Product Overview

The Pentair MasterTemp ASME 250 Heater | 460772 is a high-performance propane gas pool and spa heater designed for demanding residential and commercial heating applications. With 250,000 BTU heating capacity, this model provides fast, reliable heating for pools, spas, and pool/spa combination systems.

This MasterTemp ASME model is built with ASME-certified construction, making it suitable for commercial-grade applications and installations where ASME heater requirements apply. It features Low NOx performance, digital controls, electronic ignition, and a compact, quiet MasterTemp cabinet design.

Designed for liquid propane gas, the 460772 includes a bronze header design and copper heat exchanger, helping deliver dependable heat transfer and long-term serviceability in properly maintained pool and spa systems.

Ideal For

• Commercial pool and spa systems
• Heavy-use residential pools
• Pool and spa combination systems
• Medium to large pool heating applications
• Propane gas equipment pads
• Properties without natural gas service
• Applications requiring ASME-certified heater construction
• Replacing older 250K BTU propane heaters
• Low NOx propane heater installations
• Hotels, health clubs, apartments, and HOA pools where approved
• Professional pool heater installations

Key Features

• 250,000 BTU heating capacity — provides strong heating performance for pools and spas.
• Propane gas operation — designed for liquid propane / LP gas systems.
• ASME-certified construction — built for commercial-grade and code-specific applications where ASME certification is required.
• Low NOx design — engineered for cleaner combustion and reduced emissions.
• Digital IID controls — user-friendly digital interface with indicator lights for operation and monitoring.
• Electronic ignition — reliable startup without a standing pilot light.
• Bronze header design — commercial-grade header construction with service-friendly access.
• Copper heat exchanger — provides efficient heat transfer for pool and spa heating.
• Compact MasterTemp cabinet — powerful heating performance in a space-saving footprint.
• Quiet operation — designed to reduce equipment noise around the pool area.
• Rotating digital display — allows easier viewing and control access in different equipment pad layouts.
• 120/240VAC electrical compatibility — supports common pool heater electrical configurations when installed correctly.

Benefits

The Pentair MasterTemp ASME 250 Propane Heater is built for pool systems that require reliable heat output, commercial-grade construction, and efficient operation. Its 250K BTU size provides a balanced heating option for medium-size pools, spas, and heavier-use systems.

The ASME construction helps meet requirements for many commercial and code-regulated installations, while the MasterTemp platform offers compact sizing, quiet performance, and easy-to-use digital controls.

For pool professionals, the 460772 is a dependable propane ASME heater option with Low NOx operation, bronze headers, and a proven MasterTemp design.

Specifications

Included Components

• 1 × Pentair MasterTemp ASME 250 propane gas pool and spa heater
• ASME-certified heater assembly
• Bronze header assembly
• Copper heat exchanger
• Digital control system
• Electronic ignition system
• Manufacturer-supplied installation documentation

Propane gas line, gas shutoff valve, regulator if required, electrical wiring, bonding materials, venting components, plumbing valves, unions, check valves, pressure relief valve if required by local code, equipment pad materials, automation wiring, and installation labor are sold separately unless specifically included by the supplier.

Compatibility Notes

This heater is designed for compatible propane gas pool and spa heating systems requiring a 250K BTU ASME heater.

Common application references include:

• Commercial pool and spa heating systems
• Heavy-use residential pools and spas
• Propane / LP gas equipment pads
• 250K BTU heater replacement applications
• ASME-certified heater applications
• Low NOx propane heater installations
• Systems requiring bronze header construction
• Pool and spa systems using 2" water connections

Always confirm fuel type, BTU requirement, ASME requirement, gas line sizing, regulator requirements, electrical service, water flow, venting needs, elevation requirements, installation location, and local code requirements before ordering.

Installation Notes

This heater must be installed by a qualified pool professional, licensed gas technician, or licensed contractor as required by local code. Proper installation requires correct propane gas supply sizing, gas pressure verification, electrical wiring, bonding, grounding, water flow verification, plumbing layout, combustion air, and venting where required.

Before installation, confirm the site uses propane / LP gas and that the gas supply can support a 250,000 BTU pool and spa heater.

Water chemistry must be maintained within recommended ranges to protect the copper heat exchanger and preserve heater performance. Improper water balance, poor flow, incorrect gas pressure, or improper installation can damage the heater and may void warranty coverage.

Customer-Facing Q&A

Q: What is the Pentair 460772?
A: It is a Pentair MasterTemp ASME 250 propane gas pool and spa heater rated at 250,000 BTU.

Q: What is the SKU?
A: The SKU is 460772.

Q: What is the UPC / GTIN?
A: The UPC / GTIN is 788379788421.

Q: What fuel type does this heater use?
A: This model uses propane gas / LP gas.

Q: Is this a natural gas heater?
A: No. This is the propane model. Natural gas versions use different part numbers.

Q: How many BTUs is this heater?
A: This heater is rated at 250,000 BTU.

Q: What does ASME mean?
A: ASME refers to certified heater construction commonly required for many commercial or code-specific pool heater applications.

Q: Is this Low NOx?
A: Yes. This model is commonly listed as a Low NOx heater.

Q: What heat exchanger does this model use?
A: This model uses a copper heat exchanger.

Q: What header material does it use?
A: This ASME model uses bronze headers.

Q: Does it have digital controls?
A: Yes. It includes a digital control system with indicator lights for easy operation and monitoring.

Q: What voltage does it require?
A: This model is commonly listed for 120/240VAC operation.

Q: Should this heater be professionally installed?
A: Yes. Professional installation is required because this heater involves propane gas, electrical wiring, plumbing, venting, bonding, and safety requirements.