I am replacing our old bathroom vanity with a new very expensive one.
Our piping is coming up through the floor, water supply, and drain.
When I installed the old unit I just cut an opening on the floor of the
cabinet in order to
have access to the area below and allow space for installation of the pipes
to the sink above.
Since the new unit is rather pricey, I am wondering if you have any
as to how I can install this and keep the inside bottom of the vanity
On the old unit I cut a square and fit a piece of material with cut outs for
The piping coming out of the wall is not an option, so it will need to be
cut under neath again.
I am thinking of saving the piece I cut out and someway supporting it with
brackets or clamps after
cutouts are made..
In all probability I will do this exactly as the first was done, however I
am seeking some food for thought..
You may want to reconsider that option. Your plumbing code may not
allow that any more. The practical reason for that is that venting is
required near the drain.
In many older houses the through the floor drained sinks were
installed sans vents because of cost and often ignorance. Getting the
piping into the wall is seldom an impossibility nor beyond the
capabilities of a DIYer with reasonable skills.
Your concern over messing up the bottom of the vanity is reasonable,
and considering the price of the unit, a bottom piping system would
look quite tacky.
Wall accessed lines and drain will be far easier to work with once
installed, plus keeping the elegance in the project.
Make sure the wall behind the vanity is dead straight. Some DIY errors
are having to use a sealant or filler to cover a gap with a crooked
wall and installing faucets after the sink is installed. Pros do this
because the results are better and they make better money with less
Why not just cut openings for the pipes in the floor directly, using a
piece of paper that you measure and mark as a template. Or, copy the
holes in the existing vanity onto a piece of paper and use that as
your pattern for cutting holes in the new vanity bottom. You should
be able to do this within a 1/4 inch of perfect, then caulk around the
pipes when you are done. THis is too simple to make it into such a
When I stated (NOT AN OPTION) I surely meant that, due to construction below
it just wont work, of course I could remove the entire wall, floor, and
support beams under neath, however due to recently having all 4" cast iron
drains replaced with ABS, along with the 1-1/4" copper tubing drains..in no
way am I about to make changes like you suggest...
but thanks anyway
I could do that rather easily, however since there is already an opening I
would like to keep a visual option below just by chance a leak would
develop. If I do what you propose I would need to lower the vanity onto the
pipes and not have the visual option., as I mentioned I am still considering
using what I cutout to do what you suggest, with the option of being able to
remove it with ease...
The only other thing to do is to put right-angle fittings on the pipes
right where they come thru the floor and route them to the back behind
the vanity, then another set of right-angle bends and then run them
upwards to whatever height you need to bring them into the vanity.
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