The pool equipment required for circulating the pool and spa water through a filtering system is shown on the right side of this picture. This equipment consists of the circulation pump, a large filter and the valves and piping required to control the flow of water from and to the pool and spa.
This picture provides a closer view of the circulation equipment. The circulation equipment is often broken into two sections: "From Pool" - the suction side of the pump that pulls water from the pool; and "To Pool" - the discharge side of the pump that pushes water back through the filter to the return ports of the pool. We'll discuss the "From Pool" equipment first.
This is a picture of the main circulation pool pump - a Jandy 2HP variable speed E-Pump JPR 2.0. It operates at speeds of between 1725 and 3450 RPM to conserve energy. Water from the pool comes into the pump on the left side of the picture and is discharged to the filter through a port on the top of the pump. Click here for more information on "How a Pool Pump Works".
Pool Drains - the white strips at the bottom of the pool. Two were installed for this pool system: one for supplying water to the main circulation pump and one for supplying water to the feature's pump discussed in Part 2 - Features. Both of these drains collect debris off the bottom of the pool.
Valves can be installed for either manual operation or automated operation. For manual operation you set the handle manually to open or close selected ports. In an automated operation, a valve actuator is mounted on top of the valve and the valve is controlled digitally though a control box. For more information on valves click here
This picture shows a common valve setting for this pool. The yellow "T" lines placed over each valve show the position of the valve handles. If the handle is placed so that the top of the "T" is across a pipe, that port is closed - as is the case for the pool cleaner and the spa drain. If the handle is placed with the top of the "T" running in line with the pipe, all ports are open. If the "T" is at an angle to the pipe, the valve is allowing partial flow through the port - as is the case with the pool drain. In this particular valve configuration water is flowing to the pump from the two skimmers and partially from the pool drain. Water from the spa drain and the pool cleaner is blocked. When the suction cleaner is used, the skimmer ports are shut off to provide more suction to the cleaner.
After the water is filtered, it flows to a valve that diverts the water through a heater loop if desired. If not, the valve is set to have the water bypass the heaters and flow directly to the system chemical treatment equipment. The yellow "T" superimposed on the valve shows that the valve is set to divert the water through the heater loop. See Part 3 for an expanded discussion of this pool's Heaters.
This pool system uses a fully automated chemical system to control the chlorine and pH levels. See Part 4 for an expanded discussion of the Chemical equipment. Note that a check valve has been inserted just before the Chlorinator. This valve only allows the water to flow in one direction. Sometime when the pumps is shut off, backpressure is created that may push the water backwards. This valve keeps the undiluted chlorine water from backing up into and damaging the heater and filter systems.
This Flow Gauge monitors the water pressure in the pipe to alert the user to a possible water flow problem like a partial blockage or the need to clean the filter. It is also used to help balance the line to provide optimum pressure in the line. These gauges come in different models according to the size of the pipe. In this case the gauge is calibrated for a 2 1/2" pipe and is currently reading at 135 GPM.
This picture shows a common configuration for return valves when the Spa is not in use. The yellow "T" lines placed over each valve show the position of the valve handles. Water to the Spa return ports is blocked and water is flowing to the 5 Pool Jets and the Spa Bubbler. Note that by the positioning of the handle more water is flowing to the Pool Jets than the Spa Bubbler.