5
2.3 Adding the Media
Block the top of the riser tube to stop media getting down the tube.(see fig A.3). Add about
1/3 by volume of water to the vessel so when the media is poured in it doesn’t damage the
bottom distribution system. If you have been supplied gravel with your kit this should be
added first so it covers the bottom distribution system. Add the media supplied but make sure
there is approximately 30%. free space left above the media so when the system is
backwashed the media can expand into the space and allow any sediment or contaminants to
be backwashed away (there may be media left over). Unblock the riser tube.
2.4 Fitting the Valve
Add a small amount of silicone grease to the valve outer and inner o-rings (fig A.4 & 5).
Fig A.4 Fig A.5
If a top screen has been supplied this should be attached next.
Slide the valve onto the riser tube and gently push
it down onto the vessel treads. Screw the valve on
until you start to squeeze the main O ring and
then finally give the valve a final tighten by tapping
the rear side of the valve with the palm of your
hand (fig A.6)
Fig A.6
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