TM 11-6780-225-12
Figure 2-12. Valves used for water source under pressure.
12. Prime valve P1
NOTE
The water heater is preset at 150
F
13. Supply valve S1
(65.5 ).
C
14. Supply valve S2
15. Supply valve S3
16. Supply valve S4
(a) Close all valves in the darkroom
17. Supply valve S5
((1)(a) above).
18. Supply valve S6
(b) Connect the darkroom to the water
19. Supply valve S7
source (para 2-4f(2)).
20. Supply valve S8
(c) Hand carry a sufficient number of
21. Supply valve S9
pails of water to fill the small compartment of the
processing sink (fig. 1-17) until it is approximately 1/4
22. Petcock
full.
(b) Connect the darkroom to the water
(d) Open valve P1 (fig. 2-13) to prime
source (para 2-4f(1)).
the water pump. When the water stops flowing from the
(c) Open valves D1, S2 and S3 (fig. 2-
processing sink (c) above), close valve P1.
12).
(e) Open valves S1 and S3, then start
(d) Partially open valves S6 and S7.
the water pump by setting the water pump switch to ON
When the water runs freely, close valves S6 and S7.
position. Allow 5 to 10 minutes for water pump to
(e) The water system is now ready for
evacuate the air from the water hose, then open valve
operation. Hot water may be obtained by setting the
S6.
water heater switch (fig. 1-17) to the ON position.
2-17
