Rated 3.3 out of 5 by 39
Rated 1.0 out of 5.0 by drnano Worthless
Liquid in the kitchen sink would drain slowly over night, but would fill up when the water was turned on.
After pouring the entire jug down the kitchen sink drain over two days and waiting yet another day, it never cleared the clog.
A big waste of time and money.
May 12, 2016
Rated 4.0 out of 5.0 by Nusscular Works on Hair and Soap Scum
This is an Alkaline based drain cleaner (Bleach and Lye) which works well especially on sinks or shower drains which are clogged by hair and soap scum. This tends to be cheaper than other fancier foaming brands but I find it works just as well.
The only other product I have used which worked better was some dry pellet form drain cleaner which I used in the middle east. It literally smoked and boiled in the pipes. Not sure if you can legally buy that in the US but it may be worth a shot if this product does not work for you.
July 21, 2013
Rated 5.0 out of 5.0 by Boxcar It worked - for me
Bottom line: it worked well for me, unlike negative view of some.
Detail: Apartment in 50 year old high rise. Bathroom sink with 12 foot horizontal run with presumably slight grade to vertical soil pipe. Very slow draining with little or no help from plunging. Instructions: "16 ounces" . I applied 32 ounces to get plenty of cleaner past trap under sink and let sit overnight. Vast improvement. Following night for insurance: 48 ounces. Still draining perfectly after 2 weeks! Bonus: Gallon ( 128 ounces) under $10.00 at Home Depot - maybe cheapest of about a dozen products. Different reviews (and results) may be due to differences in composition of the clogs. I have no idea what mine was.
September 28, 2014
Rated 1.0 out of 5.0 by Bill Waste of money and time
Sent wife to Home Depot to get Industrial strength Drano, store clerk highly recommend this junk, did not work after 24 hours.
April 12, 2015
Rated 5.0 out of 5.0 by Boxcar Buy it: Effective and cheap.
Our Problem: In 60 year old bldg low draining of bathroom basin that has ~8 foot lateral pipe with low gradient to vertical drop. Other cures ( chemicals, plunger ) only partial successful and didn't last long. Bought this item 4 months ago. Used double quantity (32 ounces) . It worked! Two weeks drain slowing up again, repeated with 32 ounces; Working fine. At $2.50 per treatment it's cheap & effective.
January 24, 2015
Rated 5.0 out of 5.0 by Chick Worked Great
Bathroom sink was draining very, very slowly. Tried a lot of other liquid drain cleaning products in the past and always had to get a plumber to snake it out. Instructions call for 16 ounces, but I used about 32 to make sure it got further down the pipe. Waited about 15 minutes and then ran hot water. Significant improvement. Repeated the process and the drain seemed to be normal.
January 27, 2015
Rated 2.0 out of 5.0 by andersna75 Vinegar worked better when it mattered most
I've used this de-clogger on sinks with minor backup and it worked ok. But I had a shower that had lots of hardwater buildup and probably regular gunk too that was draining very slowly. After several treatments of the Zep, no change.
So I tried a half gallon of cheap vinegar followed by boiling water, cleared the problem right up. And at least the much cheaper vinegar that's left over has many other uses. Why use an expensive industrial strength chemcial when a cheap, naturally occuring chemical works better?
July 13, 2013
Rated 1.0 out of 5.0 by Jack didn't work at my house
Used it according to instructions...several times. No use. Have had good luck with other ZEP products so this was a disappointment. I'll try LIQUID PLUMBER as other reviewer did and see if that will keep me from calling plumber.
August 13, 2014