I have two plugs from the last time my pool was closed. One I’m sure goes to the return lines to seal them. The other one was for a blow out pipe. They both have the same number but the difference is that one has a “2” and the other has a “4”. I’m sure the “2” is a standard 1.5 inch plug and was used for the returns. I’m not sure what the “4” is an I can’t find one on line. They don’t show a numerical code. Only the 1.5 inch plugs (the “2’s”) come up. But even those don’t show/mention the “2”. I’m trying to buy an extra “4”.



