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Winterizing a hot tub

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littleboss:
Hi

Building a place in Colorado and will have a hot tub. Looking for an easy way to winterize it. On my RV I pump RV antifreeze through the system. The pump on the RV pulls it through. How would i do this on a hot tub?

Tman122:

--- Quote from: littleboss on May 25, 2020, 09:58:47 am ---Hi

Building a place in Colorado and will have a hot tub. Looking for an easy way to winterize it. On my RV I pump RV antifreeze through the system. The pump on the RV pulls it through. How would i do this on a hot tub?

--- End quote ---

I would recommend you use a shop vac to evacuate water instead of glycol.

littleboss:
How would you go about doing that? attach it to the plumbing lines near the pump?

Tman122:

--- Quote from: littleboss on May 25, 2020, 03:02:23 pm ---How would you go about doing that? attach it to the plumbing lines near the pump?

--- End quote ---

Do a complete drain. Use the shop vac to draw water out of lines through jets and push water out by blowing into the jets. Open the unions by the pump/s.

CanadianSpaTech:
Just know that when you take the water out of a hot tub for extended time the air gets at everything. Seals around jets deteriorate, Metal (heater element) will rust.  If you take the water out and keep the cover on it will get real damp and moist under there with outside temp changes and mold will grow. It will be even worse if you use RV anti freeze. If you have to winterize you have to suck and blow out every line open all the pumps and get ALL the water out from every orifice in the spa. Any water you can't get out will freeze, expand and crack plumbing. Spas that use one way check valves in the main plumbing often get missed as you have to remove the water from both sides of the check valve. Make sure to spray the interior shell with a mold inhibitor spray.

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