Thresher Robotic Automatic Pool Cleaner This item is not returnable This Top Track/Stabilizer fits 21'

This Top Track/Stabilizer fits 21' Round & Curved Side of 21'X43' Oval Bristol

earlier in the spring and later in the fall

Copper & Aluminum increases rust protection by 72%

Mineral Springs or SplashClear chlorination system

filters manufactured after 2015

Thresher Robotic Automatic Pool Cleaner This item is not returnable This Top Track/Stabilizer fits 21'The 8Streme Thresher Pool Cleaner is a high quality robotic cleaner for above ground swimming pools up to 27' Round and 21'x43' Oval. This robotic pool cleaner features Focus Flow and Extend Clean Technology which accelerates water flow and extends the cleaners suction zone for faster cleaning. The integrated patented swivel cable technology reduces cord tangling and includes a built in diagnostic system to assist with diagnostic malfunctions. It also