Lafayette Hill's Terrain and the Wissahickon Gorge Corridor Shape Every Pool Equipment Decision
A pump specification sheet lists a flow rate and a power consumption figure based on testing in controlled conditions on flat installations. The specification assumes the pump is moving water with no significant elevation difference between the equipment pad and the pool water level. On flat suburban lots, that assumption holds.Â
On Lafayette Hill’s hilly terrain, where the equipment pad on a hillside property may sit several feet above or below the pool water level, the pump must overcome head pressure created by that elevation difference to move water at the rated flow. The amount of additional work the pump must do depends on how much elevation difference exists between the pad and the pool. Without measuring that difference at the assessment visit, the right pump size for that specific property is a guess rather than a calculation.
The Wissahickon Valley gorge woodland shapes filter sizing in the same way. The gorge runs directly east of Lafayette Hill with 1800 acres of mature trees on both sides of the creek. Their organic output through the growing season deposits into pool water in the surrounding residential neighborhoods throughout the season.Â
A filter designed to handle a 20,000-gallon pool on an open lot in a newer community will be asked to handle a meaningfully different workload if that same 20,000-gallon pool sits in a neighborhood where the gorge woodland adds consistent organic input to the water from spring through fall. The filter needs to be sized for the environment the pool actually sits in, not just for the pool volume.