Electricity
If the distance between the pump and electrical panel is too long, electrical losses may require that a 240V minimum service be installed. What distance is too long for a 120V service?
What is over 90M (300')
What can be used to create a water tight seal through the well casing for the pump discharge when freezing could be a problem?
What is a Pit less Adapter?
When splicing electrical power lines to a submersible pump what is recommended to prevent "balling up" of the connections?
What is splicing the wires a short vertical distance apart from each other?
Cable ties (zap straps) can be used to secure the pump electrical wiring to the pump discharge line to prevent cables tangling or being damaged. What is the recommended spacing between ties?
What is 3M (10')
What is the best tool for detecting current imbalance?
What is a clamp on ammeter?
If your pressure has dropped in the house and no water is available. What is the 1st thing you should check?
What is has the breaker tripped / Is the power on?
What is the typical pressure differential between cut in and out setting on a pressure switch?
What is 20psid?
When installing the suction and pressure lines for a jet pump what is recommended before making the final connections to the Jet pump?
What is prime both lines by filling them with water 1st?
The "pumping" level within a well is the lowest point the well water level should maintain while the pump is running. What is the minimum distance below this level that a shallow well jet pump foot valve or a deep well jet pump ejector assembly must be installed?
What is at least 3' (.9m) below the pumping Level?
There are 2 adjustment springs in a pressure switch. The larger spring will adjust both the cut in and cut out pressures at the same time. What does the smaller spring adjust?
What is the smaller spring adjusts the cut out pressure only and thus can change the difference between the cut in and out pressure.
FYI: This difference in pressures comes pre set at 20PSI and reducing the differential can lead to shorter cycling of the pump.
At start up of a 3 phase pump motor you notice insufficient pressure build up from the pump. What should you do 1st?
What is interchange any of the 2 leads in the pump controller box to change the direction of the motor.
What can be used to assist in cooling a submersible pump motor when a top feeding (cascading supply) is present in the well?
What is a Flow Sleeve or Cooling Shroud?
Well pump installers use copper wire gauge charts, which take into consideration the distance the wiring must travel to make sure the pumps power supply is of sufficient size. If aluminum wire of the same size were to be used how much less distance would it be rated for.
What is Aluminum wire is rated for only 1/2 (.5) the distance as copper wire?
What is the maximum theoretical lift of a jet pump if the pump were to create a perfect vacuum
What is 34' (14.7psia X 2.31 ft/psi)
When commissioning a submersible pump the discharge valve on the end of the discharge piping must be kept approximately 2/3 closed to create a backpressure on the pump. Why is this?
What is to prevent the pump from up-thrusting the impeller shaft assembly (can cause damage) due to very low head pressure.
One of the main tests we can do on a 3 phase motor is to check for current imbalance between the 3 power legs to make sure they are relatively equal. What % of imbalance between the power leads would indicate a problem with the motor/wiring?
What is any imbalance over 5% between the leads.
If the cut in Pressure on a pressure switch is 30psi. What pressure should the pressure tank air chamber be pre set to and why?
What is approximately 26-28 psi (2-4psi below)? This setting is just below the cut in pressure so that the bladder in the tank will never completely bottom out, blocking the inlet and causing a pause in the water supply just before the pump is activated.
What is an optional system that can be installed if the well yield is not sufficient to meet peak demand?
What is a low yield 2 pump system?
The well pump is sized according to the well yield so as to not run the well dry. A 2nd pump is located in a large holding tank with sufficient volume and GPM to handle peak demand times.
For deep well submersible pumps over 200' it is recommended that additional in line check valves be installed at _____ feet intervals
What is 200' (60M)
What is the formula used to compute the average pumping rate of a well pump?
What is: APR= (volume / recharge time) X 60
As the pump wears the motor current will ______?
What is increase?
What is installed on the pump discharge piping inside the well casing to protect it from wearing against the casing?
What is a Torque Arrestor?
What are the recommended minimum distances from the bottom of a well that both a Jet Pump foot valve and a deep well pump be located
What is min 2' for a foot valve and min 5-10' for a submersible pump.
How many gallons per day is a person considered to require when sizing a rural water supply system?
What is 60G per person per day.
What is the location on a pump curve chart called where a pump is at its ideal spot, with the least amount of performance problems ?
What is the pumps: Best Efficiency Point (BEP)