Waterless Trap Seal, 4 Inch

Works immediately—just put it in the sink, and it eliminates odors right away. However, be aware that it may slightly slow the drain, though it's a minor trade-off compared to getting rid of the smel

We have a floor drain in our basement that is prone to backing up and flooding. It drains our kitchen area and I think the horizontal pipe is maybe slightly flat so if the lines gets gunked up which seems to happen frequently we get a back up until I can go clear the line. The floor drain in our basement is also the drain for our sump pump and this allows water to pass through it while keeping backflow out of the basement. I can tell when the line gets clogged as our kitchen sinks will drain a bit slower and I can either auger it or put down some drain cleaner which will pass whatever is in there but we are no longer getting a back up into our basement which is great. It's a bit expensive but worth the cost for the peace of mind.

New to us townhouse has a stinky basement shower drain. Every time one of the 3 toilets from anywhere in the house flush, stinky fumes would come out of the drain. My investigation tells me a working p trap was installed and there was no evidence of clog or blockage in the system. Stink is most probably the result of an inefficient vent system in the drains. More costly solution was to install another vent = $$$.I stumbled upon this product while researching solutions for my problem. Installation took less than 5 mins. Pop the drain, make sure drain pipe is clean, drop this device into the pipe and push to make sure the rubber “fins” provide a good seal around this device and the inside wall of the pipe. Ran the shower full blast for around 5 mins to see wether water pools on the floor which may indicate draining is slowed down. Surprisely, no change. So I filled up a bucket of water about half way and dumped everything into the shower floor while shower was still running. Water initially pooled in the floor but was gone in a few seconds. Yehey! There’s no significant slowing of water draining!Before I installed this device, I read reviews that say draining slowed down to the point of water pooling on the floor while taking a shower. That was my biggest concern. Almost everybody was saying this product kept the stink out but had that issue of slow draining. For those having problems witn slow drain with this product, try pushing the device deeper into the drain. That will help build more water pressure between this device and the water on the floor. Also, it may help using a shower head that is one of those water efficient kind rated for 1.5 gallons per minute.Very happy to get rid of that annoying stink!

This does not help reduce odors in any way. I have a walk-in shower and the drain can give a bad sewage gas smell at times. I got this product after cleaning the drain and doing everything I could to help reduce the smell. This item has honestly helped 0%. Even if it would have reduced the smell a small percentage I would accept the results. But 0%? That's just a waste of $35 that I wish I could have back.

…the water flow through the valve is much less than using a drain ball valve device. I put the green trap seal into a floor drain in a sump pump overflow area. The sewer smell is gone, but the water flow through the valve is much less than when using a ball valve device. So beware that the flow through the valve may not meet your needs.

We have a 100 year old house and the main floor drain in the basement would routinely have sewer gases coming from it. Our washer, dehumidifier, and condensation from the a/c empties into the drain so we couldn't just cover it. This works perfect and we no longer have periods where our house is stinky. The pipe is 4 inches, and this fit perfectly and is well sealed (aside from the area that lets the water still flow through). We have not smelled any sewer gases since installing this.

I have tried all of the other ones this one right here fits a standard 2” pvc pipe unlike any of the other ones !! It seals really good and so far so good ! Some ppl say it only lasts a year I can prob agree with that but I don’t care if I have to buy 1 a year it’s worth it if I don’t have to smell my drain anymore ! It slows the drain just a little bit but not enough for any concern at all,and they do make a high flow that I wasn’t aware of when I bought this one !

Got this for my shower. I don't know where the **** ***** *******'in roaches are getting in, but plenty of websites said that they can come in through the plumbing and especially in the shower, so I got one of these to put in the shower drain. It's basically a solid plug, with soft rubber flaps on the bottom that will get pushed down by the weight of water above them, allowing the water to pass through, and then they'll tighten back up when the water's gone.It works. Those little **** ***** ***** ****s can crawl through that pipe but they won't be able to get in, and they won't even try because they won't see a big gaping hole shining bright light into their subterranean pipe hellhole that they live in.BUT: you gotta adjust it so that it doesn't leave you standing in a couple of inches of water! This device slows down your drain, and if you don't do it just right, you'll finish your shower ankle-deep in water that will slowly, slowly drain out. It will eventually clear, but it'll take a few minutes.The trick is, you gotta concentrate the weight of the water so the flaps open quickly and fully. The way you do that is by shoving this thing as far down the drain as you can get it. If you can get it about six inches deep, then you'll have six inches of water weight pressing down on the flaps and they'll open fully and then it drains like a normal shower, while also blocking roach highway. I've got this thing shoved down the drain as far as my fingers can get it. But then you've got the problem of when it eventually gets clogged with hair; you have to have a way to get it back out, which for me involves a long-arse set of needlenose pliers.So it works, but it's a bit of a hassle, so that's why the 3-star review.