The filter our pool is a Sta Rite sand filter, model number is w-9463005-1, and the pressure gauge is stuck on 25. I'm guessing this filter is really old since I can't find any information on it. Are gauges generic fit and can I just unscrew this one and replace it with a new one?
Also, given it is likely very old, I've read about replacing sand. When the pool is balanced, it keeps it really clean but I notice that if I vacuum to the filter, then backwash, rinse and return to filter, the pool goes very cloudy. I backwash until the water though the glass sight bottle is clear then rinse for 10-20 seconds, then return to filter, but it will guarantee cloud the pool every time. Is any of this an indication that sand needs replacing, or should I be doing something else?