Replacement diaphragm for heavy duty valves works with: Heavy duty 3/4 in. FPT inline sprinkler valve (57280， 57280L， 91415， 94480) heavy duty 1 in. FPT inline sprinkler valve (57281， 57281L， 91420， 94481).
Replacement diaphragm for heavy duty valves works with: Heavy duty 3/4 in. FPT inline sprinkler valve (57280， 57280L， 91415， 94480) heavy duty 1 in. FPT inline sprinkler valve (57281， 57281L， 91420， 94481).
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