Environmental Control Unit (ECU)
The ECU (6) heats and cools the interior of the latrine container.
The utility panels are inlet into the exterior walls of the container for power, water supply, and blackwater
drain. The panels contain connections as follows:
Electrical Panel (7):
One 60A, 208VAC, 3-phase main power input socket
One grounding terminal
One 20A 208VAC single phase output receptacle (CL only)
Two 20A 110VAC single phase power outlet receptacles (CLS only)
Water Supply Panel (8):
One fresh water connection
One freshwater connection to flush tank #2 (CL only)
One recirculation connection (CLS only)
Blackwater Drain Panel (9):
One blackwater connection
Fresh Water System Components
Inside the latrine the fresh water supply is distributed to the interior water pump (10) with expansion tank
(11) (CLS only), water heater (12), sinks (13), urinal (14), spigot (15), toilets (16), and recirculation outlet,
(CLS only when cold weather kit is in use as described in WP 0007 00).
Blackwater System Components
Blackwater connections drain wastewater from sinks (13) and urinal (14) to waste holding tank #1 (17).
Toilets (16) are drained to waste holding tank #2 (5).
Two interior fluorescent lights (18) and one exterior light (19) are controlled by switches on the side of the
circuit breaker panel (20).
Water Pump (CLS only)
An interior water pump (10) is mounted on a shelf located above waste holding tank #1. The water pump
(10) is used with the 3,000-gallon water tank (21), which is stored inside the container when not in use.
Recirculation Valve (CLS only)
A recirculation valve (22) is located above the water pump (10). The recirculation valve (22) is used when
cold weather components are in use as described in WP 0007 00.
Reduced Pressure Backflow Prevention Device
A reduced pressure backflow prevention device (23) is installed on the end-wall of the container in stall
number six. The backflow preventer is installed as part of the permanent CL/CLS plumbing. Its purpose
is to prevent contamination of the fresh water supply by the black and gray water associated with the
The sinks (13) are mounted to the container floor. Fresh-water line connects to the water supply panel (8).
The blackwater PVC pipe connects to waste holding tank #1 (17). A spigot (15) is mounted to the sink
The urinal (14) is mounted to the latrine and waste holding tank #1 (17). PVC fresh-water pipes connect to
the water supply panel (8) and water pump (10) (CLS only), and waste holding tank #1 (17).