1/6HP Portable Utility Pump Submersible Small Backup Sump Pump Draining Tool to Remove Water from Flooding House Basement Pool Tankless Heater Flushing Pump with 10-Foot Cord SUB 1100

worked as advertised. Used to clean tankless water heater. Did a great job.

Worked great for descaling tankless water heater.

I used this pump to flush two different brands of tankless water heaters (Rinnai and Takagi) and it worked perfect for both. For both of them, I put 3 gallons of vinegar in a 5 gallon bucket, dropped this pump in there, used a couple washing machine supply line hoses to make the connections, and that was it. One final note, since several other reviewers mentioned having to do different things to "prime" the pump (e.g. turning the pump on and off; unscrewing the hoses; etc)...I found that all I needed to do - after submerging the pump and plugging it in - was simply tip it to the side for about 5-10 seconds. You'll see and hear it sucking in the liquid (vinegar in my case) and then it immediately started pumping. Super easy.

I bought this pump to do a vinegar flush of my hot water heating coil and for use in draining a hot tub. The coil flush came first. Paid attention to weak threads and needing to tip unit to prime it. Pump worked well for purpose, but noticed bypass flow coming out between bottom head and main body... Upon further inspection, the bottom inlet screen/head had warped (1/8" out of flatness). O-ring was no longer sealing it to body. I know the fluid had heated to 130+ degrees as it was too hot to comfortably keep hand in. Just be aware that the 95F temperature limit may be pretty accurate although not clearly stated in description. Draining a heated hot tub is probably fine, but not much more. Still a good pump for the money though!

Great unit for flushing our tankless water heater (1/6hp recommended). Competent and very reasonably priced.

This pump only worked once. I had running for 90 minutes then I shut it off for about 15 minutes and it never worked again. I followed troubleshooting and ensured there was nothing plugging or binding. Water I was pumping was crystal clear. The motor would run but not pump anything. Then it just stopped working all together.

Powerful little Beast. Pump works Perfectly!!

This pump worked great. I submerged it in a 5gal bucket with a vinegar mixture to flush two tankless water heaters. The flow was perfect for that, maybe even a little over kill. Between both jobs the pump ran continuously for several hours with no issues.

very good product

Good water pump for tankless water heater flushing. I bought this pump to flush my Navien NPE 240A for the first time after 11 years in service. It worked nicely with no issue. No need to prime, as some other reviews mentioned, as long as the pump is fully submerged in water/solution.