3
3.2
FILLING THE FILTER MEDIA
3.2.1
Before filling the filter media into the filter vessel, carry out a visual check of the laterals.
Look for broken or loose laterals. Replace if necessary.
3.2.2
To eliminate stress on the laterals, fill the filter vessel half full of water to provide a
cushioning effect when the filter media is poured in.
3.2.3
(a) Top Mount Fibreglass Filters
- Top Mount Fibreglass Filters are supplied with a
perforated plastic locator, which centres the stem and prevents media from entering
the stem pipe. Place the perforated plastic locator on the centre stem of the filter and
carefully pour in the filter media via the perforated holes of the plastic locator. Remove
the plastic locator once completed.
3.2.4
Note: If a template is not provided or is lost, you must centre the stem and cover the
stem opening to prevent non-alignment and media from entering the stem pipe.
3.2.5
(b) Side Mount Fibreglass Filters
- Remove the top diffuser from the internal diffuser
pipe and place the flexible air relief tube inside the filter vessel and to the side, out of the
way. Cap the internal diffuser pipe with the filter media shield provided to prevent filter
media from entering it. Do not move the diffuser pipe, as this can affect the integrity of
the bulkhead seal.
3.2.6
Note: The above instructions do not apply to Side Mount Fibreglass Filters larger than
SM600 filters. Any filter media entering the diffusers will be removed during normal
operation.
3.2.7
Wash all the filter media and debris away from the threads and sealing surfaces of the
filter vessel.
3.2.8
Lubricate the o-ring or gasket on the Multiport Valve. The lubricant used should be
silicon-based and not petrochemical-based.
3.2.9
Thread the Multiport Valve or Top Cap onto the filter tank and hand tighten.
3.3
PLUMBING
3.3.1
Check that the incoming water pressure is within the filter’s recommended working
pressure. Ensure that a pressure limiting valve is installed if using mains water or a
high-pressure pump.
3.3.2
Ensure that a foot valve/non-return valve is installed if the pump is installed at 500mm
(20”) above the water level.
3.3.3
If the filter is installed below the water level or connected to mains water, isolation
valves should be installed at the inlet and outlet of the filter. This will prevent water
flow during any routine maintenance.
3.3.4
Minimise the length of pipe and the number of fittings to minimise restrictions to water
flow.
3.3.5
Connect all plumbing to the Multiport Valve, ensuring all plumbing connections are
glued and tightened securely to prevent leaking.
3.3.6
Ensure solvents/glues are not excessively applied to fittings as this could flow into
o-rings and create sealing problems.
3.3.7
Do not overtighten fittings or adapters.