O-Ring Seal 2-1/2" for Heaters

The 2-1/2'' O-Ring (711-6020) is a replacement part for spa and pool heater unions. It seals the connection and prevents leaks that hurt heating performance. A quick, affordable DIY repair.

Features

• Outer diameter: 3-3/8''
• Inner diameter: 2-1/2''
• Thickness: 1/2''
• Elastomer resistant to temperature changes
• Part no.: 711-6020

Compatibility

Made for standard heater unions. Match the inner (2-1/2'') and outer (3-3/8'') diameters against your original O-ring before ordering.

When to replace it

Replace the O-ring if it's hardened, crushed, or cracked, or as soon as a leak appears at the heater union. Fit a fresh O-ring whenever you open the union.

Why buy from us

Destination Piscine Aide in Saint-Bruno-de-Montarville helps you find the right O-ring and keeps common union seals in stock.

FAQ

What are the diameters? 2-1/2'' inner and 3-3/8'' outer.

Does it suit both spa and pool? Yes, it fits standard spa and pool heater unions.