Drew Cutter wrote:

I wish the upright diagram of DIY bead filter would of label the bottom
left outlet (the one the sealed) . Its functions ?

WOOPS!! forgot this

http://www.koi.com.my/ubbimages/ppdia.jpg

The above diagram shows the working principle of bead filter.

1. For normal filter operation, turn valve F to on position. Close all
other valves. For bead filter, water enters through the bottom and come
out from top of drum.

Please note this
( Top Photo shows the version water enter from the top and discharge at
the bottom. )

2. To backwash turn valve B to on position, off all other valves.
Duration 2 to 3 mins

3. To rinse turn valve F near inlet and valve R to on, turn all other
valves off. (Duration 30 seconds)




It seems that either version will work, just that the photo version
requires more complicated valve combinations.


Chagoi