How do you repair a small hole in a Doughboy pool filter tank?

Epoxy. The contemporary epoxies work fabulously, and all you need to do is isolate and drain the tank enough to get it dry so the epoxy will stick. Rough up the surfaces just a bit. Find something very sharp that will fit in the hole and bend it so you can "hook" the inside and "scritch" it to rough it up inside if you can. Make sure you do all your prep work before you mix your epoxy. There is a direct correlation between the effectiveness of an epoxy job and the effectiveness of the preparations. If you can "hook" a bit of the epoxy inside to get it to stick inside the tank around the hole, then when you plug the hole and make a little "button" on the outside, the epoxy will take the form of a sort of "rivet" in that hole and it will be rock solid. The type of epoxy to use depends on what the tank is made of. Your hardware store will have someone who can help select the correct one. Read the directions. Professionals who are using a product for the first time (or for the first time in a while) read the directions to gain clarity on the use of adhesive products. Only the unwise person skips the directions. Good planning preparation and execution = a good finished product or job. Good luck. A: It is foolish to try a repair on a tank that is pressurized in anyway. If the tank is already compromised with a crack then an epoxy or any other of patch is NOTrecommended - PERIOD. The tank will continue to split out beyond the repairs. Secondly, if you did not do an outstanding job of cleaning and preping the site then that plug will be propelled at great speeds and could inpale someone or put their eye out. THE QUESTION IS - DO YOU CARRY ENOUGH LIFE OR HOMEOWNERS INSRUANCE TO COVER NEGLIGENCE??? If someone were to be standing next to the tank when it explodes they could be seriously hurt or worse. I have known and seen the results of filter tanks that have exploded when the person was adjacent to or even near the filter.