18x33 abg pool what size sand filter

[badutahboy]

I am guessing you know enough about your equipment to know that you have to shut the pump off in between each time you switch from FILTER to BACKWASH or RINSE, etc. Also, no air in the vacuum hose when you start to vacuum? Are you flushing the air out of that hose before you start so the pump doesn't cavitate?

Some very good points that most people, myself included would forget... It's been 13 years since I had a pool and did any maintenance, and I guarantee I'd have forgotten these points. Thanks for this.. It likely prevented me from posting a similar thread in 3 weeks.

[sisie5]

my sand is a hayward SP0714T SERIES VARI-FLO XL VALVE,Yes I can backwash rince with no ploblem.Here is what I did,I unhooked my new filter,and hooked up my old 100lb filter,and it does the sand thing.didnt do anything different,and last yr this work great,this is why I'm so puzzled.and frustrated.And now I have another problem,I have a leak in my liner.so Im trying to find another liner.I will keep you all posted
thank for all your help

[tenax]

are you saying that it works fine when you hook the 100 pounder filter back up or not? one suggestion if you didn't do when adding sand to a filter is to put some water in first..that way the sand floats down more gently as you add it. less risk of damaging the laterals or knocking them out of position.

[sisie5]

yes Im saying the old filter stops vacuuming to after about 3 mins,yes I did add some water first.Im ready to just give up on this pool thing