1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

How to plumb kitchen sink drain

Discussion in 'Plumbing and Central Heating' started by hary123, 5 Oct 2021.

  1. hary123

    hary123

    Joined:
    26 Sep 2021
    Messages:
    25
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi

    I usually do diy plumbing like compression fitting, push fits and changing valves and taps but it's a puzzle for me how to plumb kitchen sink drain.

    The 1.5 drain kit came with the sink, I have attached 2 parts to my existing drain pipe (the black pipe) as in pic below and left with 4 parts as in the second photo marked 1,2,3 and 4. parts 3 and 4 are the same.

    I put the blue cup on part 2 as don't need drain for washing machine or dish washer.

    What to do next? In simple terms please. Any youtube vids? couldn't find any.

    Thanks
    drain1.jpg
    drain2.jpg
     
    Last edited: 5 Oct 2021
  2. Sponsored Links
  3. terryplumb

    terryplumb

    Joined:
    8 May 2017
    Messages:
    6,159
    Thanks Received:
    1,276
    Country:
    United Kingdom
    Parts 3&4 each connect to the strainer wastes ,and can be cut if required to shorten the length ( particularly the one connecting to the deeper sink.
    Part 2 connects to the long end of part 1. Once they are joined it connects to 3 & 4.
    Remove the trap from the black waste pipe and connect it to bottom of part 2.
    You then extend the black waste pipe ,using elbows and more pipe to meet the trap outlet .
    You need to shorten the flexi overflow pipe ,making it like an L shape.
     
    • Thanks Thanks x 1
  4. johnny2007

    johnny2007

    Joined:
    11 Jan 2012
    Messages:
    3,940
    Thanks Received:
    581
    Location:
    London
    Country:
    United Kingdom
    Chuck all of that away and buy a mcalpine trap.
     
    • Like Like x 1
  5. CBW

    CBW

    Joined:
    26 Sep 2019
    Messages:
    9,020
    Thanks Received:
    2,407
    Location:
    North
    Country:
    United Kingdom
    Tbf, that looks like a McAlpine trap kit :whistle:
     
    • Like Like x 1
  6. hary123

    hary123

    Joined:
    26 Sep 2021
    Messages:
    25
    Thanks Received:
    0
    Country:
    United Kingdom
    Thanks for reply
    Can I do as in photo? Then use McAlpine Flexi Waste Connector 1 1/2", photo attached to connect black pipe to the trap. Trap will be higher than the black pipe.
    Obviously haven't cut pipes to size yet
    Drain4.jpg
    flexi waste connector.jpg
     
    Last edited: 6 Oct 2021
  7. terryplumb

    terryplumb

    Joined:
    8 May 2017
    Messages:
    6,159
    Thanks Received:
    1,276
    Country:
    United Kingdom
    Yes ,you can if you wish .obviously trap outlet needs to be Higher than black pipe.
     
    • Thanks Thanks x 1
  8. hary123

    hary123

    Joined:
    26 Sep 2021
    Messages:
    25
    Thanks Received:
    0
    Country:
    United Kingdom
    Is this in pic acceptable? Flexi pipe is stiff so was only way to connect. Pls don't be too critical.

    I tried elbow but tedious, not enough depth.

    Thanks

    drain.jpg
     
  9. terryplumb

    terryplumb

    Joined:
    8 May 2017
    Messages:
    6,159
    Thanks Received:
    1,276
    Country:
    United Kingdom
    It will drain ,but it doesn't have a continuous fall . The sagging section is likely to collect crud and start to clog up in time.
    You may be able to swing the trap outward ,and turn the outlet elbow inward ,in order to get a continuous fall.
     
    • Thanks Thanks x 1
  10. Sponsored Links
  11. hary123

    hary123

    Joined:
    26 Sep 2021
    Messages:
    25
    Thanks Received:
    0
    Country:
    United Kingdom
    Do you mean like this? Is this better?

    Thanks

    drain.jpg
     
  12. terryplumb

    terryplumb

    Joined:
    8 May 2017
    Messages:
    6,159
    Thanks Received:
    1,276
    Country:
    United Kingdom
    Yes ,that looks better ,hard to tell from pic ,does it now have a continuous fall or does it still sag ?
     
  13. hary123

    hary123

    Joined:
    26 Sep 2021
    Messages:
    25
    Thanks Received:
    0
    Country:
    United Kingdom
    Less than 5mm, acceptable?
     
  14. terryplumb

    terryplumb

    Joined:
    8 May 2017
    Messages:
    6,159
    Thanks Received:
    1,276
    Country:
    United Kingdom
    I wouldn't worry too much about it. If it starts to collect crud ,it's easy enough to take it off and clean it :D
     
    • Thanks Thanks x 1
  15. JimCrow

    JimCrow

    Joined:
    31 Jan 2011
    Messages:
    655
    Thanks Received:
    228
    Location:
    St. Kilda
    Country:
    United Kingdom
    • Like Like x 1
  16. hary123

    hary123

    Joined:
    26 Sep 2021
    Messages:
    25
    Thanks Received:
    0
    Country:
    United Kingdom
  17. JimCrow

    JimCrow

    Joined:
    31 Jan 2011
    Messages:
    655
    Thanks Received:
    228
    Location:
    St. Kilda
    Country:
    United Kingdom
    Yes, it has a 1-1/2" bsp thread that will screw on to the sink strainer and the other is multifit.

    multifit.JPG
     
    • Thanks Thanks x 1
    • Like Like x 1
Loading...

Share This Page