Just an old 2-basin kitchen sink. We ripped the old copper drainpipe out
maybe 4 years ago, installed ~ 5' of pvc.

Drain runs slow. Works, but obviously only 2/3 of capacity. I start
with bakg soda and vinegar, then some crystal Drano, then the pot of
boiling water, then the plunger. No noticable effect.

Any ideas?

TIA,
P

"Law Without Equity Is No Law At All. It Is A Form Of Jungle Rule."