5900-BT Greensand Filter Installation & Maintenance Guide
Page 23
www.cleanwaterstore.com
Rev 112918
Problems with Pressure Loss or Reduced Flow
1.
First make sure that the problem is the Greensand Filter and not another cause. Check the
flow rate out of a faucet, with the 5900-BT control valve on by-pass.
2.
Greater flow and pressure when the unit is on bypass does mean the problem is in the filter.
No change would indicate the problem is before the filter.
3.
The valve:
Over time, deposits can build up on the inside of the valve, and prevent the
piston from moving, or fully advancing to where it needs to be – like an elevator stuck
between floors – and this can affect the flow. The solution is to replace the seals and
spacers, clean the valve where you removed the parts, clean and inspect piston, re-install.
4.
The filter media:
As is already noted in the guide, the backwash must be done with the
sufficient flow rate and be backwashed frequently enough to keep the filter media clean
and free of rust.
5.
Mud-ball formation:
If your water has high levels of sediment, silts, or clay getting into the
filter, over time these elements can combine to form balls which will ruin filter
performance. If multiple backwashes do not recover the media, you must take the control
head off and inspect the media.
6.
Sometimes the flow is being restricted because of sediment accruing and forming small
balls of mud, which cannot be washed out of the system. If this is the case, replace the
filter media.
Replacing the Greensand Filter Media
Typically, after 4 to 6 years the Greensand Media will stop removing iron efficiently and needs
to be replaced. To accomplish this:
1.
Turn water to system and depressurize the filter by opening a hose bib or faucet after
the Greensand filter system.
2.
Put system on bypass and remove the union fittings between the bypass valve and the
5900-BT control valve.
3.
Unscrew the control valve and set aside.
4.
Siphon water out of the Greensand filter by inserting a small flexible tube down the
distributor tube and siphoning out the water.
5.
Lay down clean tarp outside or somewhere you can flush water and clean the tank out.
6.
Insert a garden hose in the tank and allow water to flow down center distributor tube.
Greensand Media will begin to flow out on to the tarp.