Quote Originally Posted by Skink
Kitchen or bath sink??? if the Kitchen it is prob grease if it is still going down but slow,,, Get a gallon of white vinegar... every couple days boil 2 big pots of water put one cup of vinigar in each pot and pour it down the drain boiling hot as you can get it... when it gets better do 1 pot like every 3/4 months to maintain...

bathroom is prob hair,,, you need to go to Home Depot and get acid,,, "Clobber" is the brand here,,,they may not have that but,,, should have some sort of professional strength acid in a quart bottle... you may have go to a plumbing supply,,,they may not give it to you without a plumbing license but,,, usually if one place don't another will,,,so just call and ask if they carry Clobber in a quart,,, ask the price and say I will be down to get it,,,if they're strict they will ask if you are a plumber,,,if not they will prob ask no questions...

OK,,,at night when you know you wont be using the drain again till the next day pour a cup of Clobber down the drain and flush with water the next day... do this 4 times till the quart is done or if the drain if running fine stop...

If you go with a supermarket brand,,,get liquid,,,No crystals and just follow what I have...

I would like to know if you are in an old place or new??? are the drain pipes all metal or plastic???

Or he could go under the bathroom sink with a wrench and take the pipes apart and blast them and get the guck out. Rod the top and the pipes if needed.