The Zircon
®
WL 25 Pro Electronic Water Level is an ideal tool
for determining level reference points up to 25 ft. (7.5 m) away.
The WL 25 Pro simplifies working alone or around corners with
accurate and reliable measurements and is ideal for a number
of applications, including erecting fences, building decks,
positioning drainage, plumbing, setting forms, completing masonry
work, or remodeling interiors. The WL 25 Pro features a 25 ft.
(7.5 m) hose, mounting bracket and screw, hose connector,
and filler nozzle.
INSTALLING BATTERY
Press battery door release and
remove door. Snap 9V battery onto
connector and place inside battery
compartment. Replace door and
snap shut.
ASSEMBLING THE WL 25 PRO
Using the hose connector provided, attach one end of
the long hose to the lower end of the short hose that
passes through the body of the unit. There will also
be a short length extending from the top. Move the
hose clamps, if necessary, so that one is on the short
hose extending from the top and the other clamp is at
the free end of the long hose.
FILLING WITH WATER
Open the top hose clamp and position the WL 25 Pro
to allow water to exit the top hose. Attach the
filler nozzle to an outdoor faucet and turn
on the water supply. Water will not flow
until the filler nozzle switch is turned to the
open position. Open the working end hose
clamp and press the 25 ft. (7.5 m) long hose to the filler nozzle exit.
Turn the filler nozzle switch to allow water to fill the long hose
until water is flowing out of the top hose. Allow the water to flow
until there is no air exiting the top hose for at least 10 seconds.
Close the filler nozzle switch and close the working end hose clamp.
You can also siphon water from a bucket to fill the hose. Ensure the
hose clamps are locked at each end to keep the water from running
out as you set up your working area.
NOTE: To avoid inaccurate readings, always remove large
air bubbles in the water filled hose before using. To help
remove air bubbles, unlock both clamps and gently shake
the hose to force air bubbles to the top
MOUNTING THE WL 25 PRO
Mount the WL 25 Pro so
that the level reference
points on the sides are at
the desired finished level point.
A mounting bracket and screw
are included for attaching
unit to a form. The unit fits
on the bracket, making height
adjustments easier.
WL 25 PRO KIT ATTACHMENTS
You can also mount the WL 25 Pro above or below that
reference point, measuring up or down from your marks to
the desired position. Fasten the unit at both top and bottom to
ensure stability. If the unit swings from side to side, your level
points will change and give you inaccurate readings.
USING THE WL 25 PRO
Attach the electronic unit to the work area, then slide the ON/OFF
button to ON. Lower the working end of the hose to keep water
below the level line indicator. Open the clamp on the short top
hose. Move the long length of the hose to the desired level position,
making sure that the hose is not knotted or kinked and will not
be kicked, stepped on, or disturbed. Keep the long end of the hose
lower than the electronic unit until you are ready.
Elevate the end just enough that the water doesn’t run out.
Open the clamp on the working end of the unit. SLOWLY raise the
end of the long hose until the continuous tone just starts. Mark a
line on the work surface matching the level of the water.
Note: If you raise the tube too fast
and the level point is passed and the
intermittent tone sounds, lower the
working tube until the tone stops
and then SLOWLY raise it again.
The longer the working tube,
the more time it takes for the
water levels to stabilize.
Sensing Tube
Level Line
Indicator
Hose Clamp
Power LED
ON/OFF
Switch
Audio Output
Bottom Hose
Top Hose
Hose Connector
Hose
Tube-Cleaning Brush
CLEANING AND STORING
THE WL 25 PRO
In some areas, high mineral content in water may cause a coating
to form on the inside of the sensing tube. The WL 25 Pro’s sensing
tube can be cleaned easily to ensure accuracy. To reduce mineral
buildup do not leave water in tube overnight.
Disconnect the longer length of working hose, connector, and
clamps from the unit. Wet the tube-cleaning brush (included in
the package) with water. Insert fully into the short
sensing tube. Rotate the bristles gently to clean the
contacts, remove brush, and then rinse. Reattach
the working hose and the level is ready for use.
When quitting work for a short time, you can
leave the water inside the hose. Lock the
clamps at each end of the hose, and carefully
coil the hose.
To prevent corrosion when not in use, unclamp
the hose at both ends and drain the water from
the long end of the hose. Store unit with clamps
open in a dry place and out of sunlight.
ADDITIONAL HOSING IS AVAILABLE
Stores that sell this product usually sell or can order additional
hosing in 25 ft. (7.5 m) lengths. You can also call Zircon Customer
Service at 1-800-245-9265 to order additional hoses if your local
store does not carry them. The hose interior diameter is
5
⁄
16
in.
(8 mm) and comes with an additional connector to allow you to
extend your working length.
Tube-
Cleaning
Brush
HELPFUL HINTS
Add a few drops of food coloring to the water before filling.
Replace the water in hose with a mixture of vodka and water.
Always close both clamps after filling tubing.
Be sure to look at the tube from the same angle and mark the
water level at the same spot in the tube.
Use tube-cleaning brush included with tool to clean pins
that detect water level.
• Securely fasten electronic unit at both top and bottom.
• Open both clamps and shake tube gently to force bubbles to top.
• Straighten out the tubing.
Water and tubing are clear.
• Unit swings from side to side.
• Large air bubbles in tubing.
• Kinks or knots in tubing.
Clamps open.
Water level being misread.
Pins are dirty.
• Temperature dropped.
• It’s too cold to work.
Trouble seeing water level.
Water freezes.
Either steady beep or
intermittent beep does
not operate.
Unit does not beep at the
same spot.
Water runs out of tube as
you set up work area.
Level points change.
Inaccurate readings.
WL 25 Pro Kit
Electronic Water Level
Visit www.zircon.com for the most current instructions.
LIMITED LIFETIME WARRANTY
Zircon Corporation (“Zircon”) warrants to the original purchaser (or original user by gift)
that this product will be free from defects in materials and workmanship for its useful life
(not to exceed twenty years from date of purchase). This warranty is limited to the electronic
circuitry of the product, and specifically excludes consumable parts, including batteries,
and software, even if packaged with the product. Defects caused by abuse, modification,
handling contrary to these instructions, other unreasonable use, or neglect are not covered
under this warranty. No liability is accepted for normal wear and tear and minor defects
which do not detract from the function of the product.
THIS LIMITED LIFETIME WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. IN NO EVENT WILL ZIRCON BE LIABLE FOR ANY SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM POSSESSION, USE, OR
MALFUNCTION OF THIS PRODUCT. NO OTHER REPRESENTATIONS OR CLAIMS OF A SIMILAR
NATURE WILL BIND OR OBLIGATE ZIRCON.
Some states do not allow limitations on certain implied warranties and/or the limitation on
incidental or consequential damages, so the above limitations and exclusions may not apply
to you. This warranty gives you specific legal rights, and you may also have other rights
which vary from state to state. This Limited Lifetime Warranty applies only to products
purchased within the United States of America (USA) and Canada. For warranty applicable to
products purchased in all other geographical areas, see www.zircon.com/warranty.
Any in-warranty defective product returned to Zircon, freight prepaid, along with dated
purchase receipt and $10.00 to cover shipping and handling, will be repaired or replaced,
at Zircon’s option. If the returned product is no longer available, Zircon may replace the
product with a similar product of similar function. This is your sole and exclusive remedy
for breach of this Limited Lifetime Warranty. To return product, call the Zircon Customer
Service number below to request an RMA number and return product with shipment
tracking to:
Zircon Corporation
Attn: Returns Department
1580 Dell Avenue
Campbell, CA 95008-6992 USA
Include your name, return address, RMA number, and package tracking number.
Allow 4 to 6 weeks for delivery.
If you do not agree to the terms of this Limited Lifetime Warranty, you may not use this
product and must promptly return it to the retailer, along with a dated purchase receipt
within 30 days of purchase for a refund of the purchase price.
Customer Service: 1-800-245-9265 or 1-408-963-4550
Monday–Friday, 8:00 a.m.–5:00 p.m. PST
www.zircon.com • [email protected]
©2021 Zircon Corporation • P/N 72294 • Rev A 11/21
Zircon is a registered trademark of Zircon Corporation.
Intermittent tone sounds;
level point too high.
Continuous tone sounds;
level point reached.
No tone sounds;
level point too low.
Probable Causes
Solutions
Situation
Filler Nozzle
Mounting Bracket
Mounting Screw
Hose Connector
EN
