The phrase identifies a specific method of cleaning a swimming pool that involves removing debris directly from the pool floor and expelling it from the pool system, rather than filtering it. This technique utilizes the pool’s vacuum system to suction sediment and contaminants, bypassing the filter, and directing the waste water out of the pool, often via a backwash hose. An example scenario would be after a heavy storm, when significant amounts of leaves and dirt have settled at the bottom of the pool.
This process is crucial for managing significant algae blooms, excessive debris accumulation, or the presence of very fine particles that would otherwise clog the filter quickly. Performing this action prevents overwhelming the filter system, reduces the frequency of filter cleanings, and can be more effective than standard filtration methods for removing certain types of contaminants. Historically, this technique has been employed as a standard maintenance practice in pool care to maintain water quality and prolong the lifespan of filter equipment.
