Blow Out the Spa Pipes
If you plan on draining your spa or hot tub for the winter, be sure to use a wet / dry vac to suck out any residual water in the plumbing lines and equipment.
Water will expand about 9 times it size when it freezes and will easily crack plumbing fittings, manifolds, and spa pump wet-ends.
To remove water from spa or hot tub pipes, place the vacuum nozzle over the jets, suction fittings, filter plumbing, and equipment to quickly remove the access water and prevent a huge repair when Spring comes around. You can make special hose attachments by using various fittings, and duct tape, to make the best seal against skimmers, spa jets and pumps.
You can also use the wet dry vac as a blower, to blow out the spa pipes. Connect to your skimmer pipe to blow air through the spa pack. Turn on your spa blower while you are blowing out the hot tub pipes. Move the vac or blower, around to different parts of the spa, to try to get air into every possible area.
This is also important to prevent standing water from growing bacteria inside of the pipes. Keep blowing air through all of the spa jets, until all of the moisture has been blown out of the pipes and equipment.
For this reason, it is also recommended to use a Spa Purge product before draining the spa, to clear the pipes and equipment of biofilm bacteria. We have two excellent hot tub pipe cleaners – Rendezvous Spa Rinse or Leisure Time Jet Clean.
To complete your hot tub winterization, remove any drain plugs on the pump and filter and open the drain valve all the way. Get the last little bit of water out with a sponge and bucket.
Shut off the power to the spa, so the pumps don’t accidentally turn on while the hot tub is winterized.