Bests & Worsts Reviews from Amazon

For people getting a pump to facilitate a flush of a tankless water heater, this device works great. I ordered it because it was rated at 14 GPM at 10' (although the distance from the floor to the clean-outs is more like 5' in my configuration) but discovered to my horror that I'd misread the instruction for the tankless heater (a Rinnai V75i), which says to "circulate [the vinegar] through the water heater for at least 1 hour at *4* (not *14*) gallons per minute I emailed Rinnai tech support about the flow rate and they said the pumps flow rate was fine. So I used it, and indeed everything went fine. Very satisfied. I purchased this pump in conjunction with a clothes washer hose kit and a bucket (and the vinegar) at my local Walmart. Much cheaper than getting a "kit".