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Maximum length of toilet waste pipe?

Discussion in 'Plumbing and Central Heating' started by Gav74, 17 Jun 2010.

  1. Gav74

    Gav74

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    That's the crux of it, for the long story...

    Paid a builder to install a soil pipe for a new downstairs shower room and get all necessary permissions/certificates etc.
    Builder did all the work, but didn't supply building control documentation.
    I got onto him and he denied that he was supposed to do that. No written contract, so I just left it at that.

    Got the building control guy in, he looked at it for 5 minutes and told me it was a shoddy job, but we can work around that, however, it's plumbed into a rain-water drain and we can't use it! Grrrrrrr.

    Anyhoo, the main soil pipe is on the total opposite side of the house and so is the foul-water drain. To correct this situation, I'll have to get a trench dug from the front to the back and it'll be a nightmare (concrete paths etc).

    I don't want a macerator, because it won't fit in with my nice new bathroom gear including the very expensive toilet unit!

    The floor joist run from front to back and there's enough space to allow the 1 in 40 drop, but it's 23 feet from front to back. Is it allowed to be that long?

    EDIT: Just realised, I didn't say, I want to run the waste pipe under the floor boards 23 feet from the front to the back of the house to reach the soil pipe...
     
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  3. Happyplumber

    Happyplumber

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    The important thing is that you have manhole and inspections pots, the correct fall. The length wont be problem as long as it is done correctly
     
  4. Agile

    Agile

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    I dont think that there is any reason why the soil pipe could not go under the floor if there is space.

    This should be a lesson to others NOT to use a dodgy builder who is going to connect a toilet to a rain drain and then pretend that he was not asked.

    Its generally considered that the person actually doing the work has the responsibility for obtaining any consents required.

    An application for BR consent carries a charge, possible about £120 for a new WC.

    I do have to say that many householders would sue the builder for the cost of putting the situation right!

    Tony
     
  5. mysteryman

    mysteryman

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    Legalities apart, it is OK with a 1 in 40 fall if you have access for rodding.
     
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  7. Agile

    Agile

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    Yes. Thats the standard fall.

    There should be an inspection chamber at any change of direction although I think that you can have one slow bend, probably limited to 45° as long as its going to still be roddable.

    Generally its best to have access at all changes of direction.

    Tony
     
  8. Nige F

    Nige F

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    23 feet is no bother - 1;40 can be lowered to 1;60 at that length IF you have to . Access from outside is fine too ( check with BC) because the pan is cleared from inside - and you don`t want to open up acess caps under floors :mad: . Well ,it worked for me @ my last house for more than 15 years - never unscrewed the access plug once ;) PS you`ll need a stub stack with aav next to the pan - Maybe your builder didn`t do this :cry:
     
  9. Agile

    Agile

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    One of the most amusing bad jobs I have seen was a bathroom with an open grill in the floor.

    Looking down this grill you could see the toilet effluent running through when its flushed!

    Tony
     
  10. Gav74

    Gav74

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    :eek: Nasty!
     
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