Review on 🐠 Enhanced Supreme (Danner) ASP14525 Diaphragm Replacement Kit for AP-20 Aquarium Air Pump by Jessie Wright

Kit includes everything needed to rebuild the pump diaphragms plus a pressure chamber seal. Note that some reviewers downgraded their rating because the pressure chamber seal did not fit into the pump body. Obviously he didn't fit because he wasn't meant for the job. You will need a medium Phillips screwdriver and a 7/32 socket or wrench to complete the repair. Blunt pliers can work in place of a screwdriver/wrench. A socket wrench/pliers is used to remove the small nut that secures the diaphragm to the threaded shaft. You have to be careful not to lose the small metal washer that sits between the nut and the diaphragm. There are few instructions, but if you pay attention to how everything is taken apart, you can make repairs. It is not necessary to replace the high pressure chamber seal unless a chamber leak is detected.