Digital Controls — Rotating display and self-diagnostics for easy setup and maintenance.
Why it matters: Convenient control and troubleshooting with clear readouts.

Low NOx Burner System — Exceeds emission standards while maintaining high thermal efficiency.
Why it matters: Environmentally responsible heating with lower operating costs.

Benefits

• Energy Efficient: Consumes less gas for each degree of heating delivered

• Fast Heat Recovery: Quickly brings water back to set temperature after use

• Durable Construction: Composite exterior and stainless-steel internals stand up to weather and chemicals

• Quiet Operation: Engineered air intake and combustion for minimal noise on the pad

Specs & What’s in the Box

Specifications

• Dimensions: 23″ W × 32.6″ D × 28″ H

• Weight: ≈132 lbs

• Materials: Rugged composite cabinet with copper heat exchanger

• Gas Connection: ¾″ NPT

• Electrical: 120/240 V single-phase connection

• Fuel Type: Natural Gas

In the Box

• Pentair MasterTemp 250 Natural Gas Heater (460732)

• User manual & installation guide

• Mounting hardware and fittings

Compatibility & Replacements

Works with: Most standard in-ground pool and spa systems using natural gas supply
Replaces: Older Pentair MiniMax and similar 200–250K BTU heaters
Not compatible with: Propane systems (use model 460733) or ASME-certified installations (model 461021)

Trust Builders

• ⭐⭐⭐⭐⭐ Pentair’s most trusted medium-capacity heater

• Backed by a two-year limited warranty

• Supported nationwide through Pentair’s authorized dealer network

• Designed and assembled in the USA

Install Steps (Compact)

1. Turn off power and gas supply

2. Remove old heater and prepare plumbing connections

3. Mount unit level on pad and connect water and gas lines

4. Wire to 120/240 V service and configure controls

5. Test for proper operation and check for leaks