HVAC GUYS – Flow Treat Tabs - 200 Tablets | AC Drain Line Cleaner | Prevents Odors, Keeps HVAC Drain Pan Clean, Prevents Overflow | One Tablet Lasts up to 4 Weeks

My HVAC guy recommended I buy these. I place them in my unit monthly and have no problems. Well worth the money and gives a fresh sent when you place them in the water pan. I have been using these since June 2025 after l having routine service. We had a blockage in March 2025 even after cleaning and using a shop vac to suck out the gunk. These tablets definitely work better than the white vinegar cleaning method. I still hook up my shop vac twice a year as part of my normal preventative maintenance.

Excellent product, worked perfectly and within minutes.

Work great. Used to have problems with algae buildup that clogged the drain lines and caused a weird smell. These cleared it up really quickly and have prevented it from happening again. Also really easy to use. Just drop one tablet so it lands in the drain pan every so often and you have nothing to worry about.

I've been using these tablets in my condensate pump for several months now, and they've worked great. Since adding them, I haven't had any issues with mildew or sludge building up in the pump or the discharge line. It's been a simple way to keep the system clean and running smoothly. Definitely a product I'll keep using.

I’ve been using these Flow Treat Tabs for my HVAC drain line, and they’ve worked well overall. The tablets are easy to drop into the drain line and seem to help keep it clear while reducing musty odors. It’s a simple maintenance step that gives me peace of mind. The only reason I’m giving 4 stars instead of 5 is that the tablets dissolve a little more slowly than I expected, and the instructions could be a bit more detailed for first-time users. That said, they do the job, and I would purchase them again as part of my regular HVAC maintenance routine.