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Got pic related and located a blockage about 3,5 meters (11 ft) into the 100 mm (4") diameter drainage pipe. https://pic8.co/sh/82x3Ke.jpeg Tried concentrated lye but didn't help much, it only dissolves organic matter really well. For scale I could use hydrochloric acid but I'd have to use a boatload, I reckon.

Years ago i helped replacing part of the pipe which was blocked in several places with what I guess was urine scale. Pipework is plastic and about 30 years old. The pipe of concern is behind tiles and I'd rather not knock these off, if I don't absolutely have to.

Borrowed a manual drain snake from a neighbor but it's meant for small diameter pipe and a little too wimpy for the job. Looking at something like this now: https://pic8.co/sh/kScVqO.jpeg https://pic8.co/sh/DeUQ3D.jpeg

Does anyone have experience with these and can recommend one that doesn't leave me with a stuck snake in the pipework? Other suggestions?

Got pic related and located a blockage about 3,5 meters (11 ft) into the 100 mm (4") diameter drainage pipe. https://pic8.co/sh/82x3Ke.jpeg Tried concentrated lye but didn't help much, it only dissolves organic matter really well. For scale I could use hydrochloric acid but I'd have to use a boatload, I reckon. Years ago i helped replacing part of the pipe which was blocked in several places with what I guess was urine scale. Pipework is plastic and about 30 years old. The pipe of concern is behind tiles and I'd rather not knock these off, if I don't absolutely have to. Borrowed a manual drain snake from a neighbor but it's meant for small diameter pipe and a little too wimpy for the job. Looking at something like this now: https://pic8.co/sh/kScVqO.jpeg https://pic8.co/sh/DeUQ3D.jpeg Does anyone have experience with these and can recommend one that doesn't leave me with a stuck snake in the pipework? Other suggestions?

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[–] • 1 pt

Sounds like you're going to have to tear things up. Should you go that route, do yourself a huge favor- put the camera down the pipe at the far end of the cut to see a bit farther down the line. There could be another blockage or choke point and you want to make sure there isn't. Mineral deposits in a pipe means, goodbye pipe. Sounds like it's PVC, that stuff is very easy to work with. Measure twice, cut once, clean burrs off, use the stuff to clean, and glue back together. The bigger part of the job will be going through walls, God forbid, concrete. YouTube will familiarize you with working with the pipe, if you're inexperienced. Watch em and wall repair, unfortunately. Best of luck!

[–] • 1 pt

Not what I wanted to hear but if all else fails I'll have to go that route. And you're right, it's probably PVC, might be PP. How fitting :)