I have an SD 80 sand filter. The valve cracked on it and it is spraying water right where the pipe goes in from the pump. The part number says 272526 but below it has some more numbers that include 262506. When I search the internet I seem to be able to find the 262506 but not the 272526. Does anybody know the difference (or interchange possibility)? Has anybody tried to epoxy one of these valves?