If you have a heavy infestation of algae then often the tiny particles won’t get trapped in the filter so will go straight back into the pool.When your pool is very dirty you would vacuum on the waste setting so the dirt goes straight out of the system without passing through the filter.When you wish to reduce the amount of water in the pool, perhaps after heavy rain or even to empty the pool fully.The waste setting on pool filter is used, in the following three situations: Many people seem to get confused about what is the waste setting on a pool filter used for. When it reaches the bottom of the filter it returns to the pool as clean water through the inlet jets, waterfall or whatever other similar feature you may have. The water passes through the sand which traps any small particles of dust and other dirt.
The water then travels through the pump and into the top of the sand filter. It will then pass through the debris filter basket on the inlet side of the pump so that any large pieces of dirt, such as leaves, will be removed prior to passing through the pump as they could cause damage. When it is on the filter setting, and the pump is running, the water will be drawn into the system through the skimmers and bottom inlet (if you have one).
#How to set up above ground pool pump and filter how to
My article “ How to clean dirt from the bottom of a pool” explains this process fully in a step by step guide.
Whenever the dirt levels are not too high you can let the filter remove it and then backwash to eject it from the system. The filter setting is also the one you will use the most when vacuuming your pool. Mostly it will be used when the pool pump runs on your timer to keep the water in the pool clean. It is the pool filter valve positions setting that your filter will spend most of its life on. The filter setting is used to filter the water through the sand. Pool filter valve positions Filter Setting