Flushing
NOTE:
Several flushes are often required to thoroughly clean the system and prepare it for the next fluid to be
sprayed, or to store the sprayer. Use this chart to determine the required flushing order for the fluid you are
using, and then follow the procedure below for flushing.
*Use this category for flushing a brand new sprayer and flushing after storage.
System has
this fluid in it:
Next fluid to be
sprayed
Flushing order:
Before you spray or store
sprayer:
this fluid in it:
sprayed.
Flush 1
Flush 2
Flush 3
sprayer:
*Oil-based
solvent or paint
Oil-based paint –
new color
Mineral spirits none
none
Prime with oil-based paint
Oil-based
solvent or paint
Water-based paint Mineral spirits Warm soapy
water
Clean water
Prime with water-based
paint
Oil-based
solvent or paint
Prepare for
storage
Mineral spirits none
none
Relieve pressure,
Leave drain valve open
Water or water-
based paint
Water-based paint
– new color
Warm soapy
water
Clean water
none
Prime with water
Water or water-
based paint
Oil-based paint
Warm soapy
water
Clean water
Mineral spirits Prime with oil
Water or water-
based paint
Prepare for
storage
Warm soapy
water
Clean water
Mineral spirits Relieve pressure,
Leave drain valve open
To reduce the risk of static sparking and
splashing when flushing, always remove
the spray tip from the gun and hold a
metal part of the gun firmly to the side of a
grounded metal pail.
WARNING
FIRE AND EXPLOSION HAZARD
1. Follow the illustrated
Pressure Relief Procedure
on page 13. Engage the gun safety latch.
2. Turn the pressure adjusting knob fully counter-
clockwise to zero pressure.
3. Remove the spray tip from the gun. Remove the
filter bowl and screen; see manual 307–273. Clean
the screen separately and install the bowl without
the screen to flush it. See Fig. 8.
4. Put the suction tube into a grounded metal pail
with 1/2 gallon of compatible solvent.
5. Start the sprayer. See page 9. To save the fluid
still in the sprayer, trigger the gun into another
container until the next fluid appears, then trigger
the gun back into the fluid you are pumping. Circu-
late the flushing fluid a couple of minutes to thor-
oughly clean the system.
6. Do not run the pump dry for more than 30 seconds
to avoid damaging the pump packings!
7. Follow the illustrated
Pressure Relief Procedure
on page 13. Engage the gun safety latch.
8. Unscrew the filter bowl and reinstall the clean
screen. Install the bowl and hand tighten.
9. Remove the suction tube and screen and clean
them separately.
PRESSURE
DRAIN VALVE
FILTER
BOWL
SCREEN
FILTER
SUPPORT
Fig. 8
