I live in the country and have a 1400 ft water line 1-1/2" diam. feeding my MQ 45. I have pumped water through the line with a gas powered pump and it works fine but my MQ 45 doesn't want to pump anything. The pump would not be pulling any more than about 20 ft elevation...is there too much friction between the water and the pipe over the 1400 ft?

SOURCE: With the water running the MQ pump runs intermittently

This is a problem with your bladder in the pressure tank or the pressure switch. Ether one will produce this cycling on and off. Good luck.

SOURCE: grundfos mq3-45 pressure booster pump

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SOURCE: Pump is MQ3-45. In use

CHECK AND SEE IF THERE IS A RESET BUTTON ON MOTOR PUSH TO RESET.
THIS BUTTON SHOULD BE RED.

SOURCE: Ok at the place I

Ok let me ask a few questions. 1.You said U have A 1HP Sub. It pumps from about 300'. How did U get this info? 2.Now the water goes into A 120 Gal storage Tank from the top,then goes out from the bottom. Is Tank A Plastic or Galvanized/PSI Tank. OK NOW.BASED ON THE INFO THAT U PROVIDED.ON THE ISSUES THAT U R HAVING. IT SOUNDS LIKE YOUR TANK IS WATER LOGGED. WHAT THAT MEANS IS.YOUR TANK IS FILLED TO THE TOP WITH ONLY WATER. SO THE ONLY TIME U GET PRESSURE IS WHEN THE PUMP TURNS ON. NOW TO FIX THIS WATER LOGGED TANK PROBLEM.ALL U NEED IS AIR. SEE WHEN THERE IS AIR IN THE TANK & THE PUMP TURNS ON. WATER GOES INTO THE TANK.IT COMPRESS THE AIR WITCH CREATES PSI. Let me ask u another question. By any chance,before this booster pump was installed.Have U noticed your system turning on & off rapidly.Like all the time.How about your power bill.Has it been kind of high.