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Advice on laying drain and sewerage pipes

  • 26-02-2008 3:40pm
    #1
    limerickbuild
    Closed Accounts Posts: 47 ✭


    hi all, am going to be laying the pipes to soakways and for the sewerage pipes to the septic tank and onto the percolation area in the next few weeks so wanted to start with getting advice and where to read up and know what i am about to let myself in for!
    had a quick look through the threads but didn't find anything specific.
    What I should watch out for? Important things to consider/ remember.
    Thanks in advance.


Comments

  • #2
    250882
    Closed Accounts Posts: 206 ✭✭250882


    If gradients are too low the pipes will get blocked, if too great it will cause syphonage. Lubricate the rubber seal on wavin pipes with washing up liquid before connecting them.


  • #3
    ircoha
    Closed Accounts Posts: 2,290 ✭✭✭ircoha


    the pipes that will be carrying the 'solids liquids and gasses':) need to be at 1:40 slope and care taken with proper bedding and cover before backfill.

    Use a proper lub for the joints, eg Griffon P-20, the washing up liquid drys out at the rubber/pipe interface and can make opening the joint again very tricky if u need to while laying the pipes.

    Provide for AJ's and inspection chambers.

    Are u doing an air test or water test for certification purposes?


  • #4
    MickLimk
    Closed Accounts Posts: 188 ✭✭MickLimk


    Run absolutely nothing but rain water into the soak aways! I had a washing machine and a downstairs bathroom sink running into a soak pit with the rain water. This completely backed up due to the gunk that came from the washing machine. I now have to change this over to run into the septic tank and it also looks like I'll have to dig up some of the soak pit to get the whole thing flowing again...

    Do it right the first time! Have a look at Part H of the Building Regs to make sure that you don't miss anything.


  • #5
    sinnerboy
    Closed Accounts Posts: 5,433 ✭✭✭sinnerboy


    You should get hold of homebond manual for this and the rest of the build . Out of print now sadly but new edition imminent


  • #6
    AckwelFoley
    Registered Users, Registered Users 2 Posts: 12,556 ✭✭✭✭AckwelFoley


    If you could upload a copy of the plans or a link to where u have it uploadewd with how you intend to do the layout, then we could look at it and suggest any changes.


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  • #7
    limerickbuild
    Closed Accounts Posts: 47 ✭limerickbuild


    Attached is a copy of the site layout and I have marked some Soakways for water runoffs from gutters with S.

    THen the septic has 1 line from behind house (light blue colour) and 1 line coming across the front of house for the bathroom/ensuites (water/sewerage) and Kitchen/utility grey water lines.

    Site itself it sloped downwards from back of site to road. so i'm bringing all soakways with fall of land.

    Should u keep these soakways away from septic ( i.e. should i move the one that is behind/above the septic tank.
    Going for a precast concrete septic tank.
    Found a neighbour who has done 2 houses recently who i might be able to ask to help out and give advise aswell.


  • #8
    sydthebeat
    Subscribers Posts: 41,863 ✭✭✭✭sydthebeat


    I personally would connect the pipe serving the proposed soakaway near the septic tank, to the next one, directly in front of the dwelling.

    reasons.

    1. both proposed soakaways are only taken a small section of roof, so doubling up is not a major issue
    2. keeping soakaways away from septic tanks is a good idea, you might compromise the soil consistency around the septic tank the way its currently laid out, especially considering the fall of land.


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