Hot Tub Flush

What is hot tub flush and when should you use it?

Hot tub flush is a pipework cleaning treatment used before you drain and refill your spa. It is added to existing water and circulated through the system so it can loosen hidden build-up inside the plumbing, jets and other areas you cannot reach by hand.

Using a hot tub flush is most helpful when water quality has been difficult to manage, when the spa has been left unused for a while, or as part of a periodic deep clean before fresh water goes in. It is a useful preparation step before balancing sanitiser, pH and other chemicals in newly refilled water.

• Use hot tub flush before draining the spa, not after refilling
• Run it through the full system so the cleaner reaches pipework and jets
• Keep filters in place unless the product label tells you otherwise
• Be ready to wipe away any loosened residue around the waterline after circulation
• Drain, rinse and refill once the flush treatment is complete

How to use hot tub flush before a drain and refill

For best results, start with the spa full of water and follow the instructions on the product label you are using. The exact dose and circulation time can vary, so always check the pack before treatment.

• Remove the cover and make sure the water level is correct for normal operation
• Add the hot tub flush treatment to the existing water as directed on the label
• Run pumps and jets for the stated time so the treatment can move through the pipework
• Open air controls and diverter valves during circulation if fitted, so all lines are treated
• Watch for loosened residue or foam and wipe the shell waterline as needed
• Drain the spa fully once circulation is finished
• Rinse the shell with clean water and empty any remaining dirty water from the footwell
• Clean or replace filters if needed before refilling
• Refill with fresh water, then balance sanitiser and pH before use

If your hot tub has not been cleaned for some time, you may notice more debris than usual during the flush. That is a sign to take your time with rinsing and filter care before the refill. Once fresh water is in, regular sanitising and filter cleaning will help keep the system cleaner between deep cleans.