Sonja Mairenn. Sink. July 30th , 2017.
With a pedestal wash basin, a common dodge is to cross the supply pipes over behind the pedestal - the pipes stay relatively well hidden, and there are not too many tight bends in the pipes.
Plumbing pipes can usually be manipulated so that they end up exactly where they are wanted. But waste pipes are less amenable often their slope and position are fairly fixed. So ensure that your proposed position for the new sink or basin enables the waste to be connected properly. You can gel 'kits' of waste fittings for sinks, basins and baths; a length of flexible waste pipe will often be useful as will lengths of hand-bendable copper pipe.
However, if your sink is separate from the vanity top, install the countertop first, then the faucets and then put the sink into the countertop.
Turn off the water by closing the angle stops under the sink. By turning off one side at a time, you will be able to determine which one leaks, but I always just replace them both.
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