Product Overview

The Pentair Tube Sheet Coil Assembly Kit (250) is an OEM replacement heat exchanger coil assembly designed for compatible 250K BTU Pentair MasterTemp and Sta-Rite Max-E-Therm pool and spa heaters.

This internal heater component helps transfer heat from the burner system into the pool or spa water. It is commonly replaced when the original coil assembly is leaking, scaled, corroded, cracked, or no longer allowing the heater to operate efficiently.

Ideal For

Pool service professionals and heater repair technicians servicing compatible 250K BTU Pentair MasterTemp or Sta-Rite Max-E-Therm heaters. This part is ideal when the heater cabinet and other major components are still usable, but the internal tube sheet coil assembly needs replacement.

Key Features

OEM Pentair Replacement Part

Designed as a genuine replacement tube sheet coil assembly kit for compatible Pentair and Sta-Rite heater applications.

For 250K BTU Heater Models

Built for select 250,000 BTU MasterTemp and Max-E-Therm pool and spa heaters.

Heat Transfer Component

The tube sheet coil assembly helps transfer heat from the heater’s combustion system into the circulating pool or spa water.

Repair Solution for Leaking or Damaged Coils

Useful when the existing coil assembly is leaking, cracked, heavily scaled, corroded, or causing heater performance issues.

Compatible with MasterTemp and Max-E-Therm

Commonly used on compatible Pentair MasterTemp 250 and Sta-Rite Max-E-Therm 250 heater models.

Professional Service Part

This is an internal heater repair component and should be installed by a qualified pool heater technician.

Benefits

The Pentair Tube Sheet Coil Assembly Kit helps restore heating performance on compatible 250K BTU pool and spa heaters. A failed or damaged coil assembly can cause water leaks, poor heat transfer, heater shutdowns, corrosion issues, or unsafe operation.

Replacing the coil assembly with the correct OEM part can help extend the life of the existing heater and restore proper heating operation without replacing the entire heater. Because this part is located inside the heater and interacts with water, combustion, and gas-fired heating components, professional installation is strongly recommended.

Specifications

Customer-Facing Q&A

Q: What does the tube sheet coil assembly do?
A: The tube sheet coil assembly helps transfer heat from the heater’s combustion system into the pool or spa water.

Q: What heater size is this for?
A: This kit is for select 250K BTU heater models.

Q: Does this fit all MasterTemp heaters?
A: No. This part is specifically associated with compatible 250K BTU models. Always confirm the heater model, serial number, and parts diagram before ordering.

Q: Is this compatible with Sta-Rite Max-E-Therm heaters?
A: It is commonly used with compatible Sta-Rite Max-E-Therm 250K BTU heater models, but exact compatibility should be verified before purchase.

Q: When should this coil assembly be replaced?
A: Replace it if the existing coil assembly is leaking, cracked, heavily scaled, corroded, or diagnosed as failed by a qualified heater technician.

Q: Can poor water chemistry damage this part?
A: Yes. Improper pH, alkalinity, calcium hardness, or sanitizer levels can shorten the life of heater components and cause corrosion or scaling.

Q: Can I install this myself?
A: Professional installation is strongly recommended. This repair involves internal heater disassembly, plumbing, gas-fired heating components, seals, water pressure, and safety checks.