Questions about water pump

what should be considered in buying a pump?
     a. Pump condition is not defective / damaged / still sealed.
     B. See also the completeness of a given pump accessories.
     C. Make sure there is a hologram on the box that indicates the pump has never been opened.

     Did I really have to buy 2 pumps to push and pull?
     need to determine the magnitude and the water needs of your home. When large enough then it takes 2 pumps, one for supply and one for the shelter booster (booster pump).

     what is a good type of pump used to suck water from the pipe taps?
     sucking water taps are not allowed to pump, you can be dealt with by law. We recommend that you use the underground shelter before circulated to all taps or raised to the toran. Underground shelter is useful to pursue a lower elevation. You are advised to use a plastic tank that many are sold rather than making concrete tank to prevent leakage.

     what causes rapid engine hot, and hot when it went dead, what about the obstacles, and how to fix it?
     when the engine went dead heat and thermal protector is normal because the engine works. If the engine will not die immediately burned. Can cause a wide range, there is a blockage in the suction pipe, or there is a pebble jammed in the impeller so that the engine turns into abnormal. Another possibility ball bearings are not working. Could try replacing the ball bearing, clean the impeller, or lifting the suction pipe and try to clean the valve at the end of the pipe.

     why my pump sounds very rough and noisy?
     in general the pump is noisy. But the noise does not exceed the standard 46 decibel (db). If exceed these standards, then check the condition of the ball bearing pumps.

     whether the pump will be damaged if no water is sucked up when turned on?
     to turn on briefly (about 5 minutes) will not be problematic. But when turned on without the presence of liquid will damage the mechanical seal, ball bearings, etc., including the burning bike.

     how long the pump can be turned on continuously without stopping the pump without causing damage / burn?
     in principle, the water pump can work for 24 hours non-stop for the water source does not dry (empty). But it would be nice if the water pump is used 2 pieces that were given protection relays where the pump will work alternately every 1 or 2 hours according to your wishes.

     how the resistance of a water pump?
     under normal conditions 6-10 years. Depending on the class.

     Why not pump the maximum supply current?
     there are several possibilities: valve / foot valve hampered try cleaned, the slope of the pipe allows air pockets trying to fix that slope, (fig. 1), vane worn or obstructed try to be cleaned or replaced spare parts.

     Why I want to pump any water use must be lured with water?
     to pump water to the new conditions had to be lured installed first. But when it is running and each time still to be fished, the suction pipe should be checked, there may be a leak from the pipe joints are less glue (less in-glue). It could also be because tusen clamp (check valve) on the pump is leaking or clogged dirt / sand.

     to the size of the suction pipe and push, whether you should follow the default size of the pump? When may differ, which one is better, the larger the size of the outlet pipe from the inlet, or vice versa?
     the size of the suction pipe and thrust it should follow the default size of the pump, but sometimes many consumers minimize pipe cost saving reasons. In this case you should choose a smaller outlet pipe while the corresponding diameter of the pump inlet pipe.

     by using a pump type jet pump. Can install boreholes with casing pipe 4 "then the rest of the pieces down using a smaller casing?
     pump jet pump suitable for use in water depths of over 9 meters. With the casing 4 "only 1 stick, meaning ventury is not submerged jet (this is usually called a jet suspension system). In fact, these components must be submerged in the water, if its not the pump performance will not be maximized. The length of casing pipe 4 "minima reach the surface of the water jet can be achieved so that ventury soaked in water.

     if I want to suck water from a water bath on the ground floor to a holding tank on the 2nd floor, should I use any type of pump with a capacity of how many? Where should I put the pump, at the bottom or on the top floor?
     you can use a shallow well water pumps. Capacity of your stay to check the capacity of the ground floor and the tub on how large tank capacity. Pump should be placed near a water bath under as close to the water source.

     whether it can pump type jet pump (deep well) is converted into a shallow well pump jet pump or semi, with the vent closed (diplug), so the installation of the pipe as a shallow well pump, there is only one suction pipe?
     can. It's just the ability to suck water into the equivalent semi-jet capability.

     to turn off the pump automatically, which one is better to install a buoy systems or radar systems at toran filler faucet?
     better radar. This system is similar to manually turn off the outlet.
     The workings of the radar system (liquid level switch): When the tube is full toran weights would be lifted, the switch also come up and power will be disconnected automatically so that the pump died. When the ballast water is reduced, the tube will hang and automatic switch will turn the pump back. You need to modify the pump power cord to connect it to the switch that is in toran. It's just the price a little expensive, plus you have to install electrical installations up to toran. (fig. 8).

     Figure 8: Radar (liquid level switch)

     buoy system (pressure switch) when full toran buoys that float will close the valves so no back pressure on the pump automatic pressing at pressure to turn off the electrical current. When the reduced water will float down the open faucet, the water pressure at the pump by connecting the electric current decreases and back. The weakness of this system: When the tap is closed, the return flow to the pump as a result of age rather strong pressing pressure switch / automatic will be shorter. Additionally float on the surface of the water easily swayed wavy, you can pump the living dead dead alive and well after a long time will damage as a float.