You can find websites with that information, but what you really need
to know is that the hardest part of this job is removing the retaining
ring from the drain. You can buy special wrenches to fit the large
ring. But the problem is that once you apply torque to the ring, the
whole drain usually starts turning.

If you want to save yourself a LOT of time and aggravation, but a
whole new drain assembly (about $15) and a small container of
plumber's putty. Cut the old ring off with either a hacksaw or dremel
tool with a cutting wheel. Once the ring is off, you can remove the
whole drain assembly. It's not the gasket that's causing your leaking
problem. It's deteriorated plumber's putty around the flange of the
sink.

Remove the old drain. Clean off all the old putty. Apply a generous
bead of new putty. Then follow the directions packaged with the new
drain. Just remember that the cardboard gasket goes on last. It's
there to prevent the metal retaining ring from sticking to the rubber
gasket above it.


On Thu, 4 Dec 2008 08:04:47 -0800 (PST), wrote:

Anyone know of a website showing detailed step by step instructions to
guide someone with zero knowledge about this stuff on how to replace
the large sink-drain gasket that butts up against the bottom of a
kitchen sink? Water is leaking around the gasket which is warped and
separating from the bottom of the sink.

Thanks.