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4
WARNING — Failure to position the Automatic Air Vent inside of the Closure will allow excessive trapped air to
accumulate in the filter. If the Closure is properly closed, trapped air can cause the Closure to
separate and could cause severe bodily injury and/or property damage.
7.
Pivot the diffuser out of the center of the tank by rotating the diffuser assembly counter clockwise. Fill the tank
about half full of water. Pour pea gravel first and then the sand into the top of the filter at a slow rate so that the
impact of the filter media does not damage the laterals. See Table 2 for the proper amounts of sand and gravel.
Fill filter to the proper level to maintain freeboard, as shown in Table 2. Pivot the diffuser assembly back to its
vertical position. Be certain the automatic air vent is protruding into the top of the closure as indicated below in
Figure 1. Be sure that the automatic air vent is in the center of the filter closure and that the screen strainer is
attached.. Wash away all sand around the threaded opening at the top of the tank.
Installing the Filter
WARNING — Use care when installing closure. The closure should turn freely in the filter, if resistance to
closure insertion is felt, then slowly remove the closure by turning counter-clockwise. The
starting thread of the tank and closure must engage properly in order to secure the closure.
Do not cross-thread closure.
Failure to install the closure properly can cause the closure to separate and may could severe bodily
injury and/or property damage.
1.
Assemble the pressure gauge and bleeder valve to the closure lid. Clean the lid o-ring and lubricate with silicone
grease such as Dow #33, 40 or GE 300, 623 lubricant. Place the closure lid on the filter and tighten, making certain
the air vent is up inside the dome of the closure.
2.
With the plastic wrench, provided with the filter, tighten the closure as tight as possible using two hands on the
wrench handles. As a minimum, the closure must be hand tight + 1/4 turn.
3.
Assemble piping and pipe fittings to pump and valve. All piping must conform to local and state codes.
4.
Use sealant compounds on all male connections of pipe and fittings. Use only pipe compounds suited for plastic
pipe. Support pipe to prevent strains on filter, pump or valve.
5.
Long piping runs and elbows restrict flow. For best efficiency, use the fewest possible number of fittings, and
large diameter pipe (at least 2").
CAUTION —Operating at excessive vacuum levels can cause the tank to crack and could cause property damage.
6.
When installing backwash lines, it is recommended that a vacuum breaker be installed on installations where the
backwash line length exceeds 40 ft. or the backwash line discharges more than 10 ft. lower than the lowest portion
of the irrigation system where air can enter the system.
7.
The maximum operating pressure of the unit is 75 pounds per square inch (psi). Never operate this filter above these
pressures or attach a pump to this filter that has more than 75 psi shut off pressure.
8.
Always install a chemical and fertilizer injection systems upstream of the filter. Always install a check valve upstream
of the chemical injection system to protect the water source from being contaminated.
9.
CAUTION — A positive shut off valve is not recommended at the outlet of the filtering system. If the system
is ever run with such a valve closed, the internal air relief system becomes inoperative and could create a
dangerous situation. Additionally, running the system with no flow will seriously damage the equipment.
10. Never store chemicals within 10 ft. of the filter. Chemicals should always be stored in a cool, dry well ventilated area.
™
Aqua-Clear
Fiberglass Sand Filter Installation and User's Guide
MANUAL AIR
BLEEDER
VALVE
Figure 1.
XX
XX
PRESSURE
XX
XX
GAUGE
XX
CLOSURE
AUTOMATIC
AIR VENT
TANK
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