Pentair Max-E-Therm ASME Propane Pool and Spa Heater 400K BTU | 460764

Product Overview

The Pentair Max-E-Therm 460764 is a high-performance 400,000 BTU propane pool and spa heater designed for commercial, semi-commercial, and residential installations requiring an ASME-certified heat exchanger.

Its compact, induced-draft design delivers fast heating while requiring less equipment-pad space than many traditional commercial heaters. The unit features direct hot-surface ignition, digital temperature controls, brass water headers, and an ASME HLW-stamped heat exchanger.

This model operates on propane gas only and requires a 120/240 VAC electrical connection. It is suitable for indoor or outdoor installation when installed according to Pentair requirements and all applicable codes.

Key Features

• 400,000 BTU heating capacity
• Factory configured for propane gas
• ASME-certified heat exchanger
• ASME brass water headers
• Compact equipment-pad footprint
• Digital temperature controls
• Hot-surface electronic ignition
• No standing pilot light
• Induced-draft combustion system
• Indoor or outdoor installation capability
• 120/240 VAC electrical operation
• Factory-installed pressure-relief protection
• Compatible with select pool automation systems

Benefits

• Quickly heats large pools and spas
• Meets requirements for many commercial applications
• Compact design preserves equipment-pad space
• Electronic ignition improves convenience and efficiency
• Digital controls simplify temperature adjustment
• Brass headers provide durability in demanding applications
• Dual-voltage capability supports different installation requirements
• Automation compatibility allows centralized heater control

Specifications

Pentair’s ASME submittal information specifies a minimum thermal efficiency of 82%, brass headers, an ASME HLW-stamped heat exchanger rated to 100 PSIG maximum allowable working pressure, and a 50 PSI pressure-relief valve.

Installation Information

Installation must be completed by qualified pool, gas, and electrical professionals. The installer must confirm propane supply pressure, regulator capacity, gas-line sizing, electrical voltage, plumbing flow, venting requirements, combustion-air supply, clearances, grounding, bonding, and local commercial codes.

ASME models require the plumbing materials and connections specified by Pentair. The installation manual identifies Schedule 80 CPVC connections for ASME configurations.

Do not attempt to convert this heater from propane to natural gas in the field unless a conversion is specifically approved by Pentair and applicable regulations.

Confirm Before Ordering

• Confirm propane gas is available at the installation.
• Verify that a 400,000 BTU heater is properly sized.
• Confirm an ASME-certified heater is required.
• Verify gas-line and regulator capacity.
• Confirm the available electrical supply.
• Check indoor or outdoor venting requirements.
• Verify plumbing-flow requirements.
• Confirm commercial code and inspection requirements.
• Compare part number 460764 with the required model.
• Do not substitute this model for a natural-gas heater.

Warranty Information

This heater is covered according to Pentair’s applicable limited-warranty terms. Warranty eligibility may depend on authorized-dealer purchase, professional installation, product registration, proper gas and electrical connections, correct water chemistry, and compliance with Pentair installation instructions.

Damage caused by improper gas pressure, restricted water flow, incorrect voltage, freezing, corrosive water chemistry, improper venting, or unauthorized modification may not be covered.

Customer Q&A

Is this heater propane or natural gas?
It is factory configured for propane gas.

Is this an ASME-certified heater?
Yes. It includes an ASME-certified heat exchanger and brass headers.

What is the heating capacity?
The heater is rated at 400,000 BTU.

Can it be installed indoors?
Yes, when properly vented and installed according to Pentair and local requirements.

Does it require electricity?
Yes. It requires a 120/240 VAC electrical supply.

Is professional installation required?
Yes. Licensed pool, gas, and electrical professionals should complete the installation.