A. GENERATOR KNOB, FLAME VALVE - Fuel adjustment to burner.

B. AIRCONTROL SHUTTER VALVE - Air input adjustment to burner.

C. AIR PRESSURE GAUGE - Air input adjustment to burner

D. PREHEATER VALVE - Inputs gas to preheater.

E. GENERATOR PREHEATER SHIELD - Contains heat while gas is vaporizing.

F. ORIFICE CLEANER - Cleans orifice in preheater.

G. AIR VALVE - Hand pump attachment used to pressurize fuel tank.

Figure 2-11. - Burner operating controls.

Figure 2-12. - Leaching cesspool.

day, based on the recommended leaching test, is provided below. Soils that require more than 30 minutes for a fall of 1 inch are unsatisfactory for leaching, and some other disposal method must be used.

The test for leaching should be made by digging a pit about one half of the proposed depth of the cesspool, making a test hole 1 foot square and 18 inches deep at the bottom. The test hole is filled with 6 inches of water that is allowed to drain off. Six inches of water is again