Posting a message to the forum will remove the above advertisement
  1. Checkout our Plumbers Insurance area - heavily discounted Public Liability Insurance and Van Insurance specifically designed for plumbers.

Discuss Resiting washing machine. Help with waste in the Plumbing Forum area at

  1. 1animal1

    1animal1 Member

    Hi, I'm looking to move my washing machine into our garage which backs onto the kitchen, with a floor approx 6-8 inch lower. The issue being that the drain is on the adjacent kitchen outside wall, 3.5 metres away.. I can get the waste between the joists to come out level with the external open drain. My concern is the pretty low drop for that 3.5 metres... Can this be countered with thicker pipe, 40mm perhaps... Or with a taller neck to ensure that the water gets some speed behind it, before hitting the bend and subsequent 3.5 metre run..

    Are there regs as to the height of the waste too? At the washing machine end?

    Also curious if I can cap some how to prevent little critters creeping into the garage.

  2. Best

    Best Trusted Plumber

    It is supposed to be 40mm anyway.
    If you can have the pipe with a constant fall, - maybe clip it to side of a joist every 50cm?
    At washing machine you use a washing machine stand pipe which has a trap, - or buy a running trap (pipe to pipe), to prevent smells etc.
    Normally the top of stand pipe is best fairly high - about 80 cm if you can manage.
    • Like Like x 1
  3. 1animal1

    1animal1 Member

    Thanks best

    The running trap would be ideal, as with a 3 metre run, I have space to get this under the floor when connecting the remaining length.

    Can you get solvent running traps? I can't seem to find any googling.

    It might be a problem initially strapping to the joist as I can't get to the middle of the floor for at least a year... When I'll load the dish washer into the same pipe when the kitchen comes out. I'll make sure it is propped for now, chuck a couple bricks under... With a decent run on it, and no uphills..
  4. Best

    Best Trusted Plumber

    You really want any traps to be accessible.
    Traps are either push fit or compression joints.
    If you can't get at all the pipe to clip it, you could clip the waste pipe before you install it, by clipping it to a long length of timber, - say 4"x 1" with the 4" vertical and put the timber across wall plates etc. Means the pipe won't sag
    • Like Like x 1
  5. 1animal1

    1animal1 Member

    Love that plan! I've got plenty of timber sat around for that...

    I was avoiding the accessible trap because it's going behind a new boiler site with a few 22mm pipes heading straight for the 40mm exciting the wall (pipes in process of being fitted). I suppose I could come out of the wall and mount the trap away from the wall..

    It's difficult as I'm trying to gauge where the new boiler, unvented cylinder or large floor mounted combi will go into a particular corner, when laying new pipes, so trying to mount this waste as far out of the way as possible
  6. 1animal1

    1animal1 Member

    Update : I have managed to lay one piece of 3 meter solvent which shouldn't need the wood attaching as it appears pretty rigid.

    The problem i now have if you can call it that is the drop is about 3 inch over the 3 meters - will this be adequate? To get to the outside hole I've cored, I need to drop a further 6-7 inch with the remaining half meter - I only have tight solvent 90's (bulk bag) so presume i'll be best buying the 45's for this drop to ensure it remains flowing...or will it not matter with the flow of a washer?
    • Friendly Friendly x 1
  7. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Yes but won't harm an extra inch or two but fine normally 20-25 per m

    And yes 45 would be better
    • Like Like x 1
  8. 1animal1

    1animal1 Member

    Thanks Shaun

    I was thinking about flow and also if i ever need to use a drain rod - given it'll be under the kitchen floor and largely inaccessible.

    I couldn't get any lower where i though i would have been able to, to get the bigger drop- the back part of the kitchen has been extended, so without taking more floor out and getting the angle grinder in to take the lower part of the old wall out..

    Should be pretty easy to get this in from here - music to my ears :)
  9. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    If you can install a rodding point on the end or somewhere
    • Like Like x 1
  10. 1animal1

    1animal1 Member

    it literally is a straight pipe into the garage which sits lower than the kitchen by about a foot - so to rod, it would just be a case of pulling off the washer stand pipe and I'm straight into the 3 meters length
    • Like Like x 1
  11. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    That's fine then :)
    • Like Like x 1
  12. JayThePipe

    JayThePipe GSR

    Just make sure it runs the correct way. I've been to houses where the main drain has blocked up and it's filled the washing machine full of dirty water. So maybe a standpipe may be best option
    • Like Like x 1
  13. 1animal1

    1animal1 Member

    It does jay, connected stand pipe up and chucked a hose down the top... Works perfectly :)
Similar Threads - Resiting washing machine Forum Date
Washing machine hose Plumbing Forum Apr 1, 2018
2 washing machines and dishwasher Plumbing Forum Mar 21, 2018