Pentair Backup Valve, for LL10, L10, Replacement | E10 Filbur Two precise fit options —

Two precise fit options — select the configuration that matches your rectangular inground pool: 20 ft × 40 ft or 25 ft × 45 ft

Pentair supports legacy American Products equipment with OEM replacement parts

It supports proper exhaust flow and combustion efficiency

W1-1/2 S — standard sizing for compatibility with CMP and compatible jet assemblies

this programmable controller allows you to set precise run times of 30

Pentair Backup Valve, for LL10, L10, Replacement | E10 Filbur Two precise fit options —What This Part Is Used For Pentair E10 Backup Valve Replacement LL10, L10 is a replacement backup valve designed for compatible Legend cleaner models. It helps regulate water flow and directional movement during cleaning cycles. Why This Part Matters A properly functioning backup valve prevents the cleaner from getting stuck in corners or steps. When the internal mechanism fails, the cleaner may lose mobility. Replacing it restores consistent coverage