Pentair Backup Valve, for LL10, L10, Replacement | E10 Filbur Add the product to the

Add the product to the spa water as part of routine maintenance to help minimize foam and maintain water clarity

Pentair supports legacy American Products equipment with OEM replacement parts

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

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

Pentair Backup Valve, for LL10, L10, Replacement | E10 Filbur Add the product to theWhat 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