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Fix a hot tub that leaks

We'll help you locate the leak, then isolate the cause—loose fittings, pump seal, or plumbing—or tell you when to call a pro.

Troubleshooting · Home appliances
15–45 min
What you'll need
  • Wrench or channel locks (for fittings)
  • Towel (to dry and observe leak)
  • Replacement jet face or seal (if needed)
Diagnostic graph validation issues: Terminal node n_jet must have null branches
Step 1 of 6

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Choose the option that matches what you see. You can jump straight to that section.

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Steps

Goal: Locate the leak, then tighten or replace the faulty part—or call a pro when needed.

  • Dry the area around the leak and run the pump. Watch where water appears—at a jet, under the pump, at a plumbing union, or under the tub.
  • Good: You identify the exact source. Proceed to the matching section.
  • Bad: You cannot pinpoint it—use the leak detection test in Locate the leak or call a pro.

Locate the leak

Goal: Find the exact source of the leak.

  • If the leak only appears when the pump runs, it is likely a pressure-side leak (pump, jets, or plumbing after the pump). If it leaks when the pump is off, it may be a suction-side leak.
  • To narrow it down: drain the tub below the jets and fill slowly. Mark the water level and wait. If the level drops, the leak is below the water line. Add water back and observe where it stops.
  • Good: You know the general area. Proceed to Tighten jets and fittings.
  • Bad: Leak is under the shell—call a pro.

Tighten jets and fittings

Goal: Fix leaks at jets and fittings by tightening or replacing.

  • With the pump off, grip each jet face and turn clockwise to tighten. Do not overtighten—hand-tight plus a quarter turn is usually enough.
  • If the jet face is tight but water still leaks, access the equipment compartment and check the union or connection behind the jet. Tighten with a wrench if loose.
  • Good: The leak stops. Confirm with the pump running.
  • Bad: Fitting is cracked or you cannot access it—call a pro.

Pump seal and plumbing

Goal: Check the pump seal and plumbing for leaks.

  • A wet spot under the pump (where the shaft enters the housing) usually means a failed pump seal. Replacing it requires draining and disconnecting the pump—call a pro if you are not comfortable.
  • Inspect all unions and connections in the equipment compartment. Tighten loose connections. Replace cracked hoses or pipes—call a pro if you cannot access them.
  • Good: You fix a loose connection. Confirm no drip.
  • Bad: Pump seal failed or plumbing is cracked—call a pro.

When to get help

Call a pro if:

  • The leak is under the shell or from the shell itself.
  • Plumbing is cracked and you cannot access or replace it.
  • Pump seal replacement is needed and you are not comfortable.
  • The leak is large or persistent.

Pump seal replacement requires draining and plumbing. Never work on electrical components with wet hands or while standing in water.

Verification

  • No water drips from jets, fittings, or the pump when the pump runs.
  • No wet spot under the pump.
  • No water under the tub.
  • Water level stays stable over 24 hours.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Locate the leak Dry the area and run the pump; note where water appears.
  2. Tighten jets and fittings Tighten loose jet faces and plumbing connections.
  3. Pump seal Check the pump seal; replace if failed—call a pro if not comfortable.
  4. Plumbing Inspect unions and connections; replace cracked pipes—call a pro if needed.
  5. Call a pro Leak under shell, cracked plumbing, or pump seal replacement.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • Where the leak appears (jet, pump, plumbing, under tub)
  • Whether the leak occurs with pump on or off
  • Steps already tried

Where does the leak appear?

Dry the area and run the pump. Watch where water appears.

Dry the area around the leak and run the pump. Jet or fitting: water at a jet or connection—tighten jet face or union. Under pump: wet spot under the pump—likely pump seal. Under tub: water under the shell—call a pro.

Jet or fitting Under pump or plumbing

You can change your answer later.

Did tightening the jet face stop the leak?

Loose jet faces are a common cause. Turn clockwise to tighten.

With the pump off, grip each jet face and turn clockwise to tighten. Do not overtighten. If the jet face is cracked, replace it. Test with the pump on.
Question

Did tightening the jet face stop the leak?

Done

Is the fitting behind the jet loose?

The union or connection behind the shell may be loose.

Access the equipment compartment. Locate the plumbing behind the leaking jet. Tighten the union with a wrench. If cracked, replace—call a pro if you cannot access it.
Question

Is the fitting behind the jet loose?

Continue

You can change your answer later.

Is the leak under the pump?

A wet spot under the pump usually means a failed pump seal.

Check for water at the pump seal (where the shaft enters the pump). Replacing the seal requires draining and disconnecting the pump—call a pro if you are not comfortable.

Yes No

You can change your answer later.

Is there a loose or cracked plumbing connection?

Unions and connections can leak when loose or cracked.

Inspect unions and connections in the equipment compartment. Tighten loose connections. If a hose or pipe is cracked, replace it—call a pro if you cannot access it.
Question

Is there a loose or cracked plumbing connection?

Continue

You can change your answer later.

Call a technician

Call a pro if the leak is under the shell, from cracked plumbing, if pump seal replacement is needed, or for large or persistent leaks. Pump seal replacement requires draining and plumbing.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a hot tub leak?
Common causes: loose jet faces or fittings, failed pump seal, cracked or loose plumbing unions, or damage to the shell or plumbing. Tighten fittings first. A wet spot under the pump usually indicates a pump seal failure. Leaks under the shell or from cracked pipes require a pro.
Can I fix a hot tub leak myself?
Yes, for loose fittings and jet faces. Pump seal replacement requires draining and plumbing work—call a pro if you are not comfortable. Never work on electrical components with wet hands or while standing in water. Shell or plumbing cracks need a professional.
When should I call a technician for a hot tub leak?
Call a pro if the leak is under the shell, from cracked plumbing, or if you are not comfortable with pump seal replacement or plumbing. Pump seal replacement requires draining. Large or persistent leaks may indicate structural damage.

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