When winterizing your in-ground pool partially draining the water allows you to disconnect the filter from the pool without the water spilling from the filter connections. The water must also be partially drained to protect components such as the skimmer and return jet from freezing and expanding in winter's frozen temperatures. Once you've drained the water, place an airtight rubber plug in the return jet, and attach a skimmer plate inside the pool on the skimmer opening. www.PoolsTubsLiners.com/
When winterizing your in-ground pool partially draining the water allows you to disconnect the filter from the pool without the water spilling from the filter connections. The water must also be partially drained to protect components such as the skimmer and return jet from freezing and expanding in winter's frozen temperatures. Once you've drained the water, place an airtight rubber plug in the return jet, and attach a skimmer plate inside the pool on the skimmer opening. 
