Direct Inject Small System with UV Dye - Refrigerant Leak Sealer - Detects Large Leaks - Ideal for Most Small Home Appliances and HVAC Systems up to 1 Ton - Proudly Made in The USA

I used this on an Active Aqua AACH25 chiller that I use for fermentation temp control in my home brewery. The chiller developed a leak after 2 1/2 years and wouldn't cool. I was about to drop several hundred $ on a new chiller when I found some YouTube videos showing how to add refrigerant to small refrigerators. I used the Supco BPV31D bullet piercing valve to tap into the low pressure side freon line and refill the R134A refrigerant with a can tap and gauge (all purchased on Amazon), but after 4-6 weeks the freon pressure was low again so I was happy to find this product. The female end of the Leak Saver connected directly to the BPV31D, and the hose for the can tap and gauge connected directly to the male side of the Leak Saver UV. With the chiller turned off, I had enough pressure in the system to do a brief purge of the connection between the leak saver and the BPV, and then purged the connection between the can tap / gauge hose and the leak saver with freon from the can. I then pressurized the hose from the can with the BPV closed, closed the valve to the can and opened the valve on the BPV. That's all it took to empty the Leak Saver UV into my chiller's freon line. I powered up the chiller and proceeded to top off the freon to the desired pressure right through the leak saver, let the system run for an hour, closed the valve on the BPV and butttoned everything back up. It's been 2 weeks, the chiller is working great and the compressor is running quieter than ever. I will update this review in a few months to report on whether my slow leak was fixed with the Leak Saver UV.

One of my A/C has a very slow leak: It takes months (3 at least) for the pressure to become noticeably low and, even then, it's just below normal operating range, never "empty". I had already tried to find the leak; I have reattached all the couplings 3 times already. I don't think the problem is there. Due to the extremely slow loss, it seemed a perfect candidate for this solution (as it's indicated for leaks of "more than 7 days to empty"), but unfortunately, it didn't work: The time it usually takes for the unit to show signs of low pressure went by, and it did; it started to show symptoms as if I hadn't used any sealer. I haven't been able to find a UV trace either. Why 5 stars then? This company is truly behind its product, and they made it right for me; so much so that I am giving the product a second chance (this time, if it doesn't work, I won't hold it against them: They already took responsibility for the first instance.) The moral of the story is: I recommend this product even if it didn't work for me. It seems it does work for other people, and the company is true to its word.

Yes

I tried this on two mini splits that had slow leaks before I found Nylog. The first seems okay. The second one must have had bad product. It was a 2 year old system that was a little low. I shot in this leak saver and it was very slow going in and made a farting sound. Much different than the first one I used. The gas was very slow going in. Unit ran for about a half hour and the compressor started making a loud banging sound every few minutes. The sound kept getting worse. By the next morning it was making a grinding sound and was working poorly. I know when you disconnect service hoses you will get some splash as found on the first unit with UV. The second unit that had the problem showed small bits of solid yellow under UV. Not splash. I disassembled the system and shined UV in the lines. I got NO UV indication in the lines. That means the Dye/ leak saver must have been solid upon install. If it was liquid it should have been distributed through the whole system after a few hours running. The unit is trashed and I had to buy a replacement so now I am out the 30 bucks spent on this product, 600 for a new unit and some expensive R410A. Plus labor and parts to fix the wall. I figure good luck getting anything back from leak saver and am not going to waste my time. STAY AWAY FROM THIS PRODUCT!!!!!

Very easy to put in. My RV AC would last almost a year before I had to add Freon a very slow leak so I don’t know if it works yet or not, I will come back later to update.

Updated to five stars. I had a batch with bad depressors for the access valves and the product didn’t get into the system. The manufacturer made it right and that’s cool. I’ve used quite a few of these and have had great odds with it.

Did not work. Tried it on a mini split with a very small leak.

Worked flawlessly to seal the leak in a $1700 dollar wine cooler that was out of warranty. The manufacturer suggested I scrap it and buy a new one. I bought this along with refrigerant, gage and a pipe piercing valve off Amazon. Either YouTube and that setup the cooler runs perfectly!

Money is wasted. I own an appliance repair business and tried this several times. They say this product can seal any leak that takes more than seven days to leak all refrigerant. But every time I used this the system lost the refrigerant within two months. Do not recommend.

Plaisentraie