Sequence Pump Installation Hints

• Locate the pump as close to the source as possible. It is best to have your main (longest) run of pipe on the discharge side of the pump.
• Install the pump outside the pond, and below the level of the surface of the pond (flooded suction). This will help insure a proper supply of water to the pump. Remember, a pump can't pump out water if there isn't any available. Even if your supply line comes up and over the top of the pond wall, it will still offer a flooded suction if it has no breaks to atmosphere before it goes back down below the surface level and if all air is removed.
• If it is not possible to provide a flooded suction installation then:
• Position the pump as low as possible, and as near the source as possible.
• Install a priming pot on the inlet of the pump.
• Install a foot valve, or a swing check valve in the inlet line below the water level.
• Always prime the entire inlet line, priming pot, and pump before turning it on.
• Always have your inlet pipe diameter equal to or larger than the discharge line.
• Minimize friction losses by using larger diameter pipe. Determine the approximate flow rate you want and the approximate total length of your pipe. Consult a friction loss chart to choose the proper diameter pipe. (The size of the pumps suction and discharge ports does not dictate your proper size.) Choose a pipe diameter that keeps your friction loss below about 6 feet per 100 feet of pipe. The longer your run of pipe, the more critical it is to minimize your friction loss. Normally, a minimum of 2" line is suggested for systems with flow rates from 30 to 60 GPM.
• Use a filtration system that does not require a lot of pressure. It costs money to create pressure (You need a bigger pump to overcome the pressure loss - bigger pump = more electricity needed). Biological filters work well and require very little pressure. It is extremely important to make sure the water supplied to the pump is FREE of debris.
• Never allow a horizontal centrifugal pump and motor unit to become submerged. If this ever accidentally occurs, shut the unit down, disconnect it, and have a reputable service shop examine the motor before using it.
• Never run a pump dry. This will damage the seal and impeller. They are designed to pump fluid, not air. Insure the pump is full of water before you turn it on, and that it doesn't out-pump the supply. It is extremely important that the water supplied to the pump is FREE of debris.
• Cover the pump and motor unit with a suitable shelter. When protected from rain and dust, the motor will last much longer. The covering should still allow the unit to have suitable air recirculation for proper cooling.
• If your pump is producing too much flow, you can reduce the flow by partially closing a valve on the discharge line (never restrict the inlet). Always allow a couple of gallons per minute to flow to prevent over heating.
• If more flow is required than a single pump can produce, use two or more pumps in parallel. This also offers the benefits of being able to vary the flow rates, insure partial flow if one unit needs servicing, and can often save a substantial amount of electricity compared to using one very large pump.
• Choose a pump that can give you the required flows at the lowest possible amp draw. Since many pumps will be operating continuously, the amp draw and its effect on your monthly utility bill can be very significant.
• Check to be sure the motors electrical connections are set up to match the supply voltage.
• Install shut off valves before and after the pump, so you can easily remove it from the line without having to drain your system.