I developed a small leak (one drop every 20-25 seconds) in the joint coming out of the Pentair Multiport Highflow valve return to the check valve. because the check valve is glued to the highflow return without any room, the ideal repair of cutting/replacing joint will cost me a new highflow valve ($129.00) plus a new check valve ($50) plus possible other unions, etc.
Is there a product that I can use to patc from the inside of the check valve? I can access the inside of the joint by removing the checkvalve cover. Thanks.