Sand in pool after backwash/rinse

[wizzardz]

Below are links to pics. I noticed the gauge is currently reading lower than when I replaced it (was about 15)






Let me know if there are other pics that would be helpful. Your feedback has been most helpful and makes sense.

I believe the psi change I mentioned above may have been before (15) and after (12) the backwash/rinse cycles.

From your description, its sounds I need a way to reduce the GPM rate. Any suggestions on how that may be accomplished? I'm guessing since the old gasket was partially blown out, it was reducing the flow by bypassing some to waste or recirc. (or the higher rate helped blow out the gasket)

thanks again