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Old 03-31-2013, 01:02 PM   #1
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Old metal waste line to PVC issues


This new sink/vanity has been a massive headache this weekend for me. First my wife who bought the vanity and sink failed to notice that our floor board trim would obstruct the vanity from going flush to the wall. So I had to terribly improvise a 30" 2x4 to fill in the gap (this is all a 2 year solution till we redo our bathrooms).

Anyways I am now running into an issue with the P-trap. I have old steel coming in, into PVC. I dreaded disconnecting the rear part of the P-trap knowing that it could cause havoc and it has. The pipe end itself is not smooth, it has some rough jagged edges around the end. I tried both a rubber washer and plastic washer (1.25") but the end still leaks. I think a 1.5" washer would be too big.

I am afraid that my next step would have to be to cut the bend, and close to the wall as possible, put in a Fernco coupler, and hope for the best. My fear is if the metal pipe cracks in any sort of way I am totally screwed.

Thoughts?


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Old 03-31-2013, 01:20 PM   #2
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Old metal waste line to PVC issues


That pipe needs to be replaced with a new piece of PVC.
It should have been included with the drain kit.
What happened to the nut and seal that seals it to the nipple coming out of the wall?
You need an ossilating saw to cut that baseboard so the vanity will fit.
About a 10 min. job with the right tool.


Last edited by joecaption; 03-31-2013 at 01:23 PM.
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Old 03-31-2013, 01:27 PM   #3
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Old metal waste line to PVC issues


The drain kit did not come with a new PVC pipe for the wall. Just the down pipe which I joined to the extender (white PVC pipe in the picture). I did buy a P-trap kit from HD that has a replacement line from the wall, but it's not like this house from 1930 has PVC in the walls, so it's finding the best method to join at this point.

And I do not have an oscillating saw, thus my work around. :/
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Old 03-31-2013, 01:33 PM   #4
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Old metal waste line to PVC issues


That kit should still work. That old steel pipe and the PVC are the same size.
There should have been two differant seals that go under that nut. One is 1-1/2 and the other one adapts from 1-1/4 to the size of that pipe in the wall.
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Old 03-31-2013, 01:37 PM   #5
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Old metal waste line to PVC issues


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Originally Posted by joecaption View Post
That kit should still work. That old steel pipe and the PVC are the same size.
There should have been two differant seals that go under that nut. One is 1-1/2 and the other one adapts from 1-1/4 to the size of that pipe in the wall.
The problem is none of the washers are meeting up right to the metal/galvanized pipe from the wall. I can get things hooked up (metal P-trap pipe or PVC) however it leaks from the rear metal joint.
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Old 03-31-2013, 02:09 PM   #6
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Old metal waste line to PVC issues


That one should be a flat rubber washer.
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Old 03-31-2013, 02:10 PM   #7
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Old metal waste line to PVC issues


you are way overthinking this.....pull crome eschen away from wall remove slip nut that holds arm comming out of wall with new arm and j bend...ben sr ....................do this unless its soldered in ...
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Old 03-31-2013, 02:25 PM   #8
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Old metal waste line to PVC issues


At some point all that old metal supply and drain piping is all going to need to be replaced. It's 100% of the time at some point is going to rust out and leak from the inside out.
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Old 03-31-2013, 02:30 PM   #9
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Old metal waste line to PVC issues


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At some point all that old metal supply and drain piping is all going to need to be replaced. It's 100% of the time at some point is going to rust out and leak from the inside out.
Oh no doubt. The hope is for things to last to 2015 when we have the funds to do both of our bathrooms (which may include turning two baths into one). This was a stop gap solution of pulling out a horrible sink, but then of course running into the perils of having an old house.
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Old 03-31-2013, 02:54 PM   #10
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Old metal waste line to PVC issues


Only thing that works in an old house is the owner.
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Old 03-31-2013, 03:41 PM   #11
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Old metal waste line to PVC issues


It is not unusual at all to have to plumb cut base molding to install a vanity flush to the wall. A Multi-tool is excellent for this.

What you have sticking out there is the back portion of a P trap. I would pull that out, Take off the escutcheon, and see what you have. It is probable that you have Galvanized Steel Piping in the walls, and it is probable that it is mostly blocked from scum and internal corrosion.

AT minimum, you are going to want to run a closet auger into that pipe while you have it apart.
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Old 04-01-2013, 07:48 AM   #12
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Old metal waste line to PVC issues


I would just cut the base molding to make it fit. However I have a two-fold problem. First the bottom structural integrity of the vanity is supported by a bottom back piece that is smaller than my wood trim is. Plus I can't relocate the piece because it would obstruct the piping coming in from the wall.

The alternative, knocking out the base trim, I am lacking the tools to do a clean job of it. At this point my very ugly compromise (2x4) works and I can do some tiling over it to make it look descent. Still just a PITA.

The more pressing issue at hand, my waste pipe. It does seem to be a galvanized piece, and I am not sure if it's just years of decay, but I swear it look like someone fused the pipe on.



I have tried to remove the pipe with absolutely no success. I am also afraid that if I do remove it that it may mess up the threading into the wall pipe and make things far more difficult. I am going to try to find a slightly over-sized washer so I don't have to mess with the steel pipe for now (at some point in 2015 the plan is to have all my existing bathroom piping replaced). If that does not work the only other thing I can think of is trim the steel pipe and put on a coupler. I am sure if it is galvanized that it will be so much fun to try to trim. :/
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Old 04-01-2013, 07:56 AM   #13
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Old metal waste line to PVC issues


Someone soldered that one in place.
To get that one out in one piece it's going to have to be heated.
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Old 04-01-2013, 07:57 AM   #14
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Old metal waste line to PVC issues


I thought that, but then I was thinking "who would solder a pipe on". Sigh. Too much fun.
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Old 04-01-2013, 08:10 AM   #15
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Old metal waste line to PVC issues


Welcome to the reality of working on old houses with "charm".

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