Grundfos59896341 UPS15-58FC Super Brute Circulator, Red, Small

Put this on my natures comfort outdoor wood stove. Worked well and was easy to install. Good quality built and good reputation. This is my second one.

I bought this cause my older unit the capacitor went bad. It cost of replacement was the cost of a newer unit.the newer unit has three speeds and a check valve that is removable. I left mine in.

Quiet and reliable. Wish it had an integrated bleed valve (maybe they do now, they didn't in 2016). I'd recommend installing a ball valve with bleeder on the inlet side (bleeder facing away from the pump) if using for recirculation, bleeding the system is critical for operation, and has to be done every time my plumbing is drained. Ymmv.

Installed this pump last July during boiler shutdown. Throughout this winter so far, after several severe cold weather spells, this pump has performed flawlessly. It is very quiet---I only hear water moving in the pipes if I listen carefully!! This pump is Silent with a capital S! We had a conventional pump/assembly and electric motor set-up for 20+ years and those were noisy (at the boiler and throughout the system). Now, all I hear (At the boiler) is a click from the thermostat relay and the burners lighting in the boiler. Wish I knew of these pumps some time ago. Installation was less a headache than I expected. The best part = no more oiling. I used to oil the motor and the bearing assembly in the old setup and spent many moments trying to second guess myself on whether I got it right. I left the old set-up on a shelf in the garage in case I needed it. Now it looks like I can get rid of the old parts. I kept the check valve in the pump when installing and noted the water must stay stationary when the boiler is off because the temp of the pipes at the boiler remain hot. This tiny pump has more than satisfied the heating needs of our home under all conditions thus far (January 16, 2014).

I replaced an existing Grundfos pump that went kaputt after 13 years. All the input from community regarding my questions was very helpful. The flange shape was slightly different but the O ring fit both openings that were already plumbed in. I tightened the bolts and no leaks thank goodness The old pump was single speed , the new one 3 speed. I cut the difference and set it to medium. I was able to use the existing power cord and connected easily to the pump’s electrical configuration. Quiet and most importantly instant hot water. I ordered the flange kit, but didn’t need it since It came with new O rings and was able to use the same housing and bolts that were there already. If I even get half the life I got from the last one, I will be very satisfied because the price is right.

The first one we ordered was rusted inside and noticed that the inside of the box had been wet and the instructions were also water damaged. We received a new replacement without any issue

This product Warranty covers 24 months.After 13 months, this Super Brute Circulator pump disintegrated. I researched the warranty, procedure which says to call the seller.I called Amazon and they do not do warranty service beyond 30 days but referred me to the manufacturer's rep. who stated that since I bought it through Amazon I that need to "fight" it out with them!!!Amazon came through and refunded my purchase through the A to Z warranty!Thank you Amazon!

I use this pump to circulate spa water, to and from a hot water heater. I have had my spa for maybe 25 years and this latest Grundfos is perhaps my 3rd one. It is run day and night, 24/7. The pump is absolutely silent, which is amazing based on the amount of water it pumps. The pump draws about 25 watts of electricity continuous, so I don't think it affects my electric bill very much. This is a cast iron pump, so my spa water with the spa chemicals will eventually rust it shut requiring replacement. "Eventually" meaning years in my case. I have experimented with a lot of pumps for various applications, but this pump is by far the best I have found. I suppose I could buy the more expensive stainless version of this pump, but I can live with replacement every few years using cast iron. Remarkable product in my opinion.