Piper ARCHER II Pilot Operating Handbook page 181

PIPER AIRCRAFT CORPORATION SECTION 8
PA-28-181, ARCHER II HANDLING, SERV. & MAINT
FUEL DRAIN
Figure 8-3
CAUTION
When draining any amount of fuel, care should
be taken to ensure that no fire hazard exists
before starting the the engine.
Each quick drain should be checked after
closing it to make sure it has closed completely
and is not leaking.
(e) Draining Fuel System
The bulk of the fuel may be drained from the system by opening
the valve at the inboard end of each fuel tank. Push up on the arms
of the drain valve and turn counterclockwise to hold the drain open.
The remaining fuel in the system may be drained through the filter
bowl. Any individual tank may be drained by closing the selector
valve and then draining the desired tank.
ISSUED: JULY 2, 1979 REPORT: VB-1120
REVISED: MAY 29, 1980 8-13