Backwash sends water up through the sand filter to dislodge debris, kind of
floating the sand in the process and sends the debris to waste. Rinse has
the water flow the same direction as filter, but sends the loose stuff to
waste before sending it back to the pool. filter position is like rinse,
with the water going down through the sand and back to the pool.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html


"clive" wrote in message
om...
Just moved house, now have a pool fitted with a sand filter. What does
a backwash amd a rinse operation do? which operation is done before
returning handle back to filter?