Review on 9-in-1 Air Pressure Plunger Kits - Powerful Drain Blaster Gun with 5 Heads for Clogged Toilets, Kitchen Sinks, and Bathroom Tubs by Madansaireddy Aldridge

Unfortunately my toilet clog cleared up on its own before I tried the product on the clog. However, I tested it in a clear toilet and it seems to have plenty of power even at 1 (15 psi). During the first few injections the pressure will not show on the manometer, but after that many injections the pressure will start to rise rapidly. 3 or 4 is recommended for a toilet, but even at 1 this thing is loud and has a lot of recoil, like a gun. I suggest trying it on 1 or 2 on a clog to see if that's enough. Make sure to keep the barrel firmly in the hole or it will shoot back and squirt water everywhere.