Response to Hey There, I have an aging Jandy filter tank which developed cracks which leaked. Since they discontinued the DEL48 tank bottom, I purchased the DEV48 part R0466500 after consulting with pool professional. After trying to install, I found that the backwash valve that was on the original plumbing does not connect to the new DEV48 tank unions. Alignment is good but the new tank threads are larger. Is this valve necessary or are there some adapters I can buy to connect it back up?

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