How to fix a hot tub leak

Steps

Goal: Locate the leak and fix loose fittings or worn O-rings.

• Shut off power. See Shut off power.
• Locate the leak at the pump union, jets, or fittings. See Locate the leak.
• Tighten or replace O-rings. See Pump union and Replace O-rings.
• Call a technician for shell or plumbing leaks. See When to get help.

Shut off power

Goal: Work safely with no electrical hazard.

• Turn off the breaker that supplies the hot tub. Confirm the pump and jets are off.
• Good: No lights or pump operation. Proceed to Locate the leak.
• Bad: Unsure which breaker—turn off the main if needed; never work with power on.

Locate the leak

Goal: Find where the water is escaping.

• Dry the equipment area. Run the pump briefly. Watch for water at the pump union, jet fittings, drain plugs, or valves.
• Good: You identify the leak location. Proceed to Pump union or Replace O-rings.
• Bad: Cannot locate or leak is from shell—call a technician. See When to get help.

Pump union

Goal: Stop leaks at the pump connection.

• Hand-tighten the pump union firmly. If it still leaks, replace the O-ring with an exact match. Lubricate with silicone grease.
• Good: No drips when the pump runs. Proceed to Verification.
• Bad: Still leaks—check for crack in union; replace or call a technician.

Replace O-rings

Goal: Fix leaks caused by worn O-rings.

• Remove the fitting, replace the O-ring with an exact match, lubricate, and reassemble. Hand-tighten.
• Good: Leak stops. Proceed to Verification.
• Bad: Fitting is cracked or will not seal—replace the part or call a technician.

When to get help

Call a hot tub technician if:

• The leak is from a crack in the shell.
• You cannot locate the leak.
• Fittings will not seal after tightening.
• Water is leaking near electrical components.

Do not run the pump if water is near electrical components.

Verification

• No drips at the pump union, jets, or fittings when the pump runs.
• All connections are hand-tight.
• Power is restored and the hot tub operates normally.