Please enter the email address associated with your account and we will send you a link to reset your password.
Your password reset link is on its way. If you have problems accessing your account, please contact us at 888-757-4774 and we'll help you out.
I'm sorry, your email address was not found in our system.
If you think this is a mistake, please contact Customer Service at 888-757-4774 or email us.
Location: 185 Price Parkway, Farmingdale, NY 11735
Hours: 8:00AM - 7:00PM, Mon - Fri.
This product does not comply with the "Safe Drinking Water Act,"
which requires that products used in any system providing water for human
consumption (drinking or cooking) to meet low-lead standards.
Please check the box below to confirm you are aware of that this item is for non-potable water applications only.
This product will NOT be used in the installation or repair of a potable water (human consumption) application.
You must agree to this statement in order to purchase this product.
Do not use this item for any installation or repair of potable water applications.
This product does not comply with the "Safe Drinking Water Act,"
which requires that products meet low-lead standards in order to be used in systems providing water for human consumption (drinking or cooking).
This item is for non-potable (non-human consumption) water applications only.
We accept returns of any unused and unopened merchandise within 5 days of receipt and accept returns of defective merchandise within 14 days of receipt. All returns must be accompanied by a Return Goods Authorization, which may be obtained by contacting a customer service representative either by phone or by e-mail. All manufacturer warranties are honored and claims should be made through SupplyHouse.com.
See full Return Policy.
Add this item to your cart to calculate shipping cost.
The entire staff at SupplyHouse is committed to doing everything we can to ship your order out accurately and as quickly as possible. Most orders ship within 24-48 hours and expedited orders go out the same day when placed before 3:00pm EST. If an item is back ordered for any reason, you will be notified via e-mail. Please note in the special instructions at checkout if you need receive your order by a specific date.
See full Shipping Policy.
SupplyHouse.com is committed to providing you with the highest quality products at the lowest prices available. We are committed to competitive prices and will honor our Low Price Guarantee if you find an identical item at a lower price.
For complete information on our low price guarantee, go here.
There is a Minimum Advertised Price (MAP) allowed by the manufacturer on this product. Add item to cart for lowest price.
We are dedicated to protecting your order information. Because of this, all personal data that is transmitted through our site is encrypted using SSL or "Secure Socket Layer" technology which encrypts your order information to avoid the decoding of your information by anyone other than SupplyHouse.
At SupplyHouse.com, we are committed to protecting your privacy. This means that we will not distribute, sell or rent your name or personal information about you to any third party without your permission.
For complete safe shopping information, go here.
Your privacy is of great concern to SupplyHouse. We use the information you provide to process your order and to ensure that your experience on our site is as enjoyable and efficient as possible. Our primary focus and greatest concern is you, our customer. We respect your privacy and therefore do not sell, rent or loan any of your personal information to any third party.
We are committed to protecting your privacy. We use the information that we collect about you to process your orders and to provide a personalized shopping environment. When you purchase products from SupplyHouse.com or register for any SupplyHouse.com services, we automatically place you on our list to receive e-mail updates about special offers, new products, and new services.
A credit card Identification Number is an added safeguard for your credit card purchases. Depending on the type of credit card you use, it is the 3- or 4-digit number printed on the back or front of your credit card. For most online credit card purchases from us, the Identification Number is required information.
MasterCard: Your identification number is the 3-digit number found on the back of your credit card near the signature panel.
Visa: Your identification number is the 3-digit number found on the back of your credit card near the signature panel.
American Express: Your identification number is the 4-digit number found on the far right on the front of your credit card.
Voltage, or volts, is a measurement of the difference between two electric fields (in heating terms, the difference between the Earth's electrical field and the electricity running through your wires).
Horse power is a unit of power, with one horse power equalling 745.7 watts.
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.
(based on 16 reviews)
of respondents would recommend this to a friend.
Most Liked Positive Review
Grundfos MQ3-45 Pressure Boosting Pump
This is the second house in which I have installed a Grundfos pressure pump. I live in a rural area and have a well and a large water storage tank in the basement. I...Read complete review
This is the second house in which I have installed a Grundfos pressure pump. I live in a rural area and have a well and a large water storage tank in the basement. I needed a pressure pump to increase the flow of water to a reasonable level. The Grundfos pumps have proved to be very dependable and quiet. Well worth the money. Other websites charge much more for the same model.
Most Liked Negative Review
Replacement Pump-so far, so good
This is our 2nd pump-our 1st one died after approx 4 yearswe have a cabin that requires the pump to push water approx 20 ft straight up (cabin is...Read complete review
This is our 2nd pump-our 1st one died after approx 4 yearswe have a cabin that requires the pump to push water approx 20 ft straight up (cabin is on a hill). while the pump does its job just fine (it kicks on every time you turn the water on, flush the toilet, etc), i am not sure about the life of the pump. The cost of this unit can range from $500-$800, depending on where u buy it from. At that price, most businesses selling this product consider it a "throw-away" item. However, for a home owner, this can be rather pricey to replace every 3-4 years. And not being a plumber and not knowing of another more reliable pump out there, i went with this product again. Like i said, works fine and does the job.
Reviewed by 16 customers
Displaying reviews 1-10
Back to top
Previous | Next »
Performs above expectations
By Lazy Lester
from San Pablo, CA
Comments about MQ3-45 Pressure Boosting Pump (115V):
I use this with an 1100 gallon rainwater harvesting system and I love it. I can pump water to anywhere on my property including up a hill to water citrus trees. All the rainwater I collect would not be near as beneficial without being able to deliver it to where it is needed efficiently and this pump does the trick with ease. Before getting this pump I relied on gravity to water my garden and when the water got low in the tank, the garden got thirsty. Not any more.
Bottom Line Yes, I would recommend this to a friend
Was this review helpful? Yes / No
- You may also flag this review
Love these little guys
from Seattle, WA
I actually use this as my well pump for my house. Its a very cheap and great way to give yourself lots of water pressure without spending $3500 on a pressure tank and pump. This is my 2nd Grundfos, the last one I had lasted 8 years, I will be buying another one in another 8 years too. I think it has the best price per gallon of water then any other pump I've found. Great value, great water pressure!!
from Colville Wa.
I use this pump for my day to day watering needs at my mountain residence. This pump is the most bullet proof unit I have every used. I recommend this pump to any one who needs a reliable, maintenance free, trouble free unit. I just purchased a second one for my home residence to switch over too, when our community well power is lost and run my back up 1200 gallon reserve tank system. The pump I have on the mountain has been in use for over eight years and during that time it has never failed me and is still going strong.
from sealttle, wa
Pump (MQ3-35) worked but not for long
from South Texas
I installed this unit 2.5 years ago,it worked great but not for long. I have used this unit as a booster pump for lower then wanted city water pressure of 48 psi. I paid 900.00 and some change for this unit thinking it would outlast the cheaper models. I am disappointed in its quality. I would recommend talking to some end users and find a unit that will last longer then 2.5 years. I did notice there were some units for 450+ on the net so your looking at a cost of 25-30 dollars a month on the average to use plus electricity to increase your water pressure.
Bottom Line No, I would not recommend this to a friend
from Glenwood Springs, CO
We have pretty low pressure City water at our home and had the older version of this pump installed 9 years ago to give us a much needed pressure boost. We purchased this new pump to replace it when it stopped working. We hired a plumber to remove the old one and replace it with this one, as the old one was installed with soldered copper pipe. The new one is much quieter, we don't hear it kick on like we did the old one, and it starts up pretty much as soon as we open a faucet or flush. We had to wait for the old one to kick in before we got a much needed pressure boost. We don't even notice the new one's running except we always have good water pressure. Perfect so far.
(1 of 1 customers found this review helpful)
GREAT CUSTOMER SERVICE
from Northwest Arkansas
This item is intended to be a back up pump in the event that the current pump breaks down. We live in a rural area and having this back up ready to go is literally a life saver.Dealing with Brian in customer service was one of the best retail experiences that I have ever had. Pex Supply furnished us with exact and timely information and their pricing was very competitiveThank You all.Barry
from Ridgefield. CT
I replaced a similar Grundfos pipe with a similar newer pump. SO far it works great. My first pump lasted 4 years, which in my opion is pretty bad. Grunfos customer service is horrible. PexSupply customer service was very good and I received my pump in two days.
best pump on the market
from Kingman Arizona
best if both inlet and outlet used swivel connectors for water connections
A nice booster pump
from Greybull Wyoming
I bought the Grundfos MQ3-45 booster. Its a great little pump and it was easy to install. Its been working great and has boosted me to just over 70psi.
Do you have questions about this product?
Get answers from real customers and in-house experts with AnswerBox.
Know the answer? Answer this question
Do you have a question about this product?
Subscribe to our Channel
Like Us on Facebook
Visit Our Blog
At SupplyHouse.com, our goal is to bring you the highest quality plumbing, heating and HVAC supplies at competitive prices. Our product catalog includes PEX Plumbing Supplies, Radiant Heat Supplies, VisionPro Honeywell Thermostats, Taco pumps and mini-split air conditioners. If there are items you are looking for but can't find on our website, please contact our Customer Service Representatives & we will do our best to find what you need.
© 2015 SupplyHouse.com