2-1/2" O-Ring Gasket – Heater Union Seal for Pool & Spa Systems

Ensure a watertight connection on your pool or spa heater with this 2-1/2" O-Ring Gasket, specifically designed for use in heater union fittings. This high-quality replacement seal helps prevent leaks and maintain system pressure at the critical junction where plumbing meets the heater.

Ideal for both residential and commercial applications, the gasket is made from durable, chemical-resistant rubber that stands up to high temperatures and chlorine exposure. Whether you're performing seasonal maintenance or replacing worn parts, this union gasket is a must-have for long-term system integrity. Available locally at Splash Pool & Spa, proudly serving Peterborough for nearly 20 years.

Features:
✔️ 2-1/2” Union O-Ring – Designed for use with standard heater union fittings
✔️ Leak-Proof Seal – Prevents water loss and protects plumbing connections
✔️ Chlorine & Heat Resistant – Built to endure pool and spa environments
✔️ Easy to Install – Ideal for heater service, repairs, and seasonal prep
✔️ Locally Stocked – Available at Splash Pool & Spa, Peterborough’s pool and spa parts expert

Specifications:
- Product Name: 2-1/2" O-Ring Gasket – Heater Union
- Size: 2.5” diameter (standard union fit)
- Application: Heater union seal for pool and spa plumbing
- Material: Chlorine-resistant rubber

Why Shop at Splash Pool & Spa?
For nearly 20 years, Peterborough pool and spa owners have trusted Splash Pool & Spa for quality parts, personalized advice, and fast, local availability. Whether you're fixing a leak or servicing your heater, we’ve got what you need to keep your system sealed and running smoothly.