Hi - I just completed following instructions on the super helpful post about deep cleaning the sand filter. I've now put everything back together and opened the pool, and the sand filter is now leaking (slowly) around the collar, and leaking out of the waste valve while the filter is on the "filter" setting. The collar is super tight - any tighter and I'm afraid I'm going to break the screws. Also I can't figure out why water is coming out (slowly again) of the waste port. Any ideas on this? Was I supposed to wrap anything in teflon tape after taking off the top of the filter to clean it?