Weiss, I just re-read you're post. It doesn't matter which inlet you use, the top inlet has a small tube in the back-center that routes the upper inlet to the bottom of the casing. I unclog mine by CAREFULLY adding pressure to the inlet of the filter with water pressure from my tap water. After it starts to flow, run the sand to nearly the top and quickly reconnect your filter discharge hose before the sand settles in the bottom again. Keep a close eye on the clear filter housing for too much expansion or it will rupture. You'll probably hear some minor carcking sounds though. Fortunately, an email to PentAir got me a free replacement filter the first time I uncloged mine........................ That wet sand never completely comes out of the carpet, but it gave my wife one heck of a laugh when she saw me covered in it!
Ps.
when I put my last filter in, I added a hose bib and valve just to restart the filter in case of power outages and heavy cleaning maintenance purposes. Turns out that I can power drain my 150 gallon tank with the hose bib too.
Last edited by Rainman; 12/05/08 04:37 AM.
