I have an old ns 24 de filter I am looking for the whole backwash valve assembly
Hi Gerald, if you have 1.5" plumbing going into your valve you need this valve here Praher Side Mount Multiport Valve, 1-1/2", with PacFabPentair DE Plumbing - SM1-PP2 - INYOPools.com and if it is 2" you need this valve here CMP Multiport Valve, 2" Plumbing, Fits Pentair/PacFab - SM2-PP2 - INYOPools.com