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Request advice re. problem with undermount vanity basin

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Request advice re. problem with undermount vanity basin PE 01-27-2007
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Posted by PE on January 27, 2007, 2:35 am


Hi all: Request advice re. problem I've encountered while replacing faucet
in bathroom vanity. The valves and spout are mounted in the countertop, and
the basin in front of them is an undermount variety. I removed the basin
for easy access to the faucet hardware, but when replacing the basin after
installing the new fixtures, I discovered that the rubber/metal washer
that's under the counter and at the base of the new spout apparently has a
larger diameter than the one it replaced, and it prevents the flange around
the top of the undermount basin from snugging up against the underside of
the counter. There's insufficient space to move the basin forward, so the
only option would seem to be, if possible, to remove a semi-circle of
material approx. 2" across and 1" deep from the basin flange in order for
the same to be able to clear the spout washer. Would appreciate any advice
whether it's possible to do so without cracking/ruining the basin and, if
so, best method and tool(s) to use. Also any ideas for alternative
work-around. Would like to keep the new hardware if I can and would rather
not buy a new basin. Thanks for your replies!



Posted by Berkshire Bill on January 27, 2007, 7:19 am



> Hi all: Request advice re. problem I've encountered while replacing
> faucet
> in bathroom vanity. The valves and spout are mounted in the countertop,
> and
> the basin in front of them is an undermount variety. I removed the basin
> for easy access to the faucet hardware, but when replacing the basin after
> installing the new fixtures, I discovered that the rubber/metal washer
> that's under the counter and at the base of the new spout apparently has a
> larger diameter than the one it replaced, and it prevents the flange
> around
> the top of the undermount basin from snugging up against the underside of
> the counter. There's insufficient space to move the basin forward, so the
> only option would seem to be, if possible, to remove a semi-circle of
> material approx. 2" across and 1" deep from the basin flange in order for
> the same to be able to clear the spout washer. Would appreciate any
> advice
> whether it's possible to do so without cracking/ruining the basin and, if
> so, best method and tool(s) to use. Also any ideas for alternative
> work-around. Would like to keep the new hardware if I can and would
> rather
> not buy a new basin. Thanks for your replies!
>
>

It's probably better to use the old mounting washers against the new
fixture. Or you could grind or nibble a section off the new mounting
washer. I would be a little cautious about modifying the mounting ring for
the lavatory. Any cutting or grinding is asking for deformity and a poor
fit, and those flanges are not easy to find.

Happy modeming,
Bill



Posted by PE on January 27, 2007, 12:49 pm


The old mounting hardware was so badly corroded that I had to cut it off in
order to remove the old fixture. But I share your concern about the basin,
and may give your second suggestion a try. Thanks!

>
> > Hi all: Request advice re. problem I've encountered while replacing
> > faucet
> > in bathroom vanity. The valves and spout are mounted in the countertop,
> > and
> > the basin in front of them is an undermount variety. I removed the
basin
> > for easy access to the faucet hardware, but when replacing the basin
after
> > installing the new fixtures, I discovered that the rubber/metal washer
> > that's under the counter and at the base of the new spout apparently has
a
> > larger diameter than the one it replaced, and it prevents the flange
> > around
> > the top of the undermount basin from snugging up against the underside
of
> > the counter. There's insufficient space to move the basin forward, so
the
> > only option would seem to be, if possible, to remove a semi-circle of
> > material approx. 2" across and 1" deep from the basin flange in order
for
> > the same to be able to clear the spout washer. Would appreciate any
> > advice
> > whether it's possible to do so without cracking/ruining the basin and,
if
> > so, best method and tool(s) to use. Also any ideas for alternative
> > work-around. Would like to keep the new hardware if I can and would
> > rather
> > not buy a new basin. Thanks for your replies!
> >
> >
>
> It's probably better to use the old mounting washers against the new
> fixture. Or you could grind or nibble a section off the new mounting
> washer. I would be a little cautious about modifying the mounting ring
for
> the lavatory. Any cutting or grinding is asking for deformity and a poor
> fit, and those flanges are not easy to find.
>
> Happy modeming,
> Bill
>
>



Posted by Joe on January 27, 2007, 12:56 pm




> Hi all: Request advice re. problem I've encountered while replacing faucet
> in bathroom vanity. The valves and spout are mounted in the countertop, and
> the basin in front of them is an undermount variety. I removed the basin
> for easy access to the faucet hardware, but when replacing the basin after
> installing the new fixtures, I discovered that the rubber/metal washer
> that's under the counter and at the base of the new spout apparently has a
> larger diameter than the one it replaced, and it prevents the flange around
> the top of the undermount basin from snugging up against the underside of
> the counter. There's insufficient space to move the basin forward, so the
> only option would seem to be, if possible, to remove a semi-circle of
> material approx. 2" across and 1" deep from the basin flange in order for
> the same to be able to clear the spout washer. Would appreciate any advice
> whether it's possible to do so without cracking/ruining the basin and, if
> so, best method and tool(s) to use. Also any ideas for alternative
> work-around. Would like to keep the new hardware if I can and would rather
> not buy a new basin. Thanks for your replies!

Just curious...wouldn't it be easier to complete your project if you
removed the entire countertop and re-engineered the installation with
better fitting harware? That is a common practice in plumbing work.
HTH

Joe


Posted by PE on January 27, 2007, 7:37 pm


I guess it depends on how you define "easier"!! :), although a variation on
your suggestion did solve the problem. I enlarged the existing spout
mounting hole in the counter by grinding out about 1/3" of material on it's
rear side, thus enabling the spout to be mounted far-enough back and away
from the basin so that the basin's flange now cleared the spout's
undercounter mounting hardware. The resulting, enlarged spout mounting hole
in the counter was still small enough to be entirely covered by the new
spout's decorative countertop flange. Thanks for putting me on to the idea!


>
>
> > Hi all: Request advice re. problem I've encountered while replacing
faucet
> > in bathroom vanity. The valves and spout are mounted in the countertop,
and
> > the basin in front of them is an undermount variety. I removed the
basin
> > for easy access to the faucet hardware, but when replacing the basin
after
> > installing the new fixtures, I discovered that the rubber/metal washer
> > that's under the counter and at the base of the new spout apparently has
a
> > larger diameter than the one it replaced, and it prevents the flange
around
> > the top of the undermount basin from snugging up against the underside
of
> > the counter. There's insufficient space to move the basin forward, so
the
> > only option would seem to be, if possible, to remove a semi-circle of
> > material approx. 2" across and 1" deep from the basin flange in order
for
> > the same to be able to clear the spout washer. Would appreciate any
advice
> > whether it's possible to do so without cracking/ruining the basin and,
if
> > so, best method and tool(s) to use. Also any ideas for alternative
> > work-around. Would like to keep the new hardware if I can and would
rather
> > not buy a new basin. Thanks for your replies!
>
> Just curious...wouldn't it be easier to complete your project if you
> removed the entire countertop and re-engineered the installation with
> better fitting harware? That is a common practice in plumbing work.
> HTH
>
> Joe
>



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