Blocked Double / 1&1/2 sink water trap

Joined
1 Mar 2020
Messages
5
Reaction score
1
Country
United Kingdom
Hi all!
I've recently moved and the home I moved into has a kitchen sink with a 1&1/2 bowl kitchen sink.

I have a 1&1/2 kitchen sink bowl. The 1/2 sink waste is completely blocked and doesn't drain at all. The full sink bowl runs with no problem whatsoever.

I've removed all the pipes from under the 1/2 sink bowl and there is no blockage. Also, the 1/2 sink bowl connects into the waste pipe further down from the full sink bowl so the blockage cannot be anywhere else.

Everytime I remove the pipes, I empty the u bend then when I run the water into the 1/2 bowl, the water seems to fill the u bend and then stop moving.

Can anyone offer advice? Is this some kind of water pressure issue preventing water from pushing down the 1/2 sink waste?
 
Sponsored Links
Joined
1 Mar 2020
Messages
5
Reaction score
1
Country
United Kingdom
DSC_0537.JPG


The full sink is on the left and the 1/2 sink on the right.
 
Joined
9 Apr 2010
Messages
14,246
Reaction score
2,416
Location
Hertfordshire
Country
United Kingdom
Empty both sinks and traps then remove the access point to the bottom left and clear from there.

Andy
 
Sponsored Links
Joined
3 Feb 2008
Messages
7,843
Reaction score
1,979
Location
Northamptonshire
Country
United Kingdom
In fairness whoever installed that did a pretty good job in my book. I'd do as Andy has said, then poke a curtain wire or snake along the pipe from the 1/2 bowl end, until you see it emerge at the Tee. This will ascertain that section is clear.
 
Joined
1 Mar 2020
Messages
5
Reaction score
1
Country
United Kingdom
Thanks Andy and Hugh, I will give this a go tomorrow.
I haven't ever removed that pipe access cover to the left, do they typically just screw off? It seems quite stiff and I wouldn't want to force it and break it!
Thanks, Dan
 

CBW

Joined
26 Sep 2019
Messages
12,799
Reaction score
3,835
Location
North
Country
United Kingdom
Have you tried just plunging with a sink plunger? If you’re not comfortable with the access cap, try removing the trap which the 1/2 bowl connects to and go from the wastepipe to elbow and down with a auger type drain snake.
 
Joined
3 Feb 2008
Messages
7,843
Reaction score
1,979
Location
Northamptonshire
Country
United Kingdom
Some hot water down the sink first may make it a little easier to undo, if you're still unsure, dont force it. To be honest, if you can get a snake along from the trap (offer it up externally first to gauge how far you need to go to get through to the tee), then that should prove the pipe is clear, (or at least has a hole big enough for the snake to go through), boiling water and soda crystals may then finish the job.

Avoid using chemicals, they can melt the pipework as well as any blockage, and if they dont clear it, they will also melt flesh and tissue of the poor sod who then has to take the pipework apart...
 
Joined
11 Jan 2013
Messages
5,467
Reaction score
1,181
Location
Durham
Country
United Kingdom
That leg of solvent-welded from the 1/2 sink is very near flat- good odds there's a blockage in there, people tend to chuck all sorts of odds and ends into the halfsink when they're washing up (coffee grounds, food scraps, that sort of thing). Treat as Hugh & Andy's posts
 
Joined
1 Mar 2020
Messages
5
Reaction score
1
Country
United Kingdom
Thanks for all the tips guys. I have used a plunger yes, for a long time, and also tried soda crystals. Today I will proceed by:

1)Buying a drain snake.
2)Pushing it through the 1/2 sink plug hole and seeing how far it goes.
3)If that doesn't work, remove the access point and use the drain snake from there.

Will update tonight / tomorrow :)
 
Joined
3 Feb 2008
Messages
7,843
Reaction score
1,979
Location
Northamptonshire
Country
United Kingdom
If the 1/2 bowl trap is clear, and the full bowl drains without issue, the problem can only be in the run from the 1/2 bowl to the tee. Possibly full of FOG, (fat, oil or grease), in which case if you can make a hole through it with the snake, the hot water and soda trick down the 1/2 bowl should help remove the rest. Just make sure it doesn't congeal further down the system.....
 
Joined
1 Mar 2020
Messages
5
Reaction score
1
Country
United Kingdom
UPDATE
Thanks for all your advice..
I used the drain snake on the pipework for the 1/2 sink starting further on down from the u bend... - definitely came across some fatberg type thing in the vertical pipe.
I seem to have dislodged that enough.
I then took off the access cap and ran the drain snake through there - seemed to find another blockage or fatberg type thing further down. I was a bit worried I pushed this down further rather than breaking it up.

I've run hot water and soda crystals down both sink holes and both are running fine. Hopefully this is resolved. Although, the 1/2 sink drains quickly, it gurgles at the end which might mean something is still blocked a little somewhere.

It seems fairly fixed though, can't thank you all enough! A £12 drain snake saved me the headache of arranging, being around for and paying a plumber.
 

CBW

Joined
26 Sep 2019
Messages
12,799
Reaction score
3,835
Location
North
Country
United Kingdom
Thanks for the feedback, glad we could help. Well done as well for being able to sort out, seen some plumbers run a mile because they don't want to get dirty or can't cope with the smell.
 

DIYnot Local

Staff member

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

 
Sponsored Links
Top