was working. Lowered it into the ground and it worked fine until yesterday. It has been maybe 3 weeks since I had turned it on and it is not working. So I have pulled it out again. Before I get a new one I would like to know whether they cn be fixed. The pump man I had out this morning said no, get rid of it!
MQ3-35 3/4 HP Pressure Booster Pump
Experienced gardeners share their insights in answering this question :
I’m not fimular with this pump but if you can spin the impeller (propellers are on airoplanes) and the motor will start and run it could be a start capicator. This stores elect. and gives the motor a bump in power to start.This will usually be found in or around the wireing box on the motor and should cost about 20.00- 30.00 dollers. You will need to find a service manuel for your pump and the motor that drives it. Good Luck with it, sorry that’s all the help I have on that one..
How to Identify and Fix Common Gardening Problems ?
We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :
Its replacement is the MQ Successor 3-45, an “on demand” pump that offers slightly higher flow/pressure performance and better functionality.
The pump will not restart after an alarm/fault. The Auto-reset function can be activated/deactivated by press- ing the on/off button for 5 seconds. Note: When water is consumed, the pump will start and stop automatically, whether the Auto-reset light is on or off.
Grundfos manufacture shower pumps in the Brass range that are Universal, meaning that the pump will work automatically in either a positive or negative head installation. * Recommended minimum flow rate: 5 l/min.
Motors supplied by Grundfos
We recommend to protect all other motors against voltage peaks higher than 850 V. The above disturbances, that is both increased acoustic noise and detrimental voltage peaks, can be eliminated by fitting an LC filter between the frequency converter and the motor.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
I have a grundfos pump for my bore. It stopped working a few of months ago and we pulled it up, gave the propella (?) a spin. Tested it and it was working. Lowered it into the ground and it worked fine until yesterday. It has been maybe 3 weeks since I had turned it on and it is not working. So I have pulled it out again. Before I get a new one I would like to know whether they cn be fixed. The pump man I had out this morning said no, get rid of it!
ANSWER : I’m not fimular with this pump but if you can spin the impeller (propellers are on airoplanes) and the motor will start and run it could be a start capicator. This stores elect. and gives the motor a bump in power to start.This will usually be found in or around the wireing box on the motor and should cost about 20.00- 30.00 dollers. You will need to find a service manuel for your pump and the motor that drives it. Good Luck with it, sorry that’s all the help I have on that one..
I have a pressure booster pump installed which turns on automatically when we open the tap and turns off by itself when we close the tap, but when power goes and comes back(common in india), the pump will turn on even with no tap opened and does not turn off automatically and goes on running, some kind of airlock problem I think, when we just shut off and on water input several times, it again starts working well
ANSWER : Check to see if the output pipe has water in it when the pump swutches off the pump needs to be primed at all time what we normally find cases like this is the pump is higher than the supply or there is an air pocket on the output where the pressure sensor is
Couple of guys tried to help me on this, perhaps you guys could come back. I forgot to mention there is a pressure tank bladder type on the discharge side. Could the air in this tank be messing with the prime. I checked the intake. It has water in it after bleeding air from the discharge system where before it was dry before purging air. I think there is air in the system and wonder if it is coming from the pressure tank?. i open up one of the discharge valves and a lot of air comes out. Should I put a valve on the pressure tank to take it off line until I get water from the well?
Mar 12, 2010 – Could it be the check valve? I took it off and the flap appears to be working correctly. This well has been here a long time. Never given me any problems. I do have galvenized couplers on the discharge and intake sides. Old. Could these be leaking even though they show no sign of water? The discharge is able to hold 30 pounds easily overnight. I do not hear any vacuum in the intake when I take it off. Could the pipe to the well have a leak? I know I would have to insert a sleeve but I do not want to go through the hassle if I do not have to. I had put on a brand new pump from the hardware store that did the same thing so I think that would elliminate the pump as being the problem.
I disconnected it for the winter and rehooked it up. The galvanized couplers on the discharge and pump side are old but do not appear to be leakeing as I taped them well. The check valve seems to be functioning well as I took it off and the flap works correctly. The well is not pulling water. there does not appear to be a vacuum on the check vale when I losen it. could the check valve be bad? I am aware I might have to resleeve the well, but do not want to hassle with this if I do not have to. I want to eliminate everything else first. i put another brand new pump on it to see if it was that. That partiuclar pump which was the same thng did not work either.
I took the pump nose off and looked at it. The one way valve appears to be working fine. The impeller is working fine also evidenced by when I turn it on witht the discharge cap off, water shoots out. When I open one of the discharge valves and turn it on, the pressure drops to 10lbs. At this point the prime water has moved through the pipe and and the pump does not soound like it has any water in it. I pull the cap off and have to “reprime it again.” It again goes back to the pressure gauage rapidly fluctuating while pump on. I disconnect pump on intake side I hear no vacuum. The guage is on the discharge side. The seals on the pump nose do not look frayed or damaged. The pump is not leaking water in any of the joints. The pipes on discharge and well side do not appear to be leaking.
ANSWER : My friend, please boil your question down. Your title has to do with riding mowers but the leaking, bladder, impeller, air bubbles, pressure tank, check valve comments seem to be migrating toward a pump of some kind – well? spa? pool? irrigation?
Briefly, any system that involves a water source, a water moving device, water storage device and ultimate useage is subject to leaks … into the system and out of the system. If this is a well and you have air in your system, your pump may be sucking air at the well or any loose connection between the tip of the pipe and the inlet to the pump. Your bladder could have failed but from what I can get from your comments, this is not the case. On the pressure side, neither air nor water will leak in … only out.
Please recheck all connections. Make sure your check valve is installed correctly and not leaking. The check valve assists the foot valve, which may have failed.
I am more inclined to think your well may be at the end of its useful life. To prove or disprove, you could have a plumber put a vacuum gage on your pump. He or she can answer this question is about 90 seconds based on this test. Expect to pay for one hour of time, which will be less than the time you have already invested in your project.
Grundfos MQ3-35 hums loudly and does not pump. Alarm light does not go on. Pump seems “happy” but when a tap opens and the pump turns on, there is no boost in pressure and the pump just hums loudly… definitely a different noise from normal operation. Seized? Vapor lock? Any help is greatly appreciated.
ANSWER : Hi, seems like the capacitor gone bad or a seized motor. I just fixed mine cranking the motor manually with the use of a flat head screwdriver. In the back of the motor there is a rubber plug about the size of a dime. Take it off an insert a long flat-head screwdriver and crank the motor clockwise a few turns. Remove the screwdriver and try to operate the pump as usual. Good luck …
Why does my Grundfos MQ water pump keeping kicking on, even when there is no water demand?
ANSWER : Is it newly installed or has it been working for a while till you noticed it?
The pump alarm light is on and there is water in the tank and nothing has changed, just stopped working. Have used the bleeder and water shot out and now will not work at all. Any suggestions
ANSWER : Press the on/off button once to reset the alarm and once again to start the pump.
If the auto reset light is on, the pump will attempt to restart in 30 minutes.
If the auto reset light is off, press and hold the on/off button for 5 seconds.
Gary
Pump leaks from the bottom after running, is this normal?
ANSWER : No . the problem is that the ceramic seal that seals between the fluid and the motor and bearings is leaking ( probably from running dry) or the rubber that holds the carbon seal insert has a crack. Suggest you pull the pump down to fix it otherwise the water/ fluid will get into the bearing of the motor and will cause a major failure
Grundfos MQ 35
ANSWER : Check the capacitor or the centrifugal switch.
