It's possible that sink has its own line going to the main city line. I have one kitchen sink in a basement that does that. But I think that is pretty unusual. How far away is the nearest other plumbing fixture like a toilet, shower, or tub?
Can you see any drain lines the basement, particularly where the main drain leaves the house?

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

There's a half bath about 30 feet away and laundry plumbing about as far away.

I have no way to view what's going on under the slab. Unless... I have a Bluetooth GPS receiver that's idle...

Sixto

My general rule of thumb is that I don't call a plumber until I'm sure I've run my snake from the fixture down into the main line. If the nearest toilet is 30' away, there's a good chance your 25' snake has not made it to the main line. You can rent snakes at Home Depot. Don't know if they rent a small one more than 25'. It might be worth it depending on your local snaking charges. Around here, a snake out of a branch line by a plumber will run about $150.

What does your snake look like when you pull it back? Is it all black and gooey or pretty clean? Does it have anything stuck on the end?

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

The first couple of times it came back gooey and had some fibers thicker than hair. After that it was pretty clean. Not much improvement in flow.

I could check the rental yard tomorrow...

Sixto
87 300D

That's an indication you pushed the plug down the line but probably not out into the main line.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

A 50 foot 1/2" auger did it. It being punching a hole through the muck. Nothing came back with the auger except a coating of grease. I'll follow up with more chemicals tonight and read up on proper cleaning of the lines.

Thanks for all the help!

Sixto
87 300D

Good work. It's quite possible that it was just plugged with gooey slime. I'd run straight hot water down that line for about 5 minutes once a month or so to flush out the slime.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

I would also run some of that bleach/lye mixture through with hot water at the same time. I think Home Depot sells something to keep slow drains open, probably less concentrated than the fast acting stuff (which, by the way, opens a very slow drain in 10 minutes, usually on the first try.) My wife puts a lot of hair down her drain and it clogs periodically... good luck

__________________
Bob Roe
Lehigh Valley PA USA
1973 Olds 88, 1972 MB 280SE, 1978 Datsun 280Z, 1971 Ford T-Bird, 1972 Olds 88, 1983 Nissan Sentra, 1985 Sentra, 1973 230.6, 1990 Acura Integra, 1991 Volvo 940GLE wagon, 1983 300SD, 1984 300SD, 1995 Subaru Legacy L wagon, 2002 Mountaineer, 1991 300TE wagon, 2008 Murano, 2007 R320CDI 4Matic 52K, some Hyundai, 2008 BMW 535xi wagon, all gone... currently
2007 Honda Odyssey Touring, 2014 E350 4matic

Currently i also facing this problem with my home kitchen sink.This information will be helpful for me....thanks everyone.

__________________
Kitchen Cabinetry