J.C. Whitlam FLOW32 Flow-Aide System Descaler ,32 ounces (1 quart) , White

Used on a Rennai tankless water heater that was 18 months in service on city water. Flushed for 60 minutes. Inlet filter was clean before and after the flush. Flow-Aide doesn’t say on the label, but in does make your flush mix an amber or yellowish color. After flushing for an hour the water was clear or a slight blueish. This shows that the flush was effective. Will be using again in 12 months!

This stuff is amazing. Far more effective than plain vinegar in my Rennai heater. I couldn’t believe how much build up it removed. Will use this from now on.

This stuff works way way better than vinegar. I have been using vinegar each year but this year something changed and my Navien tankless water heater was making noise all the time. I flushed it twice for over 90 minutes and the vinegar looked a little bit gray but not dirty. The sound persisted and then I went online and did some research. JC was suggested and I'm never going back to vinegar. After 45 minutes the water was filthy! And that was just days after the 2 separate vinegar flushes! Don't hesitate to try this!

Bought this to de-scale my tankless hot water heater. Works as advertised. It's a little expensive compared to vinegar, but doesn't slowly dissolve the copper pipes inside the water heater. I probably won't use it every time I need to de-scale, due to the expense, but I will put it in rotation since it's probably more effective on certain types of scale. I very much appreciate that it's non-toxic and biodegradable.

This product makes flushing my tankless water heater incredibly easy. What used to seem like a job only a plumber could handle is now a quick DIY project I can take care of myself. The instructions are clear, and once you get set up, the whole process is smooth and hassle-free. The best part? It saves SOOOO much money. A plumber would charge several hundred dollars to do exactly what I can now finish in less than an hour with this descaler. The results are great and my water heater runs like new (and stays that way because I keep up with the maintenance). I know I’m also extending its lifespan and protecting my investment just by doing this once a year. DIY setup I used: - A clean Home Depot/Lowe’s bucket - A small circulation pump (I used the same sump/water cleanup pump I keep for my basement) - Two 6' washing machine hoses for easier reach - The service connections my plumber installed on my tankless unit I connected the pump output to the service valve on the heater, ran the return line back into the bucket, and used a small clamp to keep the hose in place. Once everything was hooked up, I let it circulate with the descaler for an hour (longer if there’s heavier scale, per the directions). All of these extra items are reusable. You just need to buy this descaler annually. Rinse everything afterward, let it dry, and it’s good to go for next year. If you own a tankless water heater, this is a must-have. It’s one of those products that pays for itself after the very first use.

The water heater flow was slow when the shower was first turned on. Used this to flush it, no more problem. Flow is back to normal and just like new

We recently bought a property with an instant hot water heater. It kept giving us an error message. I ran this flush through and could not believe the stuff that came out. Water heater now works perfectly.

I have to flush my tankless water heater every 6 months. My dad showed me how to do this once and I was worried it’d be complicated- but nope. This is my go to. It’s sooo quick and easy- just set it up and let it run for about 30 minutes and immediately my water pressure is back. It’s the easiest thing ever