My Sundance Optima has a chronic leak in the pvc pipe located below the "jets 1" mix valve control. Repaired once under warranty then two more times at my expense. Removed the mix control valve each time and inserted a repair sleeve each time to repair the leak. Repairs work for a few months then spring a leak and I am back to square one. Each time my spa cycles the leak drains a few inches out out of my spa.

Appreciate any ideas for a more permanent repair. Thanks.