SEPTIC INSTALLER WASHINGTON STATE WOSSA PRACTICE SCRIPT 2026 FULL ANSWERS GRADED A+

SEPTIC INSTALLER WASHINGTON STATE
WOSSA PRACTICE SCRIPT 2026 FULL
ANSWERS GRADED A+

⩥ SETTING the PUMP TIMERS Need to Know :(3).
Answer: # 1 . Dose Volume ( step 1 ) -30 gal .
# 2 . Number of Doses per Day- 12.3 ( Assume 370 gpd for daily flow )
370 gpd +30 gal - 12.3 doses per day
# 3 . Dose Interval


⩥ LPD Design Issues Increase in orifices #.
Answer: = Decrease residual head


⩥ LPD Design Issues Increase in orifice spacing.
Answer: = Increase residual head


⩥ LPD Design Issues Increase in orifice size.
Answer: = Decrease residual head and increase dose volume


⩥ LPD Design Issues Decrease in orifice size.
Answer: = Increase residual head and decrease the dose volume

, ⩥ GATE VALVES.
Answer: Used to ensure equal distribution ( squirt height ) in a low
pressure distribution system


⩥ GATE VALVES Located at.
Answer: Manifold / Lateral Line Junction


⩥ GATE VALVES Allow Adjustment During.
Answer: Squirt Test


⩥ GATE VALVES Require.
Answer: Box or Cover


⩥ Dosed or Pumped Distribution Need to know :.
Answer: -Tank size ( 60 " x 36 " )
-Dose Volume ( 30 gallons )
-Total Dynamic Head ( TDH ) ( 31 ft . )
-TDH - Elevation Head + Friction Loss + Residual Head


⩥ Cool factor ! 1 gallon of water=.
Answer: =231 cubic inches