Kitchen / bathroom wate not draining

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Hi

I have just run a new 40mm waste pipe in my flat.

It drop from the kitchen sink down to low level. Through the wall into the bathroom where it falls to the original lead waste pipe. Bath is T'd into it about 1m from the final connection.

Everything is new appart from 1ft of lead that then dissapears into the wall to the SVP. Assuming there is no blockage between my connection and the SVP which I have no reason to believe there is I am confused why the kitchen sink is not draining.

If I run the kitchen sink it seems to fill up the waste and then back up the sink with little to no water draining.

If I open a rodding point just before the final connection it gurgles and then I hear the water coming down towards me and out the r point. The pipe is not full of water when I open the rodding point so it seems like it is stuck up at the kitchen. Feels like some form of vacuum preventing the kitchen sink from draining.

Does this sound familiar and what causes it if you know.

Bath is not currently connected as I wanted to check the kitchen drained first so the T is just blanked off. So basically just a kitchen sink run as it stands
 
Does water from sink immediately start ,and continue ,to drain once the rodding point is opened ?
Is the sink newly installed ,if not did it drain ok before you fitted new waste pipe ?
Why was the waste pipe replaced ?
 
Forgot to take pics but will get some tomorrow. Lead pipe disappears into the party wall so you only see one end of it.

There was a collapsed straight joint below the bath which caused everything to back up and fail. Ripped it all out and replaced. Sink is existing but waste was new.

When I un do the rodding eye I immediately here movement and the sink drains completely and continuously.

Have done several bathrooms in the past but never had this problem.
 
Pictures below. There water runs from the sink to the last inspection point so there is no blockage. Water doesn't drain from kitchen sink unless an inspection cap is removed.
1000074548.jpg

1000074549.jpg
 
Did you take any pics of the original pipe run and the " collapsed straight joint" in particular ,it would be useful to see if you did ?
As water flows fully once air is allowed into pipework,it seems like there is a lack of venting ,fitting an air admittance valve would be worth a try.
By the way ,the two spigots on the trap under the sink should point upward,( the one not used should be blanked off,and I assume it is ). The appliance waste hose should enter at high level,and point downward into the spigot.
 
The Vp2 is ok, fit it standing vertically ,into a Tee inserted on the horizontal pipe run. Preferably in a place you can reach it in future.
There is no way to fit one onto the trap spigot.
 
Only thing I can think of, looking at that arrangement is, there is either an issue with the Lead pipe, kinked or crushed so the water is struggling to get through, or, (less likely) the stack is blocked so the discharge cannot displace enough air to find it's way into the stack.

Secondly, if planning to add a bath or shower on that run, if its not draining properly now, it's going to set you up with all manner of issues going forward. I can see each time the washing machine and/or sink discharge, the dirty water erupting back into the bath/shower.

Afraid I have to disagree with Terry, adding an AAV wont help. If the pipework is holding, but then goes when you open a rodding cap, then I suspect that's because you're letting trapped air out, the AAV will only let air in! It needs further investigation as to why the water isn't getting away, through to the stack.
 
Tried an aav it no good. Will get a plumber in to see if they can identify the problem.

I nodded through to the svp and there doesn't seem to be any blockage there
 
Certainly sounds like a blockage further downstream in the original pipework not letting the waste run - that and there is no where for the trapped air to go, so is holding back the waste water. Is the stack shared and vented to the atmosphere?

Needs the lead waste run checked and possibly rodded or traced to see where it runs, you mention you rodded to the stack, have you confirmed that by sight at the stack?

The the other point I would make is I would look to avoid having everything running down one waste pipe, especially if it is no larger that 11/2" and especially if the bathroom is all downstream of the kitchen.
 
Madrab said:
Certainly sounds like a blockage further downstream in the original pipework not letting the waste run - that and there is no where for the trapped air to go, so is holding back the waste water. Is the stack shared and vented to the atmosphere?

Needs the lead waste run checked and possibly rodded or traced to see where it runs, you mention you rodded to the stack, have you confirmed that by sight at the stack?
Click to expand...
OP You say the pipe goes into the party wall, where is your WC ? Does it connect with the SVP . I wonder if the sink/bathroom goes to a smaller stack, more easily blocked.
 
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