I made this the other day for doing pool cleanings. Each year more and more customers ask us to clean the pool at the opening. I used a 1hp hayward superpump. A hayward c500 single cartridge filter, 1.5" plumbing, 2 unions, a 3-way valve and a cheap $30 hand truck from Homedepot. I installed the 3way valve so we could either vac the pool through the filter or out to waste. Guess we could use it to drain a pool too if we had to. Just figured id share in case anyone was interested in making one. I couldnt figure out a way to mount the filter to the cart so i just used a rachet strap and it worked out perfect!