Grundfos Circulator Pump for Hot Water: Residential and Commercial

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PEX Universe (aka PEX-U) is a leading industrial equipment supplier offering high quality heating and plumbing solutions for real life professionals, homeowners + DIYers. The mission of the brand is to equip and empower consumers by providing the best products for heating and plumbing, delivering the most authentic customer service, and offering the most competitive prices available online. PEX Universe was established in 2004, and is based in Brooklyn, NY.

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Grundfos is a recognized and trusted worldwide leader in pumps industry with over 60 years of industry experience geared towards product quality and sustainable manufacturing practices. We stock a large inventory of Grundfos pumps in various types for residential and commercial applications.

The Alpha series pumps from Grundfos are variable speed flanged circulator pumps available in cast iron or stainless steel housing options with or without a line cord.

UP series circulator pumps are 1-speed circulators with a fixed flow and head parameters. These pumps are available in cast iron, bronze and stainless steel construction with flanged, sweat or union connections.

UPS series by Grundfos includes a large selection of 3-speed circulator pumps with an external Hi/Med/Lo switch. This switch allows the user to select desired circulator speed to match the requirements of the system.

Comfort System by Grundfos is a domestic hot water recirculation system, designed to provide instant hot water at plumbing fixtures such as sinks, showers and bathtubs, while simultaneously eliminating the waste of cold water.

This category includes cast iron flanged circulating pumps by Grundfos for closed loop heating applications such as radiant floor heating, hydronic baseboard/radiator heating, fan coils and others.

Grundfos circulating pumps listed in this category have a stainless steel, lead-free compliant housing, suitable for use in potable water plumbing systems and open-loop heating systems (hydronic, radiant, etc.). Available in single, 3-speed or variable speed options with flanged or union outlets.

All flange kits include (2) flanges, (4) bolts, (4) nuts and (2) O-rings. GF15/26 flanges are for use with Grundfos UP15, UPS15, UP26, UPS26 and Alpha series pumps. GF40/43 are for UP43 and UPS43 series pumps. Union kits are for use with all Grundfos pumps with union outlets, including models in UP, UPS and Comfort series.

Each set of isolation valves includes (2) valves, (2) gaskets and a set of nuts and bolts. Compatible with Grundfos UP15, UPS15, UP26, UPS26 and Alpha series circulating pumps. Full port design. Available in 3/4", 1" and 1-1/4" sizes in both threaded and sweat options. For heating applications only.

Replacements parts, timers and aquastats for Grundfos circulator pumps.

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[neilgreen]

Really good video. Thank you. These pumps seem to run forever.

[dmf]

Great video. Two questions. How hard can i hit the pump as mine is not working. Second how much should it be to replace my existing Grundfos wilth a new one? I am in socal. Thx.

[bradpaulsen]

I have the shaft at the correct horizontal position with control box on the bottom as it won’t fit the space if positioned on the top. I know this is not the recommended position but what is the “downside” of mounting the control box on the bottom?

[robertryan]

I'm confused, , if installed in the horizontal position, the motor would be hanging below the path of the water? Looking like a full filter hanging on a diesel engine, correct?
Thanks

[johnnygallardo]

i got 4 of these at my hotel for each floor and there conneted to a normal outlet for power should i put them on a gfci or does it matter?

[mikep]

Right now my pump is pumping down outside my boiler and back up through. I'm pretty sure this was the proper install from the early 1990's? It is a Grundfos pump and I purchased another new model like in this video. A UP15 /3 speed.
You mention that a proper air vent is installed before the pump? I'm not sure if I have had any issues with that or if my older model is somewhat different than the new one? I only have an air vent close on top of the boiler upstream.
Thanks Mike

[arcshinus]

Do these pumps need to be oiled, how often, what type of oil? Thanks.

[nathanfleming]

Is a loud metal humming a normal noise, from time to time normal?
Or is this a sign that its close to needing to be replaced?

[ChrisSConnery]

Do you have a video that shows how to install an aquastat to a system like this?

[terrykannedy]

So... Me moved into a condo that has a UP-15 and it doesn't circulate. It's spinning and not stuck, I've bled the system fully and can't think of anything else! I can get it to pump hot water for about a minute if I "jump" start the flow by opening the service valve located directly below the pump which I hook up to a garden hose to run outside. The second I feel the line get hot, I close the valve and then reopen the zone valve which is immediately after that service valve. The pipes start to quickly get hot and then about a minute later, they start to cool again.

Now.. I will say that the pump is plumbed going down. Not up. So... I guess it doesn't work that way? I've bled every bit of air out so it can't be air locking?!?!

[johnsonhoog]

I have a Grundfos UP circulating pump and Aquastat L6006C going into the electric water heater. How do I wire the two together?

[UncleFjester]

What is air locked? My plumber replaced my pump in a floor heating zone and it fixed the heat. But I hooked up the pump on a bench & it turned fine. I'm confused

[MrDavesbox]

can this pump handle 200 degree water? just curious...anyone know?

[Chrominance]

Something tells me this guy is a huge stoner

[mattmccarty]

Stop using multiple cameras, it’s weird watching someone not look at the camera.