The Aqua Products jet valve spring is designed for compatible Pool Rover Jr cleaner applications where proper jet-valve tension is needed. A spring like this is useful because it helps the valve return and respond the way it was intended, supporting more consistent internal operation and cleaner overall performance.This replacement is especially useful when the original spring is stretched, weakened, corroded, or broken. Restoring the correct spring tension can make a meaningful difference in how reliably the cleaner’s internal valve action behaves.The A8731CPK is a practical service part for compatible Aqua Products Pool Rover Jr cleaners that need renewed jet-valve spring performance and more dependable operation. Aqua Products jet valve spring Designed for compatible Pool Rover Jr cleaner applications Helps restore proper valve response and tension Useful when the original spring is weak or broken Supports cleaner, more dependable internal cleaner action