Pentair Mastertemp 250K BTU Heater Natural Gas | 460732
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.
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Heating Capacity: 250,000 BTU Input
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Fuel Type: Natural Gas
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Electrical: 120/240 V Single Phase, 60 Hz
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Weight: ~132 lbs
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Warranty: 2 Years (when professionally installed)
Call-out Badges: Low NOx Certified • Eco-Select Choice • Compact Design
Ideal For
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Residential pool owners wanting fast heating for medium to large pools or spas
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Replacing older, inefficient gas heaters with a modern high-efficiency unit
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Equipment pads with limited space that require a compact footprint
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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
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Energy Efficient: Consumes less gas for each degree of heating delivered
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Fast Heat Recovery: Quickly brings water back to set temperature after use
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Durable Construction: Composite exterior and stainless-steel internals stand up to weather and chemicals
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Quiet Operation: Engineered air intake and combustion for minimal noise on the pad
Specs & What’s in the Box
Specifications
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Dimensions: 23″ W × 32.6″ D × 28″ H
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Weight: ≈132 lbs
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Materials: Rugged composite cabinet with copper heat exchanger
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Gas Connection: ¾″ NPT
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Electrical: 120/240 V single-phase connection
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Fuel Type: Natural Gas
In the Box
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Pentair MasterTemp 250 Natural Gas Heater (460732)
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User manual & installation guide
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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
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⭐⭐⭐⭐⭐ Pentair’s most trusted medium-capacity heater
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Backed by a two-year limited warranty
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Supported nationwide through Pentair’s authorized dealer network
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Designed and assembled in the USA
Install Steps (Compact)
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Turn off power and gas supply
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Remove old heater and prepare plumbing connections
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Mount unit level on pad and connect water and gas lines
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Wire to 120/240 V service and configure controls
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Test for proper operation and check for leaks