I've not stuck my head in the sewer to see if it works, but we have been using it once a year for 3 years now and haven't had any problems. Pipes seem to be flowing smooth and not backing up and plan on continuing to use this stuff to keep it that way!

We were having issues with our sewer as well as several neighbors. My neighbor Vickie told me the guy who fixed her sewer issue recommended she use this every 6 months and she has not had a problem in a couple years. I used weekly for about 6 weeks and have not had any further issues in about 4 months. Saved me a lot of $$

The seller was honorable and the product was received as advertised. We have been using it for a year, as a preventative measure from the trees in our yard. Our septic still works great. As for roots, we do not have any evidence whether this works or not, due to the fact that we cannot see underground.

I would recommend anyone who has a septic system surrounded by trees or bushes to-use this product … before this my septic was continually backing up and not flushing properly… when I used this it was like overnight my toilet stopped backing up… so about every three to six months I add a cup of this to my septic system it keeps the tree roots out!

Just had septic pumped; lotta roots in tank, under cement cover. Company says leach field ok, but go to 6 months. Had been using every December, for years.

its good

Value for the moneyEasy to useI was told I needed lateral linesI began putting it in thru the toiletIt has opened the lines upI have put it in every month for about 2 1/2 years and no more problems

This copper root killer works!Back story: I have an acre of land with large trees and lots of plants/vines and the Roebic septic and leech field products have been great in maintaining my septic system for years. I have a basement with a sump hole, a French drain system that runs around the perimeter, and two floor drain holes. Roots grew into the perimeter pipes and the one that leads to the furthest floor drain from the sump hole, causing my basement to flood a few years ago ... right next to the HVAC system and water heater!! After I wasn't able to fix the problem myself, it cost me a few hundred for a plumber to use a large electric auger to cut through and pull out some roots (and he was barely able to do it). A tremendous amount of water flooded into that hole, once he pulled out some roots. This root killer takes time to work, so if you're dealing with a flooded basement and need to higher a plumber first, I highly suggest getting a second sump pump to which you can attach a hose long enough to exhaust the water out of your house; if I hadn't done this, that extra water would have flooded my basement by my sump hole when the roots were cut.After that, I made sure I used root killers as maintenance. I tried a different brand for the next couple years - water kept running through the sump pipes all year long and the water level in the furthest floor drain remained just below floor level.Since this past winter, I noticed the water level in the drain intermittently rising and dropping. In February, poured a bottle of the Roebic foaming non-copper version in my toilet and didn't notice any difference in the floor drain. About a couple weeks later, I poured a bottle of Roebic K-77 (copper version) into my toilet and a few tablespoons into the basement floor drain - still no difference in the water level and water continously ran through the sump pipes. (The plumber had cut only enough roots to let the water rush out and unflood my basement.)With the extra rainfall this spring and summer, I've kept an eye on my floor drain and noticed the water rising above the drain again and some wet areas around the perimeter of my basement towards the backyard. After reading up on the effects of copper on roots, I purchased two more of the Roebic K-77 copper root killer and poured a bottle into my toilet in early June; still no difference the the water level of the floor drain. About a month later, I poured the second K-77 bottle into the toilet, minus a few tablespoons, which I poured directly into the basement drain hole. About 2 weeks later, the water in the floor drain receded. The water in the floor drain has continued to recede; it's been a month since the last bottle and I can't see any water in the drain, the perimeter of my basement is dry again, and no water runs through the sump hole pipes unless it rains or I'm doing laundry. I have a backup sump pump installed, but I've gone to the basement several times to check on the regular pump because it barely runs! The combination of the 2 bottles of K-77 in the toilet and the few tablespoons in the floor drain worked to kill the roots that have been causing water to back up in my basement drain system!

Finally found that I had roots in my sewer line. Since buying our home in 2010 our master bath and toilet would always drain slowly however the last 6 months I've hired plumber that cleared the blockage but didn't mention what cause was. Usually there's evidence left on the cutting tip. A couple months later another backup so I went to Lowes and purchased a hand or drill drive auger plus a couple of wax rings for reattaching the commode.Felt an obstruction about 10 ft in then after a minute with the auger I could hear it flow. When we pulled out the auger there were very fine roots at the spiral tip, grape vine roots to be exact. I didn't realize they could travel 7 ft under my slab foundation but they did. Now that the line is cleared I need something to stop the growth.Plan B: Buy root killerBought this stuff because of all the positive feedback. Only used half the bottle - poured it onto a paper plate to avoid water splashing into the bottle and ruining the remaining product. Also, poured it in the same time I flushed. Waited 12 hours and after the first flush noticed how quickly water was draining, including the bath tub, as if the water was being sucked out. Into week 4 and no evidence or problems like before, when water would start draining slower, after only 2 weeks.****UPDATE JULY 10, 2014****Month 3, water backing up in tub, toilet making gurgling noises, ordering another bottle then once the line is clear and dry I'm having the line camera inspected. Will report back later...****UPDATE JULY 19, 2014****Minus one star.... Poured in the entire second bottle, waited overnight and no change, as in water backing up in the tub while showering, toilet gurgling. Will try another product this week. I'll try the "foaming" one. Will update later.***Final Update November 2014 - No roots however***I did have another clog but it was from natural causes. After I ran the auger to clear the line I called a plumber to perform a camera inspection. Turns out all we have is a tight turn after the "sanitary tee" which then heads towards the laundry room then out towards the main. Someone's been flushing way too much TP plus having "highly efficient - 1.6 gal toilets" in a house built in the 50's does not help with the flow. We almost have to treat the system as if we had septic - which is what the house was originally designed for.Bottom line here would be if you have a reoccurring problem have a camera inspection performed. It tells you everything, including what steps are needed to either prevent or fix the problem permanently. K-77 did remove and has prevented root growth but it is not a permanent solution.