Product Overview

The Pentair 474061 Tube Sheet Coil Assembly is a genuine OEM replacement heat exchanger designed for compatible 400,000 BTU Pentair MasterTemp and Sta-Rite Max-E-Therm pool and spa heaters. This assembly transfers heat from the combustion system into the circulating pool or spa water, making it one of the heater’s most important internal components.

The 474061 is commonly used to replace a heat exchanger that has developed leaks, corrosion, scale buildup, freeze damage, or reduced heat-transfer performance. Replacing the damaged assembly can restore proper heating efficiency and extend the service life of the existing heater without requiring replacement of the complete unit.

This standard copper tube sheet coil assembly is intended for compatible natural-gas and propane heater models manufactured after January 12, 2009. Always verify the heater model, serial number, production date, and parts diagram before ordering.

Key Features

Genuine Pentair OEM replacement assembly

Designed for 400,000 BTU heaters

Standard copper heat exchanger construction

Compatible with select MasterTemp 400 heaters

Compatible with select Max-E-Therm SR400 heaters

Works with natural-gas and propane configurations

Designed for heaters manufactured after January 12, 2009

Restores proper heat transfer and heating performance

Replaces leaking, corroded, scaled, or freeze-damaged coils

Includes primary installation seals and components

Benefits

Restores reliable pool and spa heating

Helps eliminate internal heat exchanger leaks

Maintains proper water flow through the heater

Provides correct OEM fit and alignment

Reduces the need to replace the complete heater

Supports safe and efficient heater operation

Ideal for professional heater repair and refurbishment

Specifications

Warranty & Compatibility

Compatible Heater Models

This assembly is designed for compatible standard models, including:

• Pentair MasterTemp 400 Natural Gas
• Pentair MasterTemp 400 Propane
• Sta-Rite Max-E-Therm SR400NA
• Sta-Rite Max-E-Therm SR400LP

This part is not intended for HD, ASME, or older heater configurations unless specifically confirmed by the manufacturer’s parts diagram.

Common Reasons for Replacement

Replacement may be needed when the heater has:

• Water leaking from the combustion chamber
• Cracked or split copper tubing
• Freeze damage
• Internal corrosion
• Severe scale buildup
• Reduced heating output
• Restricted water flow through the coil
• Visible deterioration of the tube sheet assembly

The cause of the original failure should be corrected before installing the replacement. Improper water chemistry, low flow, excessive sanitizer, freezing, and chemical exposure can damage a new heat exchanger.

Installation Information

Installation requires significant heater disassembly and should be completed by a qualified pool-heater technician. Electrical power and gas must be shut off before service. The heater must be drained, disassembled, resealed, pressure-tested, and inspected for proper combustion before returning it to operation.

Professional installation is strongly recommended due to the gas, electrical, plumbing, and combustion requirements involved.

Confirm Before Ordering

Please verify:

• The required part number is 474061
• The heater is rated at 400,000 BTU
• The heater is a standard MasterTemp 400 or Max-E-Therm SR400
• The heater was manufactured after January 12, 2009
• The heater is not an HD or ASME model
• The original heater serial number and parts diagram match this assembly

Warranty Information

This genuine Pentair replacement assembly is covered by the manufacturer’s limited warranty against qualifying defects in materials and workmanship. Damage caused by freezing, scale, corrosion, improper water chemistry, insufficient flow, or incorrect installation may not be covered.

Customer-Facing Q&A

Q: Does this fit the Pentair MasterTemp 400?
A: Yes, it fits compatible standard 400,000 BTU MasterTemp models manufactured after January 12, 2009.

Q: Does it fit Max-E-Therm SR400 heaters?
A: Yes, it fits compatible SR400 natural-gas and propane models.

Q: Is this a complete heater?
A: No. This listing is for the tube sheet coil and heat exchanger assembly only.

Q: Is professional installation recommended?
A: Yes. This repair involves gas, electrical, plumbing, sealing, and combustion procedures.