Backwashing a swimming pool sand filter is an important element of pool maintenance. It ensures that swimming pool water is filtered correctly at all times. A sand filter needs to be back-washed once every 2 weeks or when the automatic pool cleaner moves slowly around the swimming pool.
How To Backwash A Pool Sand Filter
1] Switch off the swimming pool pump motor.
2] Disconnect the automatic pool cleaner or anything else that is connected to the pool weir.
3] Remove and clean both the weir and pool pump baskets. Refit baskets back into place.
4] Set the multiport valve onto the BACKWASH position. Remember to push down on the multiport handle first to unlock it before turning the handle. This prevents the multiport valve seal from being damaged.
5] Check to see that the waste hose is laying in the correct place, as this is where all the dirty water from the sand filter is going to. Also to make sure that the dirty water is not returning back into the swimming pool.
6] Switch on the swimming pool pump and allow it to run for at least 2 minutes or until the water in the sight glass is clear.
7] Switch off the swimming pool pump motor again.
8] Push the multiport handle down and turn it to the RINSE position. This is to recompact the loose sand after the backwash cycle.
9] Switch on the swimming pool pump for 20 seconds.
10] Switch off the swimming pool pump again.
11] Push the multiport handle down and turn it to the FILTER position.
12] Reconnect the automatic pool cleaner to the weir and resume normal filtration and cleaning.