"I am pretty sure this item significantly influences the average income of all plumbers. This gas operated plunger works nearly perfectly. All you have to concern about this item is/are:
1. when u use this, the brownish water in the toilet splashes pretty much. get rid of anything, near the toilet, you want to keep them clean before you use it.
2. get enough CO2 canisters. sometimes u need to use more than 1 canister in order to unclog your toilet.
i think i gotta run to the nearest HD and get more canisters as i ve just used the last one."