Trying to locate a blockage in a 42mm plastic waste solv weld system. I assumed tapping it would reveal all but it isn't. Everything conspires to make each run sound different - different lengths, different support spacings, different angles at the ends & so on. And a fair bit just isn't accessible. I'm not making progress. Any ideas how to locate it? Getting any sort of plunger up there is impossible, over a dozen 90 degree bends ensure that won't work. Caustic & conc sulphuric have been tried without much progress. The plumbing is nowhere near meeting current guildeines in terms of fall etc.NT

My immediate thought was mains pressure water!If you can get to parts then perhaps cut into it and replace with a coupling, preferable non-solvent weld, to find where the blockage is? It would be useful for the next time.There are auger-like pipe cleaners but not sure how they cope with corners.Does this confirm TabbyPurr and Nick Cat are one and the same?

Pipe blockage - where?

Nov 25, 2020 Last reply: 5 years ago 22 Replies

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alan_m 5 years ago

Someone washing their cementing or plastering tools in the sink?

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Andrew 5 years ago

The main drains for most of the estate where I live is 4 inch.

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Nick Cat 5 years ago

That produces hard lumps. This was all gloop. I don't know anything much that withstands conc caustic AND boiling suphuric, other than this mysterious stuff.

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