Winterizing Your Fog System

Winterizing your mist system.

Now that we are ending the summer season and heading into fall, temperatures are dropping and the use of a misting system as an outdoor cooling system is drawing to a close until next summer. To help maintain the integrity of the system and to prevent unnecessary damage, it is a good idea to winterize the system and the misting pump before temperatures drop below freezing.

Winterizing a misting system is essentially about removing any excess water and any restrictions that may cause freezing water to damage the various components of the pump and tubing. To accomplish this, the following steps should be taken:

1. Turn off the water supply to the mist pump
2. Remove the inlet and outlet tubing from the mist pump
3. Remove the thermal relief valve from the mist pump plumbing
4. Disconnect the bypass hose from the bottom barb fitting on the mist pumps inlet plumbing
5. Turn on the mist pump. If a low water safety switch is not included on the pump build, the motor will run and will sufficiently empty the bare pump of any excess water within a few seconds. If the pump has a low water safety switch. the motor will not run because the water supply has been turned off. The inlet solenoid valve, however, will be open and will allow the bare pump to be purged of any excess water by forcing compressed air into the pumps inlet and outlet ports until no water exists the pump. This should only take a few seconds. If no compressed air is available, rotate the pulleys on a pulley drive pump or rotate the fan on the rear of the motor on a direct drive pump. Either of these steps will allow excess water to be removed from the bare pump.
6. Turn the mist pump off.
7. Remove the mist nozzles and drain valve(s) from the mist line.
8. Using compressed air, blow out the mist lines until no water exists any open ports. Store the nozzles and drain valve(s) in a dry location until the next season. Soaking the nozzles in heated nozzle cleaner before reinstalling will usually provide improved performance from the misting nozzles.
9. Disconnect the water supply from the filter canister and completely empty the canister. Use compressed air and blow out the feed line between the filter and the mist pump.

This process is a little time consuming but will ensure that no damage is done to the misting pump or the mist tubing during the winter months. At the start of the next summer season, simply connect all the tubing, insert the nozzles, and start enjoying the cooling effects of your misting system for another summer season.