What is the best product to keep the kitchen sink draining properly?
Also, what is the best product to open a stopped sink?
I don’t know of any reason to use any product in a kitchen sink to keep
it flowing. If it is slow draining, I would remove the trap, clean
it, and snake out the drain line after the trap.
The same process applies for a stopped-up sink. For a sink that may be
blocked with hair (bathtub, or bath sink), you can sometimes pull out
the debris with a hooked wire, or a small tool designed to stick in the
trap and pull out the debris.
I don’t ever recommend chemicals. They don’t work well. If you fill a
stopped-up trap with chemicals and it does not work. Now you have to
deal with the chemicals when you clean the trap—not a good thing.
For a kitchen sink, you could try to pour a few gallon of boiling hot
water down the drain. Some folks think this may loosen cooking grease
that may have accumulated.
Tom Feiza, Mr. Fix-It Inc.