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How to Winterize Your Aquavoss Cold PlungeUpdated a day ago

Applies to:

  • Aquavoss AV-1 (Cold Plunge)
  • Aquavoss AV-2 (Cold Side Only)


Overview

If your Aquavoss cold plunge will be exposed to freezing temperatures (32°F / 0°C or below), proper winterization is critical to prevent damage to plumbing, pumps, and the chiller system.

The only Aquavoss-approved winterization method is:

  1. Drain the unit completely
  2. Blow out / vacuum all plumbing lines
  3. Remove the filter and filter housing
  4. Remove the chiller and store it indoors

Any other approach (such as running the pump continuously or attempting to operate through freezing conditions) is done at the owner’s risk.

⚠️ Freeze damage caused by improper winterization is not covered under warranty.


When You Should Winterize

You should winterize if:

  • Temperatures are expected to fall to 32°F (0°C) or below
  • The unit will be unattended during cold weather
  • You cannot verify daily operation and circulation
  • There is any risk of power outages or equipment shutdown

Even a short freeze event can cause severe damage if water remains in plumbing.


Tools & Supplies Needed

  • Wet/dry shop vacuum (with blow and vacuum capability)
  • Towels
  • Basic hand tools (if needed for unions or clamps)
  • Bucket or container for residual water
  • Optional: Propylene glycol RV/spa antifreeze (never automotive antifreeze)


Step-by-Step Winterization Instructions

Step 1 - Turn Off Power

  1. Turn the cold side OFF at the control panel.
  2. Shut off the breaker/GFCI supplying the unit.
  3. Confirm the system cannot power on while empty.


Step 2 - Drain the Cold Plunge

  1. Attach a hose or use a pump if necessary.
  2. Drain the vessel completely.
  3. Remove any remaining water with towels or a shop vac.


Step 3 - Remove Filter and Housing

  1. Remove the filter cartridge.
  2. Remove the filter housing/canister assembly.
  3. Drain all water from the housing.
  4. Dry thoroughly and store indoors.


Step 4 - Remove the Chiller (Critical Step)

  1. Shut any isolation valves if present.
  2. Disconnect inlet and outlet hoses.
  3. Allow hoses to drain completely.
  4. Disconnect power/control connections if required.
  5. Move the chiller indoors to a dry, above-freezing location.

The chiller must not be left outdoors with water inside during freezing conditions.


Step 5 - Blow Out and Vacuum Plumbing Lines

The goal is to remove all water from plumbing and components.

Recommended method:

  1. Set shop vac to BLOW.
  2. Blow air into:
    • Suction openings
    • Return/jet openings
    • Any disconnected hose ends
  3. Switch shop vac to VACUUM.
  4. Vacuum from:
    • Filter well or suction standpipe
    • Jet openings
    • Drain area

Tip: Use a rag to seal around the vacuum hose to increase suction and pull trapped water out.


Step 6 - Dry the Interior

  • Wipe the shell completely dry.
  • Remove any standing water in equipment areas.
  • Leave cabinet open briefly (if safe) to allow moisture to evaporate.


Step 7 - Optional Added Freeze Protection

For extreme climates, you may add propylene glycol (RV/spa antifreeze) into plumbing openings after purging.

  • Never use automotive antifreeze (ethylene glycol).
  • Flush thoroughly before returning to service.


Step 8 - Close and Secure

  • Reinstall cabinet panels if removed.
  • Secure the cover.

Your unit is now winterized.


Spring Startup (Recommissioning)

When temperatures are safely above freezing:

  1. Reinstall the chiller and reconnect hoses.
  2. Reinstall filter housing and filter.
  3. Fill the plunge completely.
  4. Restore power.
  5. Check for leaks and proper circulation before use.

If antifreeze was used, drain and flush before normal operation.


Important Safety and Warranty Notes

  • Operating the cold plunge in freezing weather without winterization is not recommended.
  • Running pumps continuously or attempting to “keep water moving” does not replace proper winterization.
  • Damage caused by freezing water is not covered under warranty.


Frequently Asked Questions

Can I run the cold plunge during winter?

Only if temperatures remain above freezing and the unit is monitored. Persistent freezing conditions require winterization.

Can I leave the chiller outside if I drain it?

No. Residual moisture can freeze and cause damage. The chiller should be stored indoors.

Do I need antifreeze?

Not usually. Proper draining and line purging is typically sufficient. Antifreeze is optional for severe climates.



Need Help?

If you have questions or would like assistance with winterization:

Aquavoss Technical Support
Contact us through your customer portal or support email.

 

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