Step 4 — Winterize the water return

Once the water level has been lowered, protect the returns to prevent damage from freezing.

• For an above-ground pool, install the yellow winterizing plug on the return, especially in areas with heavy snowfall.
• Use the designated wrench to tighten it securely.

• For an in-ground pool, after blowing out the lines, add pool antifreeze to the pipes, then install the winterizing plug with the designated wrench.

* Add Teflon tape to the plug threads before installation.