- 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.

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.

Good product works good

These tabs are a bit smaller than the pvc tube so you end up using more than a different brand. They are doing the job and keeping the algae buildup at bay.

Good value. Seems to work well.

Great product

Leaves a pink red stain on my concrete from the drain line