Honestly, I get where you’re coming from, but I think a lot of the issues crop up with cheaper or badly-designed models. I’ve swapped in a few decent low-flow toilets for clients, and as long as you get the right brand and set them up properly—especially checking the trapway size—they clear just fine. Some older plumbing systems don’t play nice with them, though. Had one place with ancient cast iron pipes that just didn’t cooperate...but in newer setups, the water savings can be pretty significant without all the hassle. Guess it’s really about matching the toilet to the house.
Guess it’s really about matching the toilet to the house.
That’s a good point about older pipes. I’ve seen backups happen when folks try to force a modern low-flow into a house with ancient plumbing. Ever run into issues with venting or slow drains after a swap, or is it mostly the trapway and pipe size?
Yeah, I’ve noticed slow drains pop up more with older venting setups, especially in houses where the original stack hasn’t been touched in decades. Sometimes it’s not just the trapway or pipe size—venting really can make or break the whole swap. Matching everything up makes life a lot easier.
That’s interesting—makes me think about a job I had last winter. Swapped in a low-flow for a client in a 1950s house, and the venting was original cast iron. Even after clearing the lines, the new toilet just wouldn’t flush right. Ever run into cases where even snaking the vent didn’t help? I always wonder if there’s a “sweet spot” for matching old venting with these newer toilets, or if sometimes it’s just not worth the hassle.
Ever run into cases where even snaking the vent didn’t help?
Yeah, had a similar headache with my own place—snaked the vent, checked everything, still got that sad little swirl. Wonder if some of these old pipes just don’t play nice with modern toilets. Has anyone tried just going back to a regular flush model and called it a day?