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Discuss Looking for advice regarding a sink waste pipe behind toilet waste pipe. in the Fittings & Pipes area at

  1. tmm

    tmm New Member

    My sink waste pipe is behind the toilet waste pipe and i need to somehow get my sink waste over the top or under my toilet waste pipe. My sink is going to be fitted other side of bath approx 8 foot from main waste outlet. If i fit a 90 degree bend up and over and back down to the floor and run a waste pipe to my sink under the bath would the waste still work and run outside?
    I have attached a photo. Sorry my description is not the best.

    waste pipe.jpg
    Last edited: Mar 9, 2018
  2. Riley

    Riley Plumber GSR

    Gonna need more info as I’m afraid that makes no sense do you mean basin waste or a sink waste as we’d treat the two as different. Sink kitchen basin bathroom. It sounds as if you’re asking if water will drain if you make almost an “n” shape over the toilet waste pipe. Water will not run up hill
    • Agree Agree x 1
  3. tmm

    tmm New Member

    Hi Riley
    Its a basin bathroom
  4. tmm

    tmm New Member

    Yeah that’s what I’m asking Riley. Do you know another way of doing it then?
  5. Riley

    Riley Plumber GSR

    Well the only way to do it is with a continuous fall to avoid blockage. I don’t mean to sound rude but your pic doesn’treally show anything. Perhaps draw up a plan of the bathroom and post. I assume you’re doing it yourself??
    • Like Like x 1
  6. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    The only way is to bring the basin waste above the toilet one can't go lower than what's already there

    Hope this makes sense
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