Flow Shield - AC Drain Line Cleaner and Maintainer

This 2-pack of 8oz AC drain line cleaner is a simple, effective solution for my home AC maintenance. The bio-enzymatic formula pours easily into the drain, breaking down buildup quickly to prevent clogs and overflows. As someone who’s dealt with water damage from blocked lines before, I appreciate the fast-acting results and up to 3 months of protection per bottle. It’s straightforward to use—no mess or tools needed. Highly recommend for keeping your AC running smoothly and avoiding costly repairs.

Drain line cleaner seems to be working as it should. If future checks show it not being as effective as expected I will return to update this review. We are also using it in the drain line of our dehumidifier and have noticed that we aren't experiencing the sour odor that was present before using the cleaner. The two bottle price is a good deal that makes it even better to purchase.

This HVAC AC Drain cleaner works great.It is easy to use and two bottles is perfect when you have multiple units. It is a great value. I am happy with this product and would order it again.

This product has done exactly what I needed—kept my AC drain line clear and flowing without issues. I had problems in the past with the line clogging and causing water backup, but since using this cleaner regularly, I haven’t had any trouble.It’s easy to apply, safe to use, and the 2-pack is a good value and provides peace of mind for months at a time.

Living in Florida, you quickly learn to perform AC maintenance regularly as there is nothing worse than your AC going on the fritz in the middle of summer and the AC repair guys being booked out for days. I try to clean my AC drain line every few months to make sure buildup doesn't form and cause an overflow. So far, I've used a bottle of this and it seems to be working just as well as the more expensive brand I've been buying from my local hardware store. The bio-enzymatic formula is supposed to eat away at the algae and sludge that forms in the line, and I haven't had any clogs since starting to use it. $19 for two bottles is a pretty fair value, but I like to add a good amount of vinegar to the drain line first, wait a bit, then add 2/3rds of the bottle. This way I get 3 applications out of each bottle and save a bit more. Been doing it for a while now and it works great, no issues with water backing up or that musty smell that comes from a dirty drain line.