Sand filters purify pool water by trapping dirt and debris as it passes through the sand. Pool water is pumped through the system. The sand catches dirt and debris, purifying the water before returning it to the pool. Although the operation of a sand filter is basic, it is incredibly effective. (reference: 22-Sept-2020)
The Sand Filtration Process Explained
Here's a breakdown of how sand filters work:
- Water Intake: Pool water, potentially containing dirt, algae, and other contaminants, is drawn into the filtration system.
- Pumping: A pump forces the water under pressure into the sand filter.
- Filtration: The water passes through a bed of sand, typically composed of various grades. The sand traps particles and debris.
- Clean Water Return: The now-filtered water exits the filter and returns to the pool.
Advantages of Sand Filters
Sand filters are popular because they offer a balance of effectiveness, cost, and ease of maintenance:
- Effectiveness: Effectively removes many common pool contaminants.
- Cost-Effective: Relatively inexpensive to purchase and maintain.
- Simple to Operate: Simple design makes them easy to use.
- Longevity: With proper care, sand can last for several years before needing replacement.
Sand Filter Maintenance
To maintain optimal performance, sand filters require regular backwashing:
- Backwashing: Reverses the water flow through the filter to flush out trapped dirt and debris.
- Rinsing: After backwashing, a short rinse cycle helps resettle the sand bed.
- Regular Intervals: Backwash when the filter's pressure gauge indicates it's necessary.
