Sundance® / Jacuzzi® Diverter Cap O-Ring – part #6540-865

Q: What does 6540-865 fit?

A: It fits the diverter valve cap (body) on many Sundance® / Jacuzzi® spa diverters.

Q: What are its dimensions?

A: Approximately 63 mm ID, 69 mm OD, 2.5 mm thickness.

Q: What happens if you overtighten with this O-Ring?

A: The wall fitting or cap could crack; it’s important to tighten only to spec. spaandpoolstore.com+1

Q: Is this O-Ring specific to any spa model?

A: It is used across many models and is catalogued for divergence “for all models.

Turn off spa power and relieve pressure in the plumbing system.

Remove the diverter cap / lid carefully.

Take out the old 6540-865 O-Ring from its groove.

Clean the groove and mating surfaces.

Lightly lubricate the new O-Ring with silicone lubricant safe for spa use.

Seat the new O-Ring evenly in its groove without twisting.

Reinstall the diverter cap without overtightening.

Test for leaks under pressure, and back off if the wall fitting stresses.