Plumbing question

BanziBarn · 05-20-2013, 01:01 PM

Hi Guys,

I noticed today that the sink waste pipe coming out of the wall of my house was not as flush to the wall as normal.

I was able to push it back in but that made me curious as to why I was able to move it. When I look under my sink there is no way that the waste pipe can move because it's connected to the U bend.

Therefore, there must be a join of two pipes in the wall - I presume the external pipe is bigger than the one coming from the sink, with the smaller one sitting inside the bigger one.....

So, my question is, should these two pipes be more securely connected or is is OK for the waste from the sink to simply be sitting inside the external pipe as long as there is enough of an overlap and a slight slope?

The wall has had a history of damp, which I thought was something else, but this has made me wonder!

Sorry, know nothing about plumbing!

Thanks in advance.

gaza01 · 05-20-2013, 01:46 PM

Should all really be sealed but im not sure i understand you. Can you post a pic of it?

BanziBarn · 05-20-2013, 01:52 PM

Basically the outside part of the pipe moves in and out but nothing moves under the sink so it can't be a single length of pipe going through the wall.

gaza01 · 05-20-2013, 01:59 PM

Ok i get you know. Not sure if it meets regulations or not but provided the water isnt backing up then its ok. My choice would be to have it all sealed up though. To test it...fill the sink up then pull the plug and get yr head under there to see if any water is leaking out. If it is then get it seen to.

BanziBarn · 05-20-2013, 02:51 PM

OK cool. No, there is no visible leaking so it's probably ok. I was just a bit worried about small amounts coming out and leaking into the wall.

Thanks for your reply.

gaza01 · 05-20-2013, 03:12 PM

No worries. Just keep an eye on it. Waste pipe comes in varying sizes from 40mm diameter down to about 32 i think. Maybe the newer installation didnt match the previous hence yr pipe in pipe situation

john-vfr · 05-20-2013, 03:48 PM

You said the wall has history of damp...get it checked out .It should not be two pieces of pipe with a join in the cavity of the wall!!!!

Squintstream · 05-20-2013, 05:08 PM

It should be relatively simple to switch it for a one piece pipe and put your mind at rest.

I'd go down that route rather than just leaving it (especially with the history of damp).

Good luck mate...

willhollin · 05-20-2013, 05:58 PM

Is it connected straight into the soil stack?

BanziBarn · 05-21-2013, 01:20 AM

Nope, out the wall and then straight into the gutter drain.....

BanziBarn · 05-21-2013, 01:21 AM

Quote:

Originally Posted by john-vfr

You said the wall has history of damp...get it checked out .It should not be two pieces of pipe with a join in the cavity of the wall!!!!

OK, Yeah, think I will.... Thanks.

John320d · 05-21-2013, 04:40 AM

no one seems to have mentioned these are push-on fittings . I take it as the pipe comes through the wall that it enters a 90deg. elbow. I would suggest that you are either pushing the outside elbow back onto the pipe, or internally the pipe is slipping back into the U bend.

05-20-2013, 01:01 PM	#1
BanziBarn Lieutenant Colonel 106 Rep 1,800 Posts Drives: BMW 330D E90 LCI Msport Join Date: Sep 2009 Location: London iTrader: (0)	Plumbing question - kitchen sink Hi Guys, I noticed today that the sink waste pipe coming out of the wall of my house was not as flush to the wall as normal. I was able to push it back in but that made me curious as to why I was able to move it. When I look under my sink there is no way that the waste pipe can move because it's connected to the U bend. Therefore, there must be a join of two pipes in the wall - I presume the external pipe is bigger than the one coming from the sink, with the smaller one sitting inside the bigger one..... So, my question is, should these two pipes be more securely connected or is is OK for the waste from the sink to simply be sitting inside the external pipe as long as there is enough of an overlap and a slight slope? The wall has had a history of damp, which I thought was something else, but this has made me wonder! Sorry, know nothing about plumbing! Thanks in advance. __________________ Black 330d E90 LCI M Sport Saloon Auto. Privacy Glass, Cream Leather, 6FL, I-Drive/Nav/Bluetooth, Alpine hifi upgrade.
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05-20-2013, 01:46 PM	#2
gaza01 Colonel 105 Rep 2,692 Posts Drives: E92 335i Join Date: Dec 2010 Location: London iTrader: (3)	Should all really be sealed but im not sure i understand you. Can you post a pic of it?
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05-20-2013, 01:52 PM	#3
BanziBarn Lieutenant Colonel 106 Rep 1,800 Posts Drives: BMW 330D E90 LCI Msport Join Date: Sep 2009 Location: London iTrader: (0)	Basically the outside part of the pipe moves in and out but nothing moves under the sink so it can't be a single length of pipe going through the wall. __________________ Black 330d E90 LCI M Sport Saloon Auto. Privacy Glass, Cream Leather, 6FL, I-Drive/Nav/Bluetooth, Alpine hifi upgrade.
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05-20-2013, 01:59 PM	#4
gaza01 Colonel 105 Rep 2,692 Posts Drives: E92 335i Join Date: Dec 2010 Location: London iTrader: (3)	Ok i get you know. Not sure if it meets regulations or not but provided the water isnt backing up then its ok. My choice would be to have it all sealed up though. To test it...fill the sink up then pull the plug and get yr head under there to see if any water is leaking out. If it is then get it seen to.
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05-20-2013, 02:51 PM	#5
BanziBarn Lieutenant Colonel 106 Rep 1,800 Posts Drives: BMW 330D E90 LCI Msport Join Date: Sep 2009 Location: London iTrader: (0)	OK cool. No, there is no visible leaking so it's probably ok. I was just a bit worried about small amounts coming out and leaking into the wall. Thanks for your reply. __________________ Black 330d E90 LCI M Sport Saloon Auto. Privacy Glass, Cream Leather, 6FL, I-Drive/Nav/Bluetooth, Alpine hifi upgrade.
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05-20-2013, 03:12 PM	#6
gaza01 Colonel 105 Rep 2,692 Posts Drives: E92 335i Join Date: Dec 2010 Location: London iTrader: (3)	No worries. Just keep an eye on it. Waste pipe comes in varying sizes from 40mm diameter down to about 32 i think. Maybe the newer installation didnt match the previous hence yr pipe in pipe situation
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05-20-2013, 03:48 PM	#7
john-vfr spender of the kids inheritance 18 Rep 182 Posts Drives: 2013 BMW xdrive touring Join Date: Apr 2012 Location: Cheshire iTrader: (0)	You said the wall has history of damp...get it checked out .It should not be two pieces of pipe with a join in the cavity of the wall!!!!
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05-20-2013, 05:08 PM	#8
Squintstream Captain 141 Rep 736 Posts Drives: F32 435i M Sport Join Date: Jan 2011 Location: Derby iTrader: (14)	It should be relatively simple to switch it for a one piece pipe and put your mind at rest. I'd go down that route rather than just leaving it (especially with the history of damp). Good luck mate...
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05-20-2013, 05:58 PM	#9
willhollin Major General 268 Rep 9,915 Posts Drives: VW T5 Join Date: Apr 2008 Location: Worcestershire iTrader: (1) Garage List 2007 BMW E92 330d SE [10.00] 2010 Transporter T5 ... [0.00]	Is it connected straight into the soil stack? __________________
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05-21-2013, 01:20 AM	#10
BanziBarn Lieutenant Colonel 106 Rep 1,800 Posts Drives: BMW 330D E90 LCI Msport Join Date: Sep 2009 Location: London iTrader: (0)	Nope, out the wall and then straight into the gutter drain.....
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05-21-2013, 04:40 AM	#12
John320d Lieutenant 30 Rep 559 Posts Drives: BMW 320d E93 Join Date: Dec 2009 Location: Manchester UK iTrader: (0)	no one seems to have mentioned these are push-on fittings . I take it as the pipe comes through the wall that it enters a 90deg. elbow. I would suggest that you are either pushing the outside elbow back onto the pipe, or internally the pipe is slipping back into the U bend.
	Appreciate 0 Quote