Backflow PreventerProtect your pedicure spa plumbing system with the LF7R Dual Check Valve Backflow Preventer Kit. Designed to prevent contaminated water from flowing back into the clean water supply, this complete kit ensures safe, compliant, and hygienic operation in salon environments. Engineered for reliability, the dual check valve system provides an added layer of protection by using two independent check mechanisms to maintain consistent backflow prevention.