Slow flush from cistern - new toilet

Discussion in 'Plumbing and Central Heating' started by Deisler, 1 Sep 2020.

  1. Deisler

    Deisler

    Joined:
    15 May 2017
    Messages:
    8
    Thanks Received:
    2
    Country:
    United Kingdom
    Good evening,

    I just installed a new back-to-wall toilet unit with new concealed cistern. Everything works fine, apart from the flush from the cistern into the bowl is slow.

    The flush from the bowl into the waste/soil pipe looks normal. The fill value works ok too.

    I do not understand how the flush from the cistern can be slow on a new toilet unit. There is very little water coming out of the holes at the front side of the bowl. I checked the holes - they are not blocked.

    Any idea why this happens?

    * When I fit the flush pipe (the one connects the cistern to the bowl), I remember I cut the length of the pipe so that it goes right to the end of the hole when I push the toilet back to the unit. Do you think this would cause the issue?

    Cheers,
    Jamie
     
  2. Sponsored Links
  3. CBW

    CBW

    Joined:
    26 Sep 2019
    Messages:
    9,724
    Thanks Received:
    2,660
    Location:
    North
    Country:
    United Kingdom
    Not usually, it’s usually a restriction of some sort. Have you checked the flush pipe, and the holes where it connects to?
     
    • Thanks Thanks x 1
  4. Deisler

    Deisler

    Joined:
    15 May 2017
    Messages:
    8
    Thanks Received:
    2
    Country:
    United Kingdom
    The flush pipe is new. I did not check the holes it connects to (because everything is new...).

    The problem is I have already silicone-sealed the toilet with the unit. So before I cut the silicone and make a mess, I want to know exactly what I should check.

    I forgot to add that the water level in the tank is also correct - filling only 20mm below the overflow pipe.
     
  5. lostinthelight

    lostinthelight

    Joined:
    11 Feb 2016
    Messages:
    3,237
    Thanks Received:
    627
    Location:
    monmouthshire
    Country:
    United Kingdom
    Some cones have a stop around the circumference to stop the flush tube going in all the way
     
    • Like Like x 1
  6. CBW

    CBW

    Joined:
    26 Sep 2019
    Messages:
    9,724
    Thanks Received:
    2,660
    Location:
    North
    Country:
    United Kingdom
    I’ve had loads of “new” installs, only to find their flush isn’t strong, take apart and voila, tile spacers clogging up the new flush pipe :whistle:
     
  7. Deisler

    Deisler

    Joined:
    15 May 2017
    Messages:
    8
    Thanks Received:
    2
    Country:
    United Kingdom
    I kinda hope mine does not have that, so it will be an easy fix, i.e. cutting the flush pipe, although I need to cut all the silicone off first.... grrr
     
  8. Deisler

    Deisler

    Joined:
    15 May 2017
    Messages:
    8
    Thanks Received:
    2
    Country:
    United Kingdom
    Just to leave a note here that it was indeed caused by the flush pipe being inserted too tight. Cut the pipe by 10mm and problem solved.....
     
    • Thanks Thanks x 2
    • Like Like x 1
  9. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
  10. Sponsored Links
Loading...

Share This Page