MQ3-45 Booster Pump, 1 HP, 115V


Brand: Grundfos

Mfr Part#: 96860195

Model: MQ3-45

UPC#: 570031208420

Availability: In Stock
Usually ships: within 1 business day
Qty Price
$506.95 / each & Free Shipping
  • Description
  • Literature
  • Reviews (19)
  • FAQs (3)

Grundfos MQ3-45 1HP Booster Pump (96860195) is a compact, all-in-one flow-based pressure boosting system, designed for domestic water supply applications. The Grundfos MQ3, with it's smart operation is both easy to install and reliable.

Grundfos MQ3-45 Booster Pump is ideal for pressure boosting from water storage tanks or from city water supply (maximum 45 psi inlet pressure) and is rated as high as 91.9ft of head. The Grundfos MQ3-45 is also a self-priming multistage centrifugal pump. It can selfprime from a well depth of down to 26 feet within a maximum time of 5 minutes.



  • Complete system;
  • Low noise;
  • Built-in protective functions;
  • Automatic reset;


Technical Specifications of Grundfos MQ3-45:

  • Voltage: 115V;
  • Liquid temperature range: 32 .. 95 F;
  • Rated flow: 13.2 US gpm;
  • Rated head: 91.9 ft;
  • Shaft seal: BVBP;
  • Maximum operating pressure: 109 psi;
  • Approvals on nameplate: UL,CUL;
  • Pump housing: POM + 25% glass fiber;
  • Impeller: PPO + 20% glass fiber-PTFE;
  • Range of ambient temperature: 32 .. 113 F;
  • Maximum operating pressure: 109 psi;
  • Pipe connection: 1" NPT;
  • Power input - P1: 1000 W;
  • Main frequency: 60 Hz;
  • Rated voltage: 1 x 110-120 V;
  • Rated current: 9.2 A;
  • Enclosure class (IEC 34-5): 54;
  • Insulation class (IEC 85): B;
  • Length of cable: 6.56 ft;
  • Type of cable plug: NEMA;
  • Net weight: 28.7 lb;
  • Gross weight: 34.2 lb;
  • Shipping volume: 1.94 ft3;
MQ3-45 Booster Pump, 1 HP, 115V has an average 4.8 out of 5 rating based on 19 user reviews.
1 of 1 people found this review helpful.
good pump
By vbub101 (from Decatur Tennessee) on 10/31/2011
This makes my second Grundfos pump the last one lasted six years before it started messing up.
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MQ3-45 Pump
By Mark (from Vancouver WA) on 2/4/2016
Great pump. Workhorse. 1st pump ran for 7 years without fault and minimal maintenance...Great Product.
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Best Pump Ever!
By Wiley Coyote (from SB, CA) on 9/15/2015
This is my 2nd one in 10 years. 1st one is still going strong, outdoors after 10 years...incredible! My community needed water pumped 120ft up to cistern and the well pump couldn't quite get it there. Engineers told us we needed a very expensive pump (over $2k) + hold tanks and special valves... So I told them about the MQ3-45 and we ordered it, installed it halfway up the line and bingo! 15GPM into the cistern all day long! The thing doesn't know how to fail. Highly recommend
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Water Booster Pump
By Verified Buyer on 8/20/2015
This is my 2nd Grunfos pump. I recommend getting the cover if exposed to weather. One of the best water booster pumps made. Great quality at great price.
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Good product
By Don (from Texas Hill Country) on 7/14/2015
This is a direct replacement for the same model that only lasted 3 years. May be due to power surge knocking out run capacitor. Replacement parts for these units are near impossible to locate, but the product is very simple and easily replaced with another unit. Hope to have one for a spare if the old unit can be repaired. Will be very handy. Was a bit disappointed in the delivery taking over a week from order date when it was quoted as 2-3 days. Was entirely without water during this time.
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grundfosmq3 pump
By Rudy R. (from CA) on 11/4/2013
This is the third pump I have used and so far the best. I had it installed professionally but after watching the pro do it I''m sure anyone can.Rudy Resendez
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By Ruth D. (from Chelan, Washington) on 5/31/2013
came in the mail when said, love having water pressure again, easy to install, and price was better than any where else, excellent very happy with the results.
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Works great!
By Rod K. (from Ripon, CA) on 3/23/2013
I received the MQ3-45, and installed it to resolve my low water pressure from my city connection. My lawn sprinklers would not work properly using the city water, but they work fantastic, now that I've installed the Grundfos MQ3-45!! The pump was easy to install, and works as advertised...wish I had done this a long time ago. Thanks.
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By Paul S. (from Middletown RI) on 7/28/2012
Had my first pump installed in 2006 by professional. Two months ago it started stopping intermittently. I called Grundfos, spoke to a plumbing supply company and no one could actually tell me how to trouble shoot it or what may be wrong. It was answers like, I think it may be this or that.I found a pump at (what a great company) for $418 with no tax and free shipping. It was delivered the next day and I had it installed in 15 minutes.I anyone needs a pump for parts, let me know.
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Good while it lasts
By Dean R. (from Coupland, Texas) on 4/9/2012
I just purchased my 2nd Grunfos MQ3 in a 10 year period. Actually my 3rd pump (Grundfos replaced my 1st one free of charge due to a pressure switch issue covered under warranty).This pump works very well with my rain water collection system which services the entire house. It is very easy to install and runs flawlessly......until it dies, which you should expect after around 5 years.
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Great pump!!
By jaymac15 (from Philadelphia, PA) on 2/2/2012
Changed my old pump out for this new Grundfos, wow wha a difference! it's so quite, has a faster response time to fluctuations in pressure. My shower no more trickles its a waterfall. I actually have no bad things to say about this product. Thanks John
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By JEFF DAPLUMBER (from CHICAGO) on 1/17/2012
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Easy to install and works well.
By John (from Livonia, NY) on 1/8/2012
I'm using this pump in a home that is on a village water supply but the water pressure was only 32 psi. I also installed a water pressure control valve in front of the pump to be able to adjust the output pressure from the pump. This combination worked well.
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So far So good
By Drag Racer (from Bethlehem Pa.) on 11/30/2011
When they say "plug and play" they mean it. Simple to install. Much quieter then previous pump
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Highly recommend!
By Rich in Austin (from Austin, TX) on 10/17/2011
The Grundfos MQ3-45 is a great inline pump. I"m using it to provide water from my rain water collection tanks to my pool and house. I have the pump near the tanks with more than 200 ft of 1" pipe to the house and pool. It's no problem for this pump which delivers 60+ psi water pressure no problem. It's easy to hook up and run and very quiet. The auto off feature is also nice for maintaining pressure and protecting against running dry. The only feature its lacking is the ability to control the water pressure level from the pump itself. I'm using an external pressure regulator. Ordering from PEX was easy and fast!
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I highly recommend this pump
By Osprey (from Puerto Penasco, Sonora, Mexico) on 9/26/2011
This is our total house water pump from our 5K L underground tank and it works great.Our special hydro pressure R/O system can keep it busy till the R/O tank fills after use but once I figured out why the pump was going on 12 sec. off 60 sec.and repeated, no problem.Looking to have years of trouble free service.
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Great pump, price, fast shipping
By John W. (from Scotts Valley, CA) on 9/19/2011
This is 2nd pump. First one ran house flawlessly 5 years 24x7. Think the pressure sensor is faulty or needed service. Bought this as backup and will get first serviced.
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Booster pump 1 hp Grundfos MQ3-45
By Tim (from Centerville Ga.) on 7/2/2011
[...]The pumps works excellent I have three showers in my house and it keeps the pressure up while everyone gets a shower. My city pressure was about 30 to 35 psi.Now I have a solid 65 psi and above. I installed the pump in same room as my washing machine. It runs very quiet when I shut the door you can bearly hear it. Its great to take a good shower I have a double headed shower nozzle now.
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Grundfos mq pump
By Greg the homeowner (from Arlington, washington) on 6/12/2011
Easy to install for the simplest mind. Boasts excellent pressure. Extemely reliable for the past 4 years. Quiet and small. Plumbers hate this thing cause it saves the homeowner tons of money and problems.
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will there be water flow if the power goes out?
Read 1 answer
Answered on 5/15/2015 by PexUniverse Customer Service
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I have an MQ3-45 pump installed to boost my water pressure. The pump worked fine until winter when I turned on my whole house humidifier. It is low flow and causes the pump to short cycle. It turns on for approximately 5 seconds and off for about 60 seconds. Is there an adjustment to correct this?
Read 1 answer
If you can limit the water supply to the humidifier so that it's under 0.3 GPM, the pump will not turn on. Otherwise you'll need to install an in-line well tank (such as Well-X-Trol by Amtrol).
Answered on 12/27/2013 by PexUniverse Customer Service
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Is this mark III version?
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Answered on 12/10/2013 by PexUniverse Customer Service
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