MQ3-35 Booster Pump, 3/4 HP, 115V


Brand: Grundfos

Mfr Part#: 96860172

Model: MQ3-35

UPC#: 570031208419

Availability: In Stock
Usually ships: Today, if ordered by 3pm
Qty Price
$540.95 / each & Free Shipping
  • Description
  • Literature
  • Reviews (11)
  • FAQs (3)

Grundfos MQ3-35 3/4HP Booster Pump (96860172) 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 MQ3-35 Booster Pump is ideal for pressure boosting from water storage tanks or from city water supply (maximum 45 psi inlet pressure). Grundfos 96860172 is rated as high as 72.2ft ft of head. The Grundfos MQ3 is also a self-priming multistage centrifugal pump. It can self prime 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:

  • Voltage: 115V;
  • Liquid temperature range: 32 .. 95 F;
  • Rated flow: 13.2 US gpm;
  • Rated head: 72.2 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: 830 W;
  • Main frequency: 60 Hz;
  • Rated voltage: 1 x 110-120 V;
  • Rated current: 7.2 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 lbs;
  • Gross weight: 34.2 lbs;
  • Shipping volume: 1.94 cu. ft;


2 year manufacturer's warranty.
MQ3-35 Booster Pump, 3/4 HP, 115V has an average 4.7 out of 5 rating based on 11 user reviews.
2 of 2 people found this review helpful.
Great pump & Great company
By Hilltop (from Tennessee) on 10/1/2015
We have owned at least 4 of these pumps over a number of years. They do a great job with no problems.
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2 of 2 people found this review helpful.
Exaxtly what I wanted
By Jojo (from Lebanon, TN) on 8/1/2011
This pressure booster pump is used to increase our water pressure up the hill to our house. It does a great job. In fact, I plan to order another to use at the barn.
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1 of 1 people found this review helpful.
Best pump for the money
By Kevin McDermott (from Puerto Penasco ,Mexico) on 11/17/2015
The first MQ3-35 I had for 8 years with no pressure tank. I now have a pressure tank and a new MQ3-35. I'm guessing 12 years.
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1 of 1 people found this review helpful.
Quiet Pump
By Travis (from Columbus, OH) on 9/17/2012
Pump lasted for around 5 years (used in the 3 level home). The pump is quiet and set up is easy as long as it will work with existing plumbing. The pressure difference in my home is about 30 PSI.
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Great Pump
By Mel (from Concho, AZ) on 4/12/2015
Great pump...sturdy, quiet, efficient - and very easy to install. My second....third for this property.
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This pump delivers as promised!
By Happy PA homeowner (from Langhorne, PA) on 9/30/2014
I first purchased this pump eight (8) years ago to boost our home water pressure. My original pump finally died after 8 yrs. of hard use in a three level home plus feeding our outside landscape watering system. It is a truly great little package that delivers as promised. I strongly recommend this pump to anyone who needs to increase their water pressure.
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Have order many of these...
By LY (from Medicine Park, OK) on 8/21/2013
Our company has ordered multiples of these over the last couple of years and it's a great product.
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It makes such a difference.
By Steven P. (from Longmont, CO) on 3/21/2012
Excellent product and easy to install. I am planning to install one of these in my house in Mexico and can't wait! Currently water is delivered to the various bathrooms, etc. via gravity from our roof, which we have to fill every few days, and soon we will be able to pump directly from the large storage tank on the ground.
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Worth the money
By PT (from Geneseo IL) on 1/23/2012
I had a Harbor Freight booster pump and it lasted 4 months for $140.00. It had female pipe hook ups that I had to reinforce with hose clamps. It delayed twice as long as the Grunfos pump, was noisier than the Grundfos pump and did not provide the flow even though it advertized more flow than the Grundfos.
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Just What I ordered!
By JM (from Northern British Columbia, Canda) on 1/3/2012
"I bought the pump because the water pressure in my home would not run two showers at the same time. I also put in a new toilet that used the water pressure to assist so it was a perfect. Easy to install and I am Cdn so I picked the pump up at the border saved some U/S Pesos so to speak. Best Christmas present I have every given myself."
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0 of 2 people found this review helpful.
By Joe the Pump Doctor (from Oak Rigde,NJ) on 9/25/2011
There was a time, you saw the name Grundfos, that meant quality.It pumps very well. The problem is the intake and discharge have plastic fittings that crack no matter how careful you are installing it. To make matters worse,replacement parts can not be found, or at least the retailers and service stations can't be bothered. they would rather you just spend another [$] for a new pump. I did manage to fix my pump with a hose clamp and some plumbers tape. All I can say is buyer beware.
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I have 28 psi incoming pressure now. If I install this MQ3 pump, what will the shutoff psi be?
Read 1 answer
The pump adds 40 psi to inlet pressure, so 28 psi (inlet) + 40 psi (boost) results in 68 psi outlet pressure. The actual pressure at the faucet will be less depending on the piping length and elevation (see page 49 of the manual for pump curve).
Answered on 12/27/2013 by PexUniverse Customer Service
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In my shower I have four body sprayers using 2gpm and an overhead using about 3gpm. I have a 3/4 inch supply line to the shower. Will this unit be able to run all the heads at the same time.
Read 1 answer
GPM-wise, the pump will be able to deliver the flow required (pump rated for 13GPM, you need 11GPM), however if the whole system is supplied by 3/4" line, you may need to increase it to 1" for pressure drop considerations.
Answered on 4/1/2013 by PexUniverse Customer Service
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Hi, I have a submersible pump and pressure tank in a well pit 200 yds from my house, if I put this pump in my basement to boost pressure will there be a conflict with the other pump. Also the line is 3/4" can I just adapt it to fit the 1" fitting on the pump or must it be 1" line.
Read 1 answer
1 of 1 people found this answer helpful.
The MQ3 series will automatically adjust the pressure and will not conflict with your main well pump. If your line is 3/4", we would recommend to increase it to 1" for pressure drop considerations.
Answered on 12/5/2012 by PexUniverse Customer Service
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