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INSTALLATION INSTRUCTIONS
ADJUSTABLE LEVEL INDICATOR CAP
1. The adjustable level indicator cap is designed for a 3-inch FPT opening. Order P/N 230272 if tank is
made of rigid material and not a SeaLand holding tank.
2. Loosen the compression nuts on the adjustable stem bosses and install the cap into the tank. Slide the #1
stem (see dimensional specifications on previous page) down until the float touches the bottom of the tank.
Tighten #1 compression nut and mark the stem at the top of the nut with a pen or pencil. Do not cut the
stem at this mark. Loosen the compression nut and slide the stem up and carefully cut the #1 stem 1-5/8 inch
(41.3mm) below the mark without damaging the switch wires. Pull the wires through the black wire cover
and push the stem down into the compression nut until the black wire cover touches the compression nut.
3. Remove the cap from the tank and adjust the #2 stem for 1/2 full level for gray and black water tanks or 1/4
full level for fresh water tanks. Tighten the compression nut and cut the stem off 3/8-inch (9.5mm) above the
compression nut without damaging the switch wires. Slip the black wire cover on to the top of the stem.
4. To make the #1 float switch activate the empty light, the float must be positioned with the recessed shoulder
at the bottom. Remove the C-clip from the switch body and flip the float 180 degrees and replace the C-clip.
(See Diagram #1.)
5. The #2 float switch can activate the mid light on black and gray water tanks and activate the low light on
freshwater tanks. The recessed shoulder should be up for black and gray water tanks and down for
freshwater tanks. (See Diagram #2.)
6. Route 18-gauge stranded copper wire from the indicator panel to the float switch cap. Use quick disconnect
terminals on float switch wires to prevent twisting wires when removing the cap. With cap removed from the
tank, connect the wires according to the wiring diagram and test the floats by moving them up and down.
Disconnect the wires and install the cap with the O-ring into the tank, then reconnect the wires.
7. For caps with vents, route 5/8-inch vent hose from the thru-hull fitting to the vent connection on the float
switch cap. Use stainless steel hose clamps to secure the vent hose connections.
CONTROL PANEL
1. Select a mounting location away from direct contact with water and oil. Dry locations in the bathroom,
salon or galley are most desirable.
2. Confirm clearances for the panel behind walls, hull liner or bulkhead.
3. Cut out mounting hole for control panel. (See template for cut-out and hole locations.)
4. Do not mount the control panel until wiring is routed and secured to the terminal block or rear of the
control panel housing.
5. Route wiring following one of the wiring diagrams for black, gray or fresh water applications.
6. Include wiring for any of the optional electrical accessories that may be part of the installation and shown
in separate wiring diagrams.
7. Mount the control panel with the (4) #6 x 1-inch long black, oval-head screws provided.
8. Determine which tank application the control panel will be monitoring and insert the appropriate color
light and matching lens into the correct location following the chart below.
Waste (Black) Water
Gray Water
Fresh Water
Green
Green
Red
Yellow
Yellow
Amber
Amber
Amber
Yellow
Red
Red
Green
Diagram #1
Diagram #2
WASTE TANK
(BLACK & GRAY WATER)
FRESHWATER TANK
(POTABLE WATER)
RECESSED
SHOULDER
UP
RECESSED
SHOULDER
DOWN
Tank Application
Light & Lens Color Location
Empty
Low
Mid
Full