Spa antifreeze

To add antifreeze to a spa during winterization, you first drain the spa completely and, if possible, blow out the remaining water from the plumbing lines. Then, pour a spa-safe, non-toxic antifreeze directly into the pipes, jets, skimmer, and drain to protect the entire system from freezing. A small amount can also be added to the bottom of the shell to protect against leftover water pockets. It’s important to use only antifreeze formulated for spas and pools—never automotive antifreeze. This treatment helps protect the spa’s plumbing and components throughout the winter season.

1. Turn off the power. Empty the tank completely.
   
2. Purge the pipes: blow through the jets/suctions (water vacuum/blower).
   
3. Pour antifreeze into the jets, suctions, drain and valves (see label quantities).
   
4. Install plugs if provided, protect the equipment (cover in good condition, cover).
   
5. Close the cover. The spa is ready for winter.

As a rule of thumb: ~4 L per 1,000 L of nominal spa water.

Spa 1,000 L → ~4 L of antifreeze

Spa 2,000 L → ~8 L of antifreeze

Purpose: To protect the bottom of the pipes and siphon traps, not to fill the entire system. The exact amount may vary depending on the plumbing; always follow the product label (RV antifreeze/propylene glycol, non-toxic). Never use automotive antifreeze.

To remove the antifreeze, simply fill the spa completely with water, run the jets for a few minutes, and then drain the spa. This step eliminates the antifreeze from the tub and pipes. Afterward, you can fill the spa normally for use.