I used an old toilet tank. Fill through the flush valve the float keeps the tank full. Reduce size of the outlet to accept 3/4 PVC. A leinth of PVC with T every foot or so with a nipple. I made this and have used it for 2 years never touched it again the water is always fresh and clean. I have pictures but I can't figure out how to post. I can send them through Kodak if you send me an email address. [email protected]