BIRM Series Filter
Installation Operation Maintenance Manual
BIRM WS1 NOV 2007 \page 12
6.2 ASSEMBLY
Refer to the installation diagrams in Section 13 and note the
direction of flow through the system.
Ensure the installation site is clear and level.
Ensure that the piping system in the building transfers the treated water
into a vented header tank to feed any hot water systems.
If possible, place the filter vessel into its final location before filling. Check
that the riser tube has the cap in place before commencing filling.
Using a hose 1/3 fill the vessel with water. This is to prevent damage to the
bottom distributor when pouring in the media.
Using a funnel slowly pour in the support gravel. Next, slowly pour in the
Birm, taking care not to spill any on the floor and that the riser remains central
in the vessel during filling.
After pouring in all of the filter media, the vessel should be, at most, 70-75%
full. This is to allow rising space for the media during the backwashing cycle.
Once the vessel is filled, immediately sweep up any spilled filter media.
Remove the cap from the riser tube and brush any debris out of the threads
in the neck of the filter vessel.
Unpack the valve and reducer (if used). Screw the reducer into the filter
vessel, then slip the valve down onto the distributor tube. No top distributor is
used on filter valves to allow the maximum amount of debris to be
backwashed off the media.
Screw the valve into the filter vessel, taking extreme care not to cross the
threads. As the valve is being run into the vessel excessive force should not be
required. Finally tighten to approximately 20ft.lbs torque.
Adjust the position of the filter vessel to line up with the pipework
connections, not the position of the valve on the vessel.
Connect the inlet and outlet pipework to the valve using flexible connections
or plastic high pressure piping. Flexible pipework is essential to prevent
stress on the vessel as it cycles during service since it will expand and
contract longitudinally.
