DiversiTech Pro-Treat 151 HVAC Drain Pan Treatment, 100 Tablets

Good product to remove residue

It is easy to use just drop in the drain pan close to drain,although it may be too early to tell how well it works. It has only been a month but the A/C drain appears to be flowing.

Since this is a product that you really can’t see if it’s working, I really can’t say much about it. I do know the A/C tech applied three pills down the drainage pipe per the instructions on the bottle. After that, each application every month is one pill, which I added a couple of days ago. I would say that as long as my drainage pipe doesn’t get clogged this summer then this product does work.

This was recommended by our HVAC specialist. We had an awful mildew and mold smell for a few days that got worse and worse. I realised it was the condensers on our HVAC. This came, I used them, and then the smell was gone within a day.If you want to keep your AC unit nice and neutral smelling to the point you forget it’s there, get this! Trust me, you don’t want to remember for all the wrong reasons….

A bit pricey. Price went down after I purchased item but it works fine.

small tablets fit easily into 3/4" PVC breather pipe on drain line. I had been using diluted liquid bleach. Plumber recommended this product as it is easier on the life of the pvc piping.

Easy to use

As described.