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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthorRex
    • CommentTimeSep 13th 2018
    What ho one and all,

    Have been doing my bi-annual basin / bath trap clean and replaced one basin S bend with a bottle trap.

    What always amazes me is the amount fo (organic?) growth in the trap and pipe. I frequently throw some bicarb of soda and vinegar down but it seems that does not make much difference.

    I have a section of the basin / shower drainage pipe that goes around 2 meter under the floor (with a slight fall) to the main sewerage downpipe. Since this is inaccessible, I would guess there is quite a lot of growth, gradually blocking the pipe.

    I am loath to get the pressure washer into the bathroom to blast it out, so what are other solutions?

    Since normal 4" sewerage pipe has push-rod with half moon scrapper and/or rubber push ends, is there something like this available for normal 1.5" drain pipe?

    Toodle pip and thanks

    • CommentAuthorowlman
    • CommentTimeSep 13th 2018
    A lot of the slimy gunge in smaller pipework is from soap deposits. Chemical cleaners do remove/dissolve it, especially if left overnight. Straight runs with a fall are usually less of a problem.
    Maybe you're reluctant to use them?
    • CommentAuthorRex
    • CommentTimeSep 13th 2018

    Following your comment, I have Googled chemical cleaners and everything I find appears to be industrial and not sold for the DIY user.

    What chemicals do you suggest?
    • CommentAuthorowlman
    • CommentTimeSep 13th 2018
    One of these may be of help:-

    • CommentAuthortony
    • CommentTimeSep 13th 2018
    Caustic soda works well, or a diy drain jetter
    • CommentAuthorRex
    • CommentTimeSep 14th 2018

    Thanks. One of the mental blocks (do I need a mental block cleaner?) I have with the various 'drain cleaners' is that they seem to work for cleaning around the trap. How do they clean 3 m along the pipe that is under the floor?

    Having replaced an S bend under the basin with a bottle trap, I had to fit a length of flexi drain to get is all in place. I therefore had to cut an accessible section of the horizontal (ish) existing drain pipe, about 1m from the trap. This is 1.5" pipe and I would guess that the gunge is occupying round 1/4 of the internal bore diameter, albeit on the bottom.

    I don't have a flow problem but it will certainly not clean itself. I can't see how something poured down the basin will remove (or loosen) all the growth 2-4 meters from the basin. Or am I missing something.
    • CommentAuthorowlman
    • CommentTimeSep 14th 2018
    Can't you temporarily block the "other" i.e. outlet end and then fill the pipe and leave it for a few hours. Or push a hose down and flush it.
    • CommentAuthorRex
    • CommentTimeSep 17th 2018

    A hose may be the way to go. Flexible enough to go around the bends and nothing to prevent it being extracted. A straight cut leading edge will scrap off the growth and a flush should clear it.

    No. not possible to block the other end. Goes under the floor and into the 4" down-pipe; all enclosed. Only way would be to block at the inspection chamber in the front garden.

    If I knew then what I know now, I would have built-in access points for flushing. Oh well! Next time!
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