Waterway Crystal Water Main Tank Body O-Ring (805-0000) pleatco and this Balboa VS511Z Spa

and this Balboa VS511Z Spa Control System is designed for compatible 4

Control system for compatible Balboa VS523DZ spa applications

This part has practical value because the PCB-mount format and specific voltage and amp rating help preserve intended board compatibility in supported applications

Matching the correct 9 inch by 9 inch square configuration helps preserve intended fit and restore dependable drain coverage

Waterway Crystal Water Main Tank Body O-Ring (805-0000) pleatco and this Balboa VS511Z SpaThe Waterway 805 0000 main tank body O ring is designed for compatible Crystal Water system applications where sealing around the main tank body is critical. A large tank O ring like this plays an essential role in helping the assembly maintain proper sealing and dependable reassembly after service. Over time, O rings can flatten, crack, or lose elasticity, which can lead to leaks or a less secure fit at the tank body connection. Replacing the seal