Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

circulation pump in hot water system

billd
billd Member Posts: 2
in THE MAIN WALL
A very old unmarked pump has failed, how do I know what to replace it with? Thinking about 3 speed Grundfos UP series.
One guy says 1 gallon per minute flow per 10,000 BTU, my boiler has 84,000BTU output.

Comments

  • Ron Schroeder_2
    Ron Schroeder_2 Member Posts: 176


    A Grundfos UPS15-58FC or UPS15-58FRC will replace about 90% of the pumps on residential systems. The S means 3 speed. The FC has the flange bolts rotated 90 degrees from a Taco and the FRC has the flange bolts the same as Taco. The C means it has a built in check valve. The check valve is removable if you don't need it.
This discussion has been closed.

Categories