just want to say this is my first post. i need help with my intex 2650 sand filter. this is my second season with this filter pump along with the intex 24x52 ultra frame pool. last season all went well and we ended up taking it down after the season to relevel ground for the next spring season. we have the pool back up and leveled, water is in, salt is in with generator working. last season i just used the flexible hoses, but this time i followed the custom intex adapters and that worked well with no leaks. i hard plumbed the system with 1 1/2 pvc piping and now have found that i have a significant difference in water movement...meaning alot less!!! i dont know whats wrong. no leaks, no trapped air. my gauge is reading in the middle of the green. with the flex hose last year it was right below the yellow. the system does not have enough pull to even vacuum. has this happened with anyone else? thanks for any help and input.