UP15-29SU Stainless Steel Circulator Pump, 1-1/4" Union, 1/8 HP, 115V


Brand: Grundfos

Mfr Part#: 59896775

Model: UP15-29SU

UPC#: 632514174535

Availability: In Stock
Usually ships: Today, if ordered by 3pm
Qty Price
$206.95 / each & Free Shipping
x2 $399.90 & Free Shipping
(2 x $199.95 / each)
  • Description
  • Literature
  • Reviews (16)
  • FAQs (1)

Grundfos UP15-29SU (59896775) model circulator incorporates a stainless steel body design and 1-1/4" union connection, smaking it suitable for a wide range of open and closed loop radiant heating, hydronic heating, hot water recirculation, solar & other applications.


  • Used in both closed and open loop systems;
  • Hydronic and fan coil heating;
  • Hot water recirculation systems;
  • Solar heating;
  • Radiant heating systems.


  • Built-in motor protection for longer life
  • Whisper-quiet operation;
  • Stainless Steel circulator body;
  • Engineered to meet the needs of residential hot water and heating systems;
  • UL/CSA listed

Technical Specifications:

  • Voltage: 115V;
  • Amperage: 0.42 Amps;
  • Hertz: 60 Hz;
  • Phase: 1;
  • Watts: 97W;
  • Max Pressure: 145 psi;
  • Max Temperature: 230F;
  • Min Temperature: 36F;
  • Flow Range: 0-20.5 GPM;
  • Head Range: 0-9.7 ft;
  • Horse Power: 1/6HP;
  • Body: Stainless Steel;
  • Connections: GU125 (1-1/4” Union);


2 years from date of installation.
UP15-29SU Stainless Steel Circulator Pump, 1-1/4" Union, 1/8 HP, 115V has an average 4.4 out of 5 rating based on 16 user reviews.
1 of 1 people found this review helpful.
It's a pump
By Verified Buyer on 3/10/2016
Drop-in replacement for my failed UP 15-18 SU (after about 15 years of recycle service).
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1 of 1 people found this review helpful.
Easy install and great price
By DIY Homeowner (from San Jose, CA) on 3/9/2016
Easy to install when following Grundfos YouTube videos (albeit for a different model). Perfect replacement for older, discontinued model: UP 15-18 SU. Worked as expected, not quite silent, but not noisy either. Hope it lasts!
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Works just as I had hoped
By Rob J. (from Potsdam, NY) on 9/25/2016
I agree with all of the other positive reviews. My pump arrived quickly with no issues. The only minor issue was the electrical connection box came with only 1 screw but needs 2 to secure it to the pump housing. No big deal and probably an issue for Grundfos to correct. I found the pump very easy to install and it appears to be working just fine for me.
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Really happy
By Mitch, Plumber (from Los Angeles,CA) on 8/16/2016
Really good pump. Quite, no vibrations. Came in all original box, untouched, unopened, simply brand new! Works as Swiss Watch
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This unit is awesome
By Colin (from Charlotte,NC) on 5/19/2016
I installed this with a recirc system last year with a timer and temperature thermister. This unit has been flawless and is quiet its so nice having hot water almost instantly at every faucet without wasting gallons. My water bill and electric bill have dropped substantially. I was nervous thinking I would hear the pump but it sits downstairs with the water heater and is close to silent.
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Excellent product for my solar hot water system
By Verified Buyer (from Sarasota, Fl) on 4/5/2016
Arrived on time, was easy to install and I am now back to free hot water! Much quieter than the old pump that this replaced.
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works as expected
By Solar Pro (from Boulder, CO) on 7/7/2015
fast delivery
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Works Great!
By Solar Installer (from San Diego, CA) on 5/19/2015
Delivered quickly.
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By richard r. (from tampa,fl) on 10/16/2012
The pump was delivered as promised and installed within two hours. My hot water solar panel was up and operating again. Very easy installation. The price was almost half what a local dealer wanted!!!!
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Ground foa up15-29su
By alves (from Sebastian fl) on 10/9/2012
The pump was here in 3days an the service was great Very easy to installed thank you
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Packaging Issues
By David (from Marshall, MI) on 2/19/2012
This is the 3rd Grundfos pump in a row I've received in an unopened, undamaged package that had damaged spring terminals and / or other damage. I asked Pexunivers to check the pump before shipping to ensure it was in one piece before being shipped. Obviously they didn't. Maybe the great prices from Pexuniverse are because they buy damaged seconds from some junk warehouse and don't tell their customers. What ever the reason, beware of the merchandise you get. Examine it the day it is received as FedEx only gives you 2 days to report damage and still get free shipping back. Rating is a 3 because the pump works and Grundfos makes good pumps but their package results in damaged products after shipping.
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Grundfos pump
By ED (from ok.) on 12/28/2011
I just installed the pump very easy & very quiet I would recomend this pump.
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Do Not buy this pump
By Stan (from Wyoming) on 12/15/2011
The largest union sold to fit this pump is only 3/4 inch, while the ID of the pump inlet and outlet is 1 inch. Makes no sense, and no help from the company.
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By gordon (from garfield,NJ) on 12/11/2011
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This is the best
By Jesse (from Phoenix, AZ) on 11/4/2011
"I installed a hot water circulator pump, with a NEW dedicated return line, back to the COLD water inlet of my water heater. A Grundfos pump was install in my last home and I was told this is the best pump made. After 10 years of non-stop trouble free use, in my old home, I only wanted a Grundfos in my new home. This Grundfos UP15-29SU Model allowed me to install the pump at the HOT outlet of the water heater with the 3/4"" Threaded Bronze Grundfos Pump Union Set #GU125 (that I bought at the same time) very quickly and with ease, using just a third part (one 3/4"" nipple) back into my old flex pipe that I just removed to install the pump on top of my water heater. This Stainless Steel Grundfos Pump is a beautiful piece of quality and PexUniverse.com as all the research available to pick the best style pump for your intended purpose along with the required Grundfos connection parts. Now my new home has HOT water at the bath/shower and sinks with-out the LONG wait and waste of running all that cold water down the drain."
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super qiuet
Pump is compatible with old style timer.
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This Grundfos UP15-29SU Stainless Steel Circulator Pump, 1-1/4" Union, 1/6HP, 115V (59896775) can use for food application?
Read 1 answer
0 of 1 people found this answer helpful.
The short answer to your question is no. Although Grundfos stainless steel circulator pumps are safe for handling domestic water, they are intended for use only in hot/cold water recirculating heating or cooling applications (such as radiant floor heating).
Answered on 10/18/2012 by PexUniverse Customer Service
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