Model # 96860172

Internet #204317249

Grundfos MQ3-35 3/4 HP 115-Volt Pressure Boosting Pump

Grundfos

MQ3-35 3/4 HP 115-Volt Pressure Boosting Pump

$535.46 /each

Frequently Bought Together

Product Overview

The Grundfos MQ is a compact, all-in-one, flow based, plug-and-play pressure boosting system, designed for domestic water supply applications such as homes, cabins, cottages, farms as well as gardens. The pump is suitable for pumping of potable water and rain water. The MQ, with it's smart operation is both easy to install and reliable. The MQ is a complete, all-in-one unit, incorporating pump, motor, diaphragm tank, pressure and flow sensor, controller and check valve. Built in safeties ensure long life of the pump. These safeties include: dry running; excessive temperature; any overload conditions. The MQ is a self priming pump and needs no priming other than that at installation. The MQ is a plug-n-play system.

  • Complete system
  • Low noise
  • Built-in protective functions
  • Automatic reset
  • Compact, easy to install
  • Rated flow: 13.2 U.S. GPM

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.

Specifications

Dimensions

Details

Warranty / Certifications

More Products With These Features

Search

Customer Questions & Answers

11 Questions12 Answers

Customer Questions & Answers

MQ3-35 3/4 HP 115-Volt Pressure Boosting Pump
MQ3-35 3/4 HP 115-Volt Pressure Boosting Pump

Ask your questions. Share your answers.

 
 
Clear Search Term
 
 
Sort By:
 
2 answers

inlet pressure

This question is from MQ3-35 3/4 HP 115-Volt Pressure Boosting Pump
Asked by
edison n.j.
Read all my Q&A
April 10, 2015
should I use a pressure regulator on the suction side, local codes require a max. discharge of not more then 80 psi for domestic use ? also the suction side of the city water connection is 3/4 in.. will reducing to that size cause any problems ? the water lines in the interior of my home are 3/4 to 1/2 inch. I know I can't change the volume, will the pump maintain the pressure when more then 1 outlet is opened thank you
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (2)

May 22, 2015
Answer: 
Dear Valued Home Depot Customer,
We reached out to MFG for more information and below is their response.
“ call 1-800-955-5847 to contact Grundfos "
Thanks
The Home Depot User Generated Content Team
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Read all my Q&A
April 27, 2015
Answer: 
I don;t quite follow your question and don;t want to give you bad info. So please call and we can discuss your specific need,. Chris 1 978 651 3301
-1point
0out of 1found this answer helpful.
Was this helpful?helpful0unhelpful1
 
1 answer

I currently have the my3-45,can I switch to 3-35 and still get good pressure? What's the difference between the two?

This question is from MQ3-35 3/4 HP 115-Volt Pressure Boosting Pump
Asked by
Read all my Q&A
September 5, 2016
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answer (1)

Asked by
Read all my Q&A
September 6, 2016
Answer: 
The MQ3-45 does have a more aggressive pump curve than the MQ3-35.
So depending on your application and its variables, it may be possible to move down to this model, it also may not. This pump is used for a variety of applications; as a pressure booster and as a shallow well pump. If you would like to give me a call I would be happy to discuss your specific applications. Chris 978 651 3301
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
 
1 answer

Why is the maximum flow only 22 gallons per hour.? It this a typo, and it's really 22 gallons per minute?

This question is from MQ3-35 3/4 HP 115-Volt Pressure Boosting Pump
Asked by
grants pass, oregon
Read all my Q&A
August 27, 2016
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answer (1)

Asked by
Read all my Q&A
August 29, 2016
Answer: 
Good catch. You are correct it is 22 Gallons per minute at 0- 10 feet of head. The Home Depot system wants things in Gallons Per Hour and the person who entered this forgot to do the math. I will fix it now and thanks for the correction.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
 
1 answer

I have poor water pressure throughout my house, except when I use a high-pressure washer

This question is from MQ3-35 3/4 HP 115-Volt Pressure Boosting Pump
Asked by
Worcester, MA
Read all my Q&A
June 25, 2016
My house is about 25 years old, built to code, and has always had weak water pressure. If someone is taking a shower, don't flush a toilet! Also, the pressure is better downstairs than upstairs.
We've learned to live with it, but recently using a gas-powered pressure washer, I got to thinking: the pressure washer did fine, as strong a flow as expected, plenty volume. So I wonder if that describes a pressure problem, and whether a pressure boosting pump is the solution? I read one of the other answers, and will do the pressure test and gallons per minute test as well.

And as long as I am asking, do these pumps just work on demand? Are they noisy? Are there combination pumps with filters? My coarse-grain house filter is ready for replacement. I will likely pay a plumber to install.

Thanks
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answer (1)

Asked by
Read all my Q&A
June 27, 2016
Answer: 
I just read your question and I am so glad you read my other response about pressure vs volume as I thought I was going to have to repeat myself. In the right application these pumps can be a relatively inexpensive fix. They sense the flow and spin up adding 45PSI. I would not call them silent but I would not call them noisy either. Call me when you know your pressure and flow. We can discuss your Read More
I just read your question and I am so glad you read my other response about pressure vs volume as I thought I was going to have to repeat myself. In the right application these pumps can be a relatively inexpensive fix. They sense the flow and spin up adding 45PSI. I would not call them silent but I would not call them noisy either. Call me when you know your pressure and flow. We can discuss your specific need. However I will say that I find it highly unlikely that you have a pressure differential in your home. I think you will find that you have constant pressure but different flow rates do to changes in pipe size and a limited incoming flow rate. I had a local customer who could not take a satisfying shower. In the end his pressure was find. His ancient water main had rusted almost shut. So the water was coming through a space the size of a straw in the center of a corroded pipe. The city wanted $5000 to change it but when if breaks they will replace if for free. He did not have the money. As his pressure was find he added a well tank. This is a storage tank with a diaphragm in the center. The city system fills this tank and stores the water under pressure. Now when he takes a shower he is using a combination of stored water and incoming water. So he can take a shower that works. After about 10 minutes the storage is empty and he is back to just incoming water. But this solution, without a pump has made it good enough. Chris 978 651 3301 Read Less
+2points
2out of 2found this answer helpful.
Was this helpful?helpful2unhelpful0
2 »
  • 2016-10-31 T01:56:38.177-05:00
  • bvseo_lps, prod_bvqa, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasquestionsanswers
  • loc_en_US, sid_204317249, prod, sort_default
2 »
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 49ms
  • QUESTIONS, PRODUCT

Customer Reviews

MQ3-35 3/4 HP 115-Volt Pressure Boosting Pump is rated 3.8 out of 5 by 4.
Rated 1 out of 5 by from Buyer Beware - Bad Pump! Original MQ-35 pump lasted 8+ years, was a great pump! Replacement lasted only 4 months of light residential duty than started leaking. 3rd replacement leaked within 48 hours. Must have had a bad run on shaft seals. Can't keep installing this pump until they resolve the issue. Customer service is limited, website requires email and than wait for response, unacceptable. Can't currently recommend this product, unfortunately had to go with another manufacturer.
Date published: 2016-10-12
Rated 4 out of 5 by from Paid new for used I opened the carton to find the unit was previously used. The owners manual had notes in the margins and areas hi-lited. The unit works ok. I just was very disappointed to pay full price for a unit that obviously was not new.
Date published: 2016-09-27
Rated 5 out of 5 by from Works Great! I have been using these pumps for about 8 years now and they seem to be the most dependable for the price. Great product and easy to install. In the past i have changed things around and needed replacement parts and it was easy to get them though the manufacturer. We have one pump that feeds our entire house with no issues, the rest of our applications are in the workplace and are running at high demand with no issues at all. Pricing at the Home Depot was cheaper then our commercial account at the local plumbing supply chain. This is a great product, and i highly recommend it.
Date published: 2016-05-24
Rated 5 out of 5 by from Awesome pump! VERY easy install! No plumber needed with the help of a couple 1 inch shark bite metal water hoses with 1 inch female threaded ends!
Date published: 2015-10-27
  • y_2017, m_1, d_22, h_23
  • bvseo_bulk, prod_bvrr, vn_bulk_0.0
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_4
  • loc_, sid_204317249, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 38ms
  • REVIEWS, PRODUCT