Instant Power® Main Line Cleaner

Clears clogs

Intended for larger drain pipes

Safe for all plumbing pipes

Our Main Line Cleaner is a non-acid formulation intended to clear main sewer lines and interior lateral/vertical lines of all obstructions.

This 1 gallon container is intended to be used in one application.

What is it used for?

This product is used to clear sewer and lateral lines

What is it not used for?

It is not used for Septic system treatment.


How much do I use? On this product it is suggested to use the entire contents for one application.


To clear sewer line clogs, add this product to the closest point between the house and sewer line.


I don't know how I can thank you. Three times now I have had a clog and it always seems to be a weekend or a holiday when calling a plumber would cost a fortune. But with no fail every time, your product (main line cleaner) has always come thru for me and has saved me a ton of money!!! Like I said, can't thank you enough!!
-Amy C.

After Roto Rooter asked for $699 to open my main line I went online. I found your product and bought two one gallon bottles. I dumped them down the main drain and waited about 20 hours, flushed it out and the drain was cleared. Thank you. ( cost less than $23.00)

I did see some reviews that indicated that it did not work and were refunded their purchase price.

What would be some reasons that the clog remains? I suspect that it is not because they did not follow directions as there really were no directions other than dumping it down the drain.
-Thomas Ragusa

I live in a house that was built in 1927. I have lived here for a year. Six months in, my main drain line plugged. So, I did the natural thing and called a service in to run a motorized drain auger to clean it out. It worked but cost around $400. But, the line was cleared and functioned properly.

Six months later, the same thing happened. I did a load of laundry and realized as the wash water emptied that the main line was blocked again.

I went online to see if there were any other options as I really didn’t want to spend another $400.
Lo and behold, I saw your main line cleaner mentioned on a couple different big box store websites. I noticed that the reviews were mainly very positive. For $11 and a full money back guarantee I figured I couldn’t lose.

I poured the entire gallon down the cleanout and let it sit in the drain overnight for 8 hours. I awoke to see no improvement. Taking a chance, I started running the hot water from the nearest faucet. After about five minutes, I heard a gurgling sound coming from the basement. Sure enough, the water in the basement was quickly going down the floor drain!! It worked!!!

I couldn’t be happier with the performance of this product and will highly recommend it to people that are in this situation.
-Joe B., Rochester, NY

It took four gallons and three applications, but we got it!!!! We have been fighting it for six days, over Thanksgiving, I am little, so I am the sewer rat, it is 23 degrees outside, and I was beyond discouraged!

One more trip to Home Depot, 2 more gallons, applied all at once, 8 hours later, LOTS of hot water, it backed up and backed up, and then it cut loose!

Yeaaaa! I'm 74 years old and it isn't that much fun anymore. So, thank you!!!
-Jigger D. from Neilton, WA

I'm compelled to share a little positive feedback with you. For background, a couple of years ago I used your "Main Line Cleaner" product on my badly stuck main sewer line. Three applications, carefully per instructions, failed to open it, and I was forced to give in and call a plumber. As it turned out, it was a pretty heavy root encroachment requiring a heavy duty industrial snake to drill it out.

Disappointed, I took advantage of your guarantee, sent you the receipts for the three gallons of product, and you graciously and quickly sent me a full refund of my purchase price. If I wasn't happy with the product, I was certainly more than impressed with your support for it, and your promptness in honoring my claim.

With that in mind, last week I had a total blockage in the side line from my laundry room. I tried a few doses of crystal Drano, my cheap homeowners' snake and a lot of elbow grease, and absolutely couldn't budge it. I was down to calling a plumber, an action I dreaded. Based on your level of support for your product the previous time, I decided to try your Main Line Cleaner once again, feeling assured that I had nothing to lose. I let it sit for a day, hit it with hot water, and it broke free and drained! I just finished testing it with a load of laundry, and it seems perfectly healthy now. This time, it *did* do its job, did it well, and it save me a costly visit from a plumber. I'm *very* pleased, and I just thought I should let you know.
-John Eads.

I just purchased a house that unknown to me was literally constipated, having a solid 6 feet of waste blockage in the sewage drain. After searching around for a tool that I could rent, I came across your website and your main line cleaner.

After following your directions, and waiting the 8 hours for it to do it’s job, I poured boiling water into the drain. I was shocked to see how fast the drain emptied. I opened up the clean out plug and the pipe was cleared. I would defiantly recommend this product.

P.S. I have a mixture of cast iron and cpvc pipe and neither of them were affected.
-Joseph J. from West Warwick, RI

OMG!!! it worked, it worked EXACTLY as you said it would.. I was extremely skeptical , even reading all the reviews... I bought 2 bottles of main line cleaner at Home Depot AFTER, snaking the line, taking kitchen sink apart, and trying to clean air vent on roof.. add a bottle of drano somewhere in there and NOTHING!!

1 bottle of your product , 8 hours, and 2 pots of boiling water and we are on the fast track again... thank you so much, I am going to keep the other bottle on hand.. I am going to recommend your product to EVERYONE I know. from a single mother on a tight budget, THANK YOU!!!

-Jennifer Kettler from PA

I wanted to e-mail you directly and extend my compliments to you and your company for your professionalism and customer dedication. I recently purchased 2 gallons of your Main Line Cleaner to assist with a sewer backup issue I was having in my home. I saw the “Money Back Guarantee” tag on the bottle but to be honest held out little hope that should your product not work that it would be worth pursuing. After using the product as instructed and doing an additional second treatment my main remained clogged and it took a second visit by a plumber to do the trick. In no way however did I feel your product was inferior. I did however send off my receipts to avail of your guarantee, assuming it may be a futile gesture. Yesterday, your refund check showed up in my mail. I was surprised as this sort of customer dedication and willingness to stand behind a promise seems to be a lost art in many corporations, but clearly not at Scotch Corporation.

I also wanted to let you know there are now 2 new bottles of your product in my basement and I will use them at 3 month intervals to keep my main line clean going forward. Additionally, over the weekend, I recommended your product line to a friend who was having similar issues with his drains and in his case your product worked as advertised saving him a large bill from a plumber.

Again, my compliments on your service and willingness to stand behind your products. You have made a long term customer out of me and I will not hesitate to recommend your products to friends and family. Continued success in the future.
Patrick C. from Baltimore, MD

I would like to post a testimonial regarding the Main Line Cleaner. Where would I do that at so EVERYBODY can see it??? I LOVE THIS STUFF!!!

Had a nightmare that I truly thought was going to run me hundreds of dollars (actually did cost me $100 when I made the mistake of calling my home warranty company and they sent a shyster plumber that did absolutely nothing!!).

Bought the Main Line Cleaner because it offered 100% money back guarantee. I followed the directions (had to use 3 gallons in my kitchen drain, the bathroom sink and the tub/toilet). After letting it sit for 10 hours, I did what some of the other reviews said to do and actually boiled water to run down the drains. I also had to put some major plunging to the tub and toilet but after about 8 big pots of boiling water and plunging, it started to run slowly at first, then there it went!!

Toilet now flushes without hearing it gurgling in the sink or backing up in the tub. I can run water in the kitchen without filling the tub and can take a shower without taking a dirty bath at the same time!! I am still running boiling water down the drains for a little while longer just to make sure it is clear but I can actually go home with a smile on my face instead of going home worrying about what this is going to cost me. I really think maybe a little critter may have somehow crawled in the line when it got so cold here to stay warm cause it all the sudden happened right after the first freeze but whatever was stopping the water from flowing seems to be a distant memory!! THANK YOU INSTANT POWER!!
Nancy B.

I went to Home Depot and looked at what was available and since our clogged shower drain seemed to be the “worst case ever” for us, we selected your “Main Line” product…

Didn’t really want to use chemicals at all, but felt we had no choice…other than to call a plumber, which I definitely did not want to do… We did not have “slow drainage” – there was complete stop – no drainage at all…so I manually emptied out from the shower floor and then “sucked up” from pipe as far as I could…and then I poured in the liquid…could not empty all in one go, but was surprised to see how level sank and allowed for more until container had been used up… Let it sit overnight… Morning after I boiled water and poured in – two large pots…did not back up…! Then I took hose and forced water down drainage – not a hint of resistance or backup…Problem solved!
Now I don’t have to call little brother the plumber except to tell him this product works!!!!!!!!

About every year or two we would have a backup in our main line and had tried various chemical treatments, but none of them had worked. My brother is a plumber and would have to snake the almost 100 ft. main line which usually took 2 hours each time to free the blockage. He suspected there was a belly in the line somewhere that would accumulate grease, debris, toilet paper, and other things that would normally break down quickly.

My wife read about this product and I bought 2 gallons to try. I poured both gallons in at night and in the morning poured about 4 gallons of boiling water followed by hot water. After a couple minutes it backed up again. I waited 10 more minutes and checked, to my amazement the water had receded. Followed by 10 minutes of hot water and the line is clear.
Now I don’t have to call little brother the plumber except to tell him this product works!!!!!!!!
Mark B.

I just want to say thank you so very much for your product. I had a main line clog in my house for about 4 days and nothing was working, I came across your product my accident when i was looking up ways to try and fix the problem my self before calling a plumber ,and decided what the heck what do I have to lose.

I purchased your product for only 10.00 at Wal-Mart, poured it down the drain waited 8 hours and flushed it with boiling hot water, and to my SURPRISE I could run the water again. So I just want to say THANK YOU SO VERY MUCH. I will be telling everyone about this product. and if I ever come across this problem again its your product I will try first.

Jamie H. from Fulton, NY

“I live in a 48 year old house in the Maryland suburbs with pipes that are not what they used to be. My bathroom pipes have been giving me trouble for ages but I’ve been able to keep the tub and toilet clear and working smoothly with occasional bleach pourings. The bathroom sink began to clog up about 6 months ago, even though I shave in the shower, and it kept getting worse.

I tried Drano and Liquid Plummer with little success so I decided to get a friend with a snake to clear out the pipe. He went out of town for Spring Break so it was time try a gallon of Main Line Cleaner as a last resort. There is a money back guarantee so I figured I had nothing to lose. I followed the instructions religiously and holy cow–it worked beautifully. I did use boiling water from a kettle instead of just hot water to finish the job because other customers reported better results with boiling water. ”

P.S. Please give your chemists a fat raise. They earned it!
Leo H.

“Your product works after failure by mechanical effort. Hours of snaking with two different snakes; draining and refilling the whole system from the sink to the main sewer with hot water, baking soda, vinegar, all kinds of soap to cut grease or whatever was causing the problem; then a shop-vac from all openings using it to suck out the water as as to pressure to lines to dislodge anything; then cutting into pipes to allow for different areas to access with snake and the like, all for naught.

After all effort that in desperation i poured in a bottle of main line cleaner and waited a few hours....and voila, a well working drain....Thank you for a great drain cleaner! ”
Judy B.

“I purchased your product, “Main Line Cleaner” on February 04, 2013 as a last resort to a stubborn plumbing problem after everything several alternative efforts failed to undo the clog. I decided to try a cleaner before I took the next step of having to snake out the line which called for a lot of additional work to gain access.

I applied the product as directed on the label and flushed it about 9 hours later. I am pleased to say that the lines have never been cleaner and the sinks drain in record time. This product lives up to it’s claims and I would highly recommend it to anyone to try before resorting to the mechanical means of clearing a line. Looking over a large selection of drain cleaning products, I am very pleased at my selection and it ease of use. Keep up the good work.”
L. Smith from Mesa, AZ

“My drain that handles the kitchen and laundry in the basement under the floor backs up about every 2 years and is sluggish most times. “My drain that handles the kitchen and laundry in the basement under the floor backs up about every 2 years and is sluggish most times.

5 days later the laundry and kitchen drain was backing up. I am a 48 year old single mom with 2 children still at home and I have no more money to spare. I bought your Main Line Cleaner just because of the money back guarantee and I was extremely skeptical. I used one gallon of cleaner at 10am this morning and at 8:45pm I tried hot water but no luck. I boiled a large soup pan of water to send down the drain and I also sent down 2 tea kettles full of boiling water. IT WORKED!! I really thought that it wouldn’t but it did and I did not have to get the plumber back and pay more money!!”
Connie S. from Ohio

“My main line was blocked solid…water burbled up every drain but would not go out. Days before Thanksgiving, Christmas coming, no extra money – and hate DIY home repair. Wishing I had not gotten an old house. Bought other brand crapola…futile. Saw the name ‘MAIN LINE’ and 100% money back. Prayed for the fix over the $9.95….poured, prayed, slept in anticipation…..plug was solid for 2 days, only one day until Thanksgiving…..young kid (and I) needed a bath…(lots on the line) Woke up and felt excited like Christmas morning. Ran the hot water…nothing at first….ran some more and WOOO-HOOOO swish!!!" THANK YOU – THANK YOU – THANK YOU! Need anyone for a commercial? We are it! Sooo Thrilled.
Gabrielle R. from Delaware

"I would just like to say thank you for a great product in main line cleaner. I was a hardware associate at Walmart in the hardware department and I had a drain problem at my home like everyone else I used the other products without getting any results I picked up a bottle at work and read it ,so I thought I will try it and see if it work needless to say I was impressed and my wife was happy.After using it I would recommend it to all my customers who came in with drain problems. Again Thank You"
Germaine J from Missouri


“It is very rare that a company will place such a “guarantee” on a product, and to be perfectly honest, that is exactly why I purchased it. “If this product did not work, I wasted only a little time, but would receive my money back!”

I was totally shocked by the complete delivery your product provided. I’ve snaked, used other products and established an acceptable low flow return… but Main Line Cleaner in a single application positively opened our clog and my drain is running like it was just installed!

I am very impressed and pleased with your marketing and especially your product efficacy. Great product. I have been an Environmental Inspector/Assessor since the mid-1980s and continuously run across clogs and slow drains. I will highly recommend your product to all my customers and clients. Again I want to say “Thank You” for a product that delivers as it is advertised!!”
Nick M.

"This product is great. the only thing you should say on the directions is instead of running hot water down the drain because it does not heat up fast enough is boiling water and pouring it down the drain it is awesome, thank you."
-Alfreda N.

We’ve lived in our house only 3 years and already I’ve spent over $1000 on two incidents of a clog in a waste pipe where the master bath drain comes down and meets with the kitchen waste line. Both times, my plumber came out with the power snake and spent hours trying to ream out this clog. It’s several feet from the kitchen sink so Liquid Plumber couldn’t get that far, and it probably wouldn’t have worked anyway. Last year, my plumber said, “OK, I fixed it again, but if this happens next year, we have to take off the siding and see what is wrong with that part of the line.”

So, just a year later, like clockwork, I came downstairs to find my shower water backed up into the kitchen sink. On a Saturday, when no plumber will come out to our remote area.

I searched online and read about Instant Power Main Line Cleaner. I got directions to a Wal-Mart and bought all 3 bottles on the shelf. I poured one bottle into the upstairs shower drain and one bottle into the kitchen sink. These are 1-gallon bottles, so the liquid gets past the trap. My clog isn’t in the trap, it’s almost 4 feet farther than that.

I let it all sit for 18 hours. On Sunday morning, I filled my tea kettle and started pouring boiling water into both drains.

At first, I thought it didn’t work. There was a backup of water to the kitchen sink. But after I poured another tea kettle into the upstairs drain, the backup disappeared. I poured in a couple more gallons of boiling water for good measure. No backup. I ran the dishwasher and took a shower. No backup. I saved $500!!

I am not kidding myself that the pipe is good as new back there. I think I need to treat this area proactively, maybe once a month. But I could buy 70 bottles of Instant Power for the cost of a single plumber visit. Awesome stuff!
-Carol H.

" We recently purchased "Main Line Cleaner" at a Menards in St. Paul to use our on our clogged drains. My wife was impressed with your money-back guarantee. We followed the directions, and the next morning the drains were like new. Both our basement drain and first floor tub drain were working like new. Very, very impressive. We will pass along our experience with friends and family. Nice to use a product that does what it claims the first time around.
-Charles M.

“I have been washing my dishes in a plastic tub and dumping the dishwater down the toilet for the last 3 weeks. Why? Because Drano couldn’t handle the clog in my kitchen, and I didn’t have the money for a licensed plumber. I bought a gallon of Main Line Cleaner and the problem went away while I was sleeping. Woo-hoo!!”
-Bob S.

I just want to thank you for such a great product ;the day after Christmas my tub and toilets were backing up, all of my sinks and toilet on the first floor would back up in the bathroom and laundry room in the basement. I mean everything was coming back up in the tub and from the drain in laundry room. I really did’nt know what to do, right after Christmas and I just could not afford a plumber at this time est. $175-$350.00.

I searched the web and found your product(Main Line Cleaner), after reading several of the reviews I decided to try this, All I can say is THANK YOU, THANK YOU, THANK YOU.

I searched online and read about Instant Power Main Line Cleaner. I got directions to a Wal-Mart and bought all 3 bottles on the shelf. I poured one bottle into the upstairs shower drain and one bottle into the kitchen sink. These are 1-gallon bottles, so the liquid gets past the trap. My clog isn’t in the trap, it’s almost 4 feet farther than that.

After following the directions; pouring solution in the basement tub and waiting 8 hours, I boiled 2 stockpots of water and poured in tub and then ran hot water. At first the water did not move, so my daughter decided to plunge the toilet and wow we heard the big gurgle and all the water went down in the tub and in the laundry room. I will be using your products to maintain my drains from now on. I immediately called my family and friends raving about your Main Line Cleaner.

Your product is truly a blessing, this could put plumbers out of business of clogged drains. Again thank you and Happy Holidays.
-Michelle from Bolingbrook, IL