Secure Fit: The air jet valve cap provides a secure fit that helps prevent water leaks, maintaining the pool’s integrity and efficiency. Durable Material: Pool shut off valve cap is made from High-Quality materials for long-lasting performance. Pool Inlet Valve Cap Compatible with intex parts number : 12373 12355 Very easy to replace. Worked and stopped the leaking from jet valve. Having the aeration helps to keep the PH in balance. Compatible with models :26165EH, 26167EH, 26175EH, 26183MW, 26191CA, 26191EH, 26193EH, 26301T, 26303EH, 26309EH, 26321EH, 26323CA, 26323EH, 26331CA, 26331EH, 26335EH, 26337EH, 26341W, 26343EH, 26345W, 26351EH, 26351W, 26361CA, 26361EH, 26361W, 26365EH, 26371CA, 26371EH, 26375EH, 26381EH, 26719MW, 26719W, 26733EH, 26735EH etc. Very easy to replace. Worked and stopped the leaking from jet valve. Having the aeration certainly helps to keep the PH in balance. My PH had actually dropped while I had the cap on the jet valve waiting for the replacement. Had to use Baking Soda to raise it back up.