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It’s time to stop staring at your sand filter in confusion (it’s the really big round plastic thing in your pump shed). Here’s what each handle position on the filter actually does:

FILTER

This is the normal operating position for running your pool. It allows the water to be sucked from your pool and forced through the sand inside your filter. The sand catches the dirt etc from the water and then sends ‘clean’ or ‘filtered’ water back to your pool.

BACKWASH

This allows water to be sucked from your pool and forced back through your sand filter in the reverse direction. All of the dirt etc is washed from the sand and flushed down the drain. This process will drain water from your pool, and needs to be done at least once a week during the summer and monthly during winter.

RINSE

This function is used directly after a backwash, and before the pool is returned to filtering mode. It will rinse out the remaining dirty water in your pool pipe work.

CLOSE

This will close the filter head, and not allow water to flow through it.

WASTE

This allows water to be sucked from the pool and then straight down the drain without passing through the sand in your filter. It is normally used to empty a pool, or when you need to vacuum something out that you do not want to pass through the sand (fine particles).

RECIRCULATE

This allows water to be sucked from the pool and then returned directly to the pool without passing through the sand. It would be used to add a special chemical that should not pass through the sand, or to investigate flow issues in your pool.