Pool Winterization Calculator

How It Works

Proper winterization protects your pool from freeze damage, which can crack pipes, destroy pump housings, and damage pool surfaces. The basic steps are: balance chemistry one week before closing, shock the pool heavily, add winter algaecide, lower the water level, blow out the plumbing lines with a shop vac or air compressor, plug the return lines, add antifreeze to skimmer and drain lines (in freezing climates), remove and store ladders and accessories, and install the winter cover. Do not drain the pool completely — the water pressure helps support the pool walls and prevents the liner or shell from floating up due to groundwater pressure. A mesh safety cover is the best investment: it keeps debris out, supports child safety, and lets rainwater filter through.