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?

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?

"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?

All as per Rich's explanation - but a couple of extra things

a) Your filter should have a pressure guage on it - you need to backwash
when the pressure starts to climb. The previous owner should be able to tell
you what the "normal" operating pressure is. If in doubt then backwash it
for a couple of minutes & then rinse for a minute.

b) Never move that multiposition valve with the pump switched on. Switch
off, move to backwash - run for 2-3 minutes. Switch off, move to rinse, run
for one minute, switch off, move to filter, switch back on & run - refill
pool as necessary depending on how much water you sent to waste.

c) Depending on what pump you have you can shift an awful lot of water very
quickly down the drain so don't leave it running to Backwash/Rinse!

you might have a "waste" position on the valve as well - this just bypasses
the filter & pumps water straight to waste normally.

The length of time you need to backwash for depends on how dirty the filter
is . You should only need to do it two or three times a year

HTH

I.

You need to find the company that makes it and look for them on the net,
read about it, so many people have problems with sand filters because they
don't know how to use them. Don't use it on a large load Koki pond, but
again I know there are some out there that work for this, so look it up.

"Iain Miller" wrote in message
...

"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?

All as per Rich's explanation - but a couple of extra things

a) Your filter should have a pressure guage on it - you need to backwash
when the pressure starts to climb. The previous owner should be able to
tell
you what the "normal" operating pressure is. If in doubt then backwash it
for a couple of minutes & then rinse for a minute.

b) Never move that multiposition valve with the pump switched on. Switch
off, move to backwash - run for 2-3 minutes. Switch off, move to rinse,
run
for one minute, switch off, move to filter, switch back on & run - refill
pool as necessary depending on how much water you sent to waste.

c) Depending on what pump you have you can shift an awful lot of water
very
quickly down the drain so don't leave it running to Backwash/Rinse!

you might have a "waste" position on the valve as well - this just
bypasses
the filter & pumps water straight to waste normally.

The length of time you need to backwash for depends on how dirty the
filter
is . You should only need to do it two or three times a year

HTH

I.