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

Air vent brick in the drains

Discussion in 'Building' started by lettywetty, 16 Mar 2020.

  1. lettywetty

    lettywetty

    Joined:
    9 Mar 2009
    Messages:
    114
    Thanks Received:
    0
    Location:
    Surrey
    Country:
    United Kingdom
    Hi,

    I am cleaning up my bungalow following a rental period.

    I think I have a problem with the drain.

    The kitchen sink and the washing machine are connected to the same drain outside right under the kitchen window. It is a 100 year old house so it is done the old fashion way, the 2 evacuation pipes reach an open drain with a grid, the drain being connected to the main sewage. See my photos.

    Because of the grid, if the occupants of the house throw a lot of grease or rubbish in the kitchen sink, the grid gets covered and the open section of the drain fills up, overflows... It can be messy and occupants sometimes think that the drains are blocked when they are not, just the grid is dirty and does not let the water going further in the drain.

    Cleaning that this week-end, I removed 2 buckets of grease of the drain and rubbing again the sides of the wall at that level, I saw 2 holes which are the holes of a metal air brick, in the drain (on photo3, 2 black holes over the white pipes, this is the bottom of an air brick almost invisible).
    All that explains the funny smell in the house, specially the kitchen, I always thought it was smelling "old and mouldy" but normal in an old bungalow (we bought the bungalow only 3 years ago).

    Anyway, I don't think that it is good as obviously dirty water leaks from the air brick under the house.

    The air brick is positioned on the vertical back wall 3cm over the white pipes and maybe 15cms over the half clay pipe forming the drain, it must have been built like that. It shoudn't be a problem if people clean regularly the grid of the drain but if dirty water builds up in the open drain, than it leaks under the house.

    How can I fix that? Is it common in old houses? Should we remove the metal air brick and replace by a normal brick? Should we apply a bit of cement or another product over the air brick to block it? What else could we do?

    I will ask my husband to throw a bit of acid in the drain to clean and clear the all thing and maybe to show a better picture.

    Thanks.

    Letty
     

    Attached Files:

    Last edited: 16 Mar 2020
  2. Sponsored Links
  3. Nige F

    Nige F

    Joined:
    28 Jun 2005
    Messages:
    20,424
    Thanks Received:
    1,571
    Country:
    United Kingdom
    NO don't throw acids or strong stuff about ! Those 2 pipes need altering to discharge straight down into the gulley - chuck that grid away . You might get a plastic grid and cut holes for the pipes but it's not a necessity. The water going straight down will help clear the gulley. Jeyes Fluid is the stuff to splash around the gulley(y)
     
    • Like Like x 1
  4. lettywetty

    lettywetty

    Joined:
    9 Mar 2009
    Messages:
    114
    Thanks Received:
    0
    Location:
    Surrey
    Country:
    United Kingdom
    Hi,

    By acid I meant this: https://shop.wessexcleaning.com/one-shot-drain-cleaner
    When I opened the lid of that drain, there was a pile of muck standing there, I removed 2 dustpans of grease and other smelly rubbish.
    I just want to be sure that nothing worse could possibly blocked the drain further.

    You have a good idea there, I am bothered not to have thought about it myself before, we'll do that

    What about this air brick in the wall at the level of those plastic pipes exit, should I block it anyway? with what?

    Letty
     
  5. bobasd

    bobasd

    Joined:
    2 Dec 2017
    Messages:
    2,373
    Thanks Received:
    448
    Country:
    United Kingdom
    he's not shown up yet but there's a dangerous fool who comes on these forums, and only the other day advised an OP to plunge his hand down gullies without the benefit of gloves - he was corrected.
    at a later date (today?) he now suggests to use a black bin bag as a glove when cleaning out drainage.

    OP,
    you've been well advised - dont use any of these chemical concoctions, they all contain dangerous ingredients for the attending plumber.

    fwiw, i can hardly make out whats in your photo's?
     
  6. Ian H

    Ian H

    Joined:
    14 Sep 2010
    Messages:
    6,316
    Thanks Received:
    714
    Location:
    Rochdale
    Country:
    United Kingdom
  7. HERTS P&D

    HERTS P&D

    Joined:
    9 Apr 2010
    Messages:
    10,060
    Thanks Received:
    1,490
    Location:
    Hertfordshire
    Country:
    United Kingdom
    I wonder who Bob is talking about?

    :ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO:

    Andy
     
    • Like Like x 2
  8. endecotp

    endecotp

    Joined:
    2 Dec 2013
    Messages:
    3,425
    Thanks Received:
    428
    Country:
    United Kingdom
    No, don’t block it. You need ventilation under the floors.

    Follow the others’ advice about improving the drain, and then if necessary think about what to do with the air brick.
     
    • Thanks Thanks x 1
  9. lettywetty

    lettywetty

    Joined:
    9 Mar 2009
    Messages:
    114
    Thanks Received:
    0
    Location:
    Surrey
    Country:
    United Kingdom
    Hello,

    I am in the process of improving the drain.
    I have uncovered the air brick and will make nice around it.
    As advised, I will re-organise the plastic waste pipes (will join the 2 in 1) and make it go through the gully grid to avoid any further flooding due to dirty grid.
    The grid is metal. It is very old and have a funny size, it is 5".
    My problem is that I would need to replace it with a plastic one to be able to cut a hole in it but I cannot find anywhere that size in plastic.
    150mm is too big. I could have a 110mm as there is a lip further down the hopper but I cannot find that size either.

    Where can I find a 110mm grid please?

    Shall I buy a 150mm a fiddle with it (won't be nice and I like when it is neat!)?

    Thanks.
    Letty
     

    Attached Files:

  10. Sponsored Links
  11. Ian H

    Ian H

    Joined:
    14 Sep 2010
    Messages:
    6,316
    Thanks Received:
    714
    Location:
    Rochdale
    Country:
    United Kingdom
    Cut down a 150mm one
     
  12. oldbutnotdead

    oldbutnotdead

    Joined:
    11 Jan 2013
    Messages:
    2,956
    Thanks Received:
    564
    Location:
    Durham
    Country:
    United Kingdom
    That airbrick isn't ideal where it is- as you have found with the musty smells coming into the place. I can't tell from your pics where the airbrick is in relation to the actual gulley- if the gulley is on the left of the drain thing & the airbrick is on the right then reudcing the size of the drain thing will help significantly.
    You could put a periscope on the airbrick but it would look rubbish. You could duct it above the drain thing but again it would look rubbish.
    If you have any access to the subfloor, putting a new airbrick in would be the best bet, you can then block that one up
     
  13. Nige F

    Nige F

    Joined:
    28 Jun 2005
    Messages:
    20,424
    Thanks Received:
    1,571
    Country:
    United Kingdom
    No don't join the 2 into 1 - you will get one discharge pulling on the other pipe - keep them separate -or you will get smells because the traps are being "pulled". Plenty of room for 2 pipes to go down through the modified plastic grid. PS . Don't worry about bobasd and his comments - we finally got him banned ( and his 3 other aliases) (y)
     
    • Like Like x 1
  14. johnny2007

    johnny2007

    Joined:
    11 Jan 2012
    Messages:
    944
    Thanks Received:
    145
    Location:
    London
    Country:
    United Kingdom
    When you're done, tell anyone who lives there that drains are not designed to dispose of oil and fat.
    A few weeks ago Thames water sent out a team for cyclical maintenance of shared drains after 12 years.
    They commented on how clean our drains were compared to the other terrace down our small street.
    That's because I take everyone's cooking oil to the local tip once a month.
    This is because years ago we kept on getting blockages and the long term solution was to educate the residents.
     
    • Thanks Thanks x 2
    • Like Like x 1
  15. noseall

    noseall

    Joined:
    2 Feb 2006
    Messages:
    38,187
    Thanks Received:
    2,452
    Location:
    Staffordshire
    Country:
    United Kingdom
    I showed a customer their (kitchen) drain after we'd dug it up whilst building an extension. It looked like a furred up artery with an easy 70% reduction in capacity.
     
    • Like Like x 2
  16. johnny2007

    johnny2007

    Joined:
    11 Jan 2012
    Messages:
    944
    Thanks Received:
    145
    Location:
    London
    Country:
    United Kingdom
    You won't believe how many people are ignorant to the fact that cooking oil shouldn't go down the drain.
    Usually they have a prius in the drive, hand sanitizer in their pocket and are fans of Greta Thunberg.
     
    • Like Like x 2
    • Thanks Thanks x 1
  17. HERTS P&D

    HERTS P&D

    Joined:
    9 Apr 2010
    Messages:
    10,060
    Thanks Received:
    1,490
    Location:
    Hertfordshire
    Country:
    United Kingdom
    Not forgetting the amount of wipes that go down the toilet.

    Andy
     
    • Like Like x 3
Sponsored Links
Loading...

Share This Page