This works very well. Installs incredibly easily – just push it down into the drain pipe. The rubber flexes to let it easily slide into the 2″ drain pipe, but it seems to seal off the pipe perfectly. Another reviewer said he has to remove it and clean it every 2-3 weeks – that makes no sense… This is intended for a drain that gets infrequent use. (I put it in the drain on my laundry room floor that will not get water down it other than a broken pipe incident or some other rare issue.) Don’t use this in your main shower that gets used daily, it is not a drain cap or drain strainer. This is to prevent the sewer gasses from coming out of a drain, but in most plumbing there is a P-Trap that holds water and seals off the drain from sewer gasses so this is not necessary. I could see using this in a guest bathroom shower that only gets used once a month or something then the water in the P-Trap could evaporate between uses. But a shower with that infrequent use should not have issues with this getting “dirty” and needing cleaned.
