Drain King 345 Unclogs Bathroom Sinks, HVAC Condensation Drain, and Swimming Pool Drains, .75 to 1.5 Inch

Works as it's supposed to. I used it to unclogged our whole house ac drain. Cleared it in a few seconds and so much gunk came out. I can also use this for bathroom sinks because it is the right size for it.

The product is fabulous for A/C condensation lines. If your line is quite a short run (less than 15 feet or so to the outside), you may have no issues anyway. But with a 55-foot line that runs under the pad on which the house sits, it's a different story -- especially in a southern state where the constant heat is an incubator for slime. Even with a shorter pipe run, giving it a good flush can't hurt one bit, and might make the machine run more efficiently.This thing has saved us well over $300 in service calls. (Before I had it, I called and he blew out the line with compressed air). Water works just as well using this product, and it's exponentially cheaper than a service call.KEY TO NOTE: Turn on water very slowly; do not go full blast all at once lest you bust the rubber bladder. The key is to slowly increase the pressure and blow all the gross out of the line. It's also a good idea to go ahead and change the inside air filter too if it's been a while. Might as well, while you're at it...Incredible product. I bought two more: one backup, and a backup to the backup.

This funny looking device is a priceless help to anyone needing to clear an Air Conditioner Drain. You didn't know your Air Conditioner even HAD a drain? Good for you. I just learned that they DO, after carpet in our hallway got wet. Wet carpet? From what? Tracing the puddle back to its source, I got a quick education on something your A/C Technician already knows about.Somewhere, under the whole house air conditioner unit (you'll probably find this behemoth in a utility closet in your hallway), there is something called a "drain pan." This drain pan catches the moisture that evaporates out of the cooling mechanism for an air conditioner, called an Evaporator Coil. Condensed moisture drains off this evaporator coil and into the drain pan, which actually has plumbing attached to drain the excess water collected into it and out of your house. UNTIL IT BACKS UP. Then, you get a puddle on the floor, like I did.THIS IS HOW YOU FIX THAT PROBLEM. Your A/C drain can get plugged up with either 1. Algae or 2. Calcification/Mineralization or 3. Both. You can knock out the algae by pouring a little bleachwater into your drain. I've since learned most A/C people recommend you treat your drain this way about every 6 months. That's what they charge you to do, when they "flush your system." If you have more minerals than algae, you need to use a little CLR Jelmar CL-4 CLR 128-oz. Calcium, Lime & Rust Remover to dissolve the minerals in the PVC drain, then rinse with water. It's best to then fully clear the drain with a device like this.The way we fixed ours was: a little bleachwater (which didn't clear the blockage), added a bit at a time till the drain worked a bit (this is added directly into the PVC drain, NOT into the A/C's drain pan). Realizing that algae wasn't the root cause of our drain blockage, we waited for the bleach to clear, rinsed the drain slowly, then added 1/4 cup of CLR, which opened the drain further. Once it was draining a bit, we bought this, added a bit of CLR again, waited 10 minutes, then inserted this little device fully into the PVC pipe (after screwing a water hose onto the end), then turned on the water to finish "cleaning" the drain. (Just a note: in our case, the PVC drain has TWO inlets/access points. We blocked the lower one's 90 degree coupling (which feeds back into the A/C unit drain pan) with a stuffed rag temporarily during this procedure, just to prevent any possible backflushing--look at your own setup & you'll see what I mean. Alternatively, you could use this device in that drain inlet, as well, as long as it's long enough to totally block that 90 degree coupling; I'd still advise using a rag or PVC plug to temporarily plug the other inlet, just as backflushing insurance).It worked like a champ; the water flowing out of the hose works to "swell" the rubbery part of this device; while allowing water to flow through it, it doesn't allow any water to 'back up" through the drain. This increased water pressure helps "blow out" any remaining debris plugging the drain. Problem solved!It works great, is easy to use, and does the job with ease. MUCH better and more efficient than just trying to block a water hose with a rag or other leaky, messy solution. This was a quick & easy fix for our A/C drain; highly recommended for quality, utility & value!FYI UPDATE 8-27-15: Just a reminder: two other possible causes of A/C leaks are 1. Dirty Filter 2. Clog in drainpan. A dirty filter is fixed by changing it (see Owner's Manual for your AC). Clogs in drainpans can be prevented by using acid tablets in the drain pan, usually done by an AC technician. DIY options for these are available at Amazon and searches at Google and YouTube can teach you how!

Fantastic product, I bought it to clear out my AC condensation drain line, not really the intended use but it has came in clutch several times

Headline pretty much sums it up, get one of these, add a 3/4" garden hose shutoff valve between this and your garden hose, snake that thing inside and blow the crud outta your condensation drain. Repeat every couple months, depending on your AC use. Works like a charm but don't ever turn the water on unless the bladder is fully inserted in the drain - it will get really big, really fast, and explode. Suffice it to say, this is my second purchase of this item.

I bought this because I had a clog pipe at my house. Put it in pipe, turned water on and not even 30 seconds later it popped pushing water everywhere. Do not recommend!!!

This item is a life saver, it provides great pressure in small places andworks great in my AC drip line.Fits my house well and provides great seal with no drip.I would buy it again.

Like many, I understand pressure and resistance in a clogged line. Turn the water pressure up too fast and of course most products will burst with enough back pressure. Well, I was careful, but this worked once and then burst on the second use. Good for one cleanout? Eh.