Product Overview

The Pentair 476106 Heat Exchanger Union Adapter Kit is a genuine OEM replacement kit designed for select Pentair ETi high-efficiency pool heaters. This kit provides the union adapter connection used at the heater’s heat exchanger, helping create a secure, serviceable plumbing connection.

Union adapters are important because they allow the heater to be connected, disconnected, serviced, or replaced without cutting plumbing lines. This kit is commonly used during heater repair, heat exchanger service, or replacement of damaged/missing union adapter components.

Ideal For

Pool service professionals repairing or servicing compatible Pentair ETi heaters where the heat exchanger union adapter connection needs to be replaced.

Key Features

Genuine Pentair OEM replacement kit

Part number 476106

Heat exchanger union adapter kit

Designed for compatible Pentair ETi heaters

Helps connect plumbing to the heater heat exchanger

Allows easier heater service and disconnection

Helps create a secure, leak-resistant connection

Durable materials for pool heater environments

Used for heater repair, service, or replacement installations

Professional installation recommended

Benefits

The Pentair 476106 Heat Exchanger Union Adapter Kit helps restore a proper plumbing connection at the heat exchanger on compatible Pentair ETi heaters. A damaged, worn, or missing union adapter can cause leaks, poor fitment, or difficulty servicing the heater.

Using the correct OEM Pentair kit helps ensure proper fit, reliable sealing, and easier future maintenance.

Specifications

Warranty & Compatibility

Confirm Before Ordering

Please confirm your heater model number, serial number, heater series, and parts diagram before ordering. This part is used on select Pentair ETi 400 and ETi 250 heater models. Compatibility should be verified before purchase.

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

Customer-Facing Q&A

Q: What is Pentair 476106 used for?
A: Pentair 476106 is a heat exchanger union adapter kit used to connect the heater plumbing to the heat exchanger on compatible Pentair ETi heaters.

Q: Which heaters does this fit?
A: This kit is listed for use with Pentair ETi 400 and ETi 250 heater models.

Q: Is this a genuine Pentair part?
A: Yes. This is a genuine Pentair replacement part.

Q: Does this help with leaks?
A: If the existing union adapter connection is cracked, damaged, missing, or not sealing properly, replacing it with the correct OEM kit may help restore a watertight connection.

Q: Is this a DIY repair?
A: Heater repairs should be completed by a qualified pool heater technician, especially when working around gas, electrical, or major heater components.