
4-GALLON LITHIUM-ION BACKPACK SPRAYER

Getting Started
You have chosen one of the leading multi-purpose sprayers available today. This
sprayer can be used to spray any number of solutions and solvents for both
home and professional use. Please read and follow this manual carefully to
ensure that you get the most out of your new sprayer.
If you need assistance with the assembly or operation of
your sprayer, please don’t hesitate to contact WESSOL
via the support methods below.

FlowZone® Capabilities
This FlowZone® sprayer is a highly efficient sprayer that is suitable for spraying many kinds of water-soluble chemicals
such as cleaning products, pesticides, sealants, etc. Never operate the sprayer with strong acids, strong bases or flammable
liquids. Powered by an 18V / 2.6Ah Li-ion battery, this sprayer results in 7x more efficiency than a manual sprayer. This sprayer
can be operated continuously for over 2 hours and spray more than 40 gallons per battery charge at a distance of over 25 feet.
WARNING
THIS PRODUCT IS DESIGNED TO APPLY
CHEMICALS THAT MAY BE HARMFUL
AND COULD CAUSE SERIOUS PERSONAL
INJURY IF INHALED OR BROUGHT INTO
CONTACT WITH THE USER. FAILURE TO READ
AND FOLLOW OPERATION GUIDE BEFORE
USE AND/OR MISUSE OF THIS PRODUCT
COULD RESULT IN INJURY.
FlowZone® CYCLONE™ (FZSAAJ) SPECIFICATIONS

1. TAN K CA P
2. 4-GALLON TANK
3. INTAKE FILTER
4. TOP HOLSTER & BOLTS
5. BOTTOM HOLSTER & BOLTS
6. HIGH PRESSURE SPRAY WAND
7. BACKPACK STRAPS
8. 5’ HIGH PRESSURE HOSE
9. SPRAY GUN
10. 18V/5.2Ah LI-ION BATTERY
11. BATTERY QUICK CHARGER
12. ADJUSTABLE NOZZLE
13. PIN STREAM NOZZLE
14. 25° FAN NOZZLE

Remove the
top & bottom
holsters, nuts
& bolts and
nozzles from
the intake
filter under
the tank cap.
STEP 1: Set up your sprayer
Attach holsters to
tank and tighten
with the
nuts &
bolts.
Fully charge battery
prior to first operation.
Attach the wand to the gun by
pulling down on quick-connect
collar on gun and inserting wand.
NOTE: Make sure that the
brass quick-connect collar
slides back fully to the
Mount wand and spray gun
by snapping wand into
top and bottom holsters.
NOTE: Two unused
nozzles can be stored
in the top wand
holster while the third
can be kept in the wand!
NOTE: The flashing light on
charger indicates that battery is
charging and once it turns solid,
the battery is fully charged.
Double check charge level by
pressing indicator button on
bottom of battery.

Screw the brass hose fitting
to bottom of spray gun.
NOTE: Always connect hose / wand /
nozzles when sprayer is turned off.
Determine which nozzle is
right for the job & connect
to spray wand by pulling
down on quick-connect and
inserting nozzle.
1. Adjustable nozzle =
ranges from
jet stream to
conical stream
2. Fan nozzle =
flat 25° stream
3. Jet nozzle =
narrow pin stream
STEP 2: Get started spraying
Fill the sprayer with liquid
through the intake filter
and securely tighten
the tank cap.
NOTE: Always mix
liquid solution in a
separate container.
Turn pump on by flipping
switch on side of unit.
Flipping switch to “I” will
activate pump at 60 psi.
Flipping switch to “II” will
activate pump at 45 psi.
Begin spraying by
squeezing spray trigger.
NOTE: The pump will make a priming
noise when first activated.

Rinse out any solution you sprayed with water and
spray water through the sprayer and each nozzle for
3-5 minutes to completely rid tank of chemicals.
NOTE: Many chemicals will become sticky and gum up the
pump / hose / wand / nozzles if left in the sprayer.
Dry sprayer tank completely.
For long-term storage, regular discharging and
recharging of the battery is required (with an
interval of either every 2 weeks, one month,
or two months) to maximize battery life.
Recharge battery to 100% for next use.
Always store tank in a clean, empty and shady
location protected from extreme heat or frost.
Reconnect wand and gun to the top and bottom
holsters and place unused nozzles in top holster.

Other important considerations.
Do not operate the spray gun without
liquid in it. This may damage the pump.
After long periods of time without use,
the battery may have a low voltage and
will require extended charging.
Always wear protective clothing,
respirator, gloves, eye protection, etc.
when using chemicals.
Never spray chemicals against the wind
or towards humans, animals or food.
Do not operate sprayer in temperatures
lower than 32°F or exceeding 100°F.
Never operate with strong
acids, strong bases or
flammable liquids.
Never fill the sprayer with hot
liquids (max. temp. = 176°F).
Do not leave the sprayer in
reach of children or persons
not qualified to handle it in a
proper fashion.
Always use FlowZone® original
replacement parts.
Do not dispose of lithium-ion
battery with household waste,
recycle where facilities exist.

To register your sprayer, visit:
fzspray.com/register
FlowZone® Limited Warranty
WESSOL, LLC warrants (to the original purchaser) that this product will continue to function as intended if used in
accordance with operating instructions (under normal consumer use) for a period of one year.
If the product fails to function as intended DO NOT RETURN IT TO THE STORE, call our customer support hotline at
+1 803-339-2500 or email
[email protected]. We will, at our option, repair or replace any non-functioning parts
without charge (shipping & handling charges will apply). WESSOL, LLC shall have the option of requiring the return of the nonfunctioning product; together, with the proof of purchase, to establish a claim under this warranty. This warranty does not
apply to damage resulting from accident, misuse, neglect, alterations, or operation not in accordance with instructions,
commercial use, or normal wear.
ANY IMPLIED WARRANTIES, INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR CONSUMER USE,
ARE LIMITED TO THE DURATION SPECIFIED ABOVE. WESSOL, LLC’S LIABILITY IS LIMITED SOLELY TO THE REPAIR OR
REPLACEMENT OF THE NON-FUNCTIONING PRODUCT OR PART. WESSOL, LLC EXCLUDES LIABILITY UNDER THIS WARRANTY
FOR ANY AND ALL INCIDENTAL AND CONSEQUENTIAL LOSS OR DAMAGE.
Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of incidental or
consequential damages, so these limitations or exclusions may not apply to you. This warranty gives you specific legal rights
and you may have other rights which vary from state to state.
FOR ANY QUESTIONS OR CONCERNS:
fzspray.com/contact

fzspray.com
+1 803-339-2500
WESSOL, LLC
6420 Rea Road, Suite A1-104
Charlotte, NC 28277

sprayer capabilities and specifications
important considerations to follow
how to get started using product
what is included in the box
parts available to upgrade your sprayer
solve common issues with your sprayer
how to properly clean and store sprayer
assemble the sprayer out of the box

Troubleshooting your sprayer
1. Remove battery & reattach to sprayer
2. Charge battery
3. Disconnect & reconnect all 5 electrical
connections coming out of the pump
1. Battery is not fully connected
2. Battery is not charged
3. Electrical issue with pump
Remove screws and remove the plastic
covering to expose pump. Loosen clamps
on both hoses, position hose closer to
pump and retighten hose clamp
Input and / or output hose(s) have a
loose connection with pump
Leaks from gun and / or nozzle area
1. Inspect all seals & replace if necessary
2. Contact FlowZone® at +1 803-339-2500
for replacement part
1. Loose / damaged / broken seal(s)
2. Ball valve inside gun assembly is
defective
Clogged pump / hose / gun / wand / nozzle
1. Rinse sprayer thoroughly with warm,
soapy water after each use
2. Run gasoline through the sprayer to
break up clogs
Not rinsing tank / pump / hose / gun /
nozzle(s) with cleaning solution or water
after each use
Contact FlowZone® at +1 803-339-2500 for
replacement parts (see next page)

FZSAAJ
Replacement Parts
1. FZRABZ - Tank Cap
2. FZRABH - Top Wand Holster
3. FZRACH- Bottom Wand Holster
4. FZRABW - Inlet Filter
5. FZRABV - Spray Gun
6. FZRABP - Battery Cover
7. FZRAAS - Quick-Connect Wand
8. FZRAAU - GHT/GHT Hose
9. FZRACB - Backpack Straps
10. FZRABY - Diaphragm Pump (Small)
11. FZRACK - Tank Lid Viton™ Gasket
12. FZRACL - Tank Output Viton™ Gasket

FZSAAJ
Accessory Parts
1. FZAAAW - 18V / 2.6Ah battery
2. FZAABG - 21V / 1Ah battery charger
3. FZAAAP - Pin Stream Nozzle
4. FZAAAQ - 25 Degree Fan Nozzle
5. FZAAAR - Adjustable Nozzle
6. FZAABC - Trolley
7. FZAAAV - 20’ Extension Hose
8. FZAAAZ - Trolley with 20’ Ext. Hose