How does my in-ground Pump operate?
- Hayward in-ground pumps are self-priming centrifugal pumps.These pumps have a vacuum chamber, commonly known as a pump housing.
The pump housing must be filled with water in order to create a vacuum, resulting in the pump drawing the water out of your pool or spa. The pump housing will remain full of water while the pump is on, and will remain full or partially full when the pump is shut off.
- When powered on, the motor will begin to rotate. 2-speed pumps will power on a pre-selected speed or with some controllers, it will cycle at high before changing to the lower speed.
- The motor spins the pump impeller, located inside the pump volute. While the motor is rotating, the tips of the impeller are hydraulically sealed inside the pump diffuser, which is responsible for self-priming.
- Self-priming can only occur if the pump has a diffuser—all inground Hayward pumps have an internal diffuser. It helps to eliminate any air approaching into the pump housing from the suction piping. As all the air is removed from the system, you will notice bubbles returning to the pool through the return fittings. A full prime occurs when the bubbles stop returning to the pool and the pump basket is full of water. The filter pressure will rise as the pump reaches full prime. The actual gallons per minute (GPM) vary with the type of pump, horsepower, pipe size, distance from pool and other restrictions within the plumbing system.
- Hayward self-priming pumps are very dependable and simple in design. They require a sufficient supply of water from the pool or spa, and no air in the suction lines. Air could come from a loose strainer cover, a leak in any valve, a pinhole in any suction line or a crack or loose connections in the underground piping.