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.
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!
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.
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!
Had similar issues replacing faucets on pedestal sinks. If you don't
have to remove much material from the new washer...go for it.
If you need to remove a substantial amount of the washer consider
getting a thicker thicker washer & modify it.
The basin system works now, I would suggest not messing with it.
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