Apollo Conbraco 20, 21, 22, 23, 24 Installation Manual

WARNING:

VALVE MUST BE USED IN THE FULLY OPEN
POSITION FOR PROPER OPERATION OF BALL
CHECK. FAILURE TO DO SO COULD RESULT IN
BODILY INJURY AND/OR PROPERTY DAMAGE.

NOTE: NOT ALL WATER GAUGES ARE
EQUIPPED WITH BALL CHECKS.

WARNING!

WATER GAUGE & GAUGE GLASS

TOP GAUGE FITTING

VESSEL
WALL

GAUGE
GLASS

GLASS
PACKING
NUT

GLASS
PACKING

GUARD
ROD

PACKING
GLAND
(OR
FRICTION
WASHER)

BOTTOM
GAUGE
FITTING

DRAIN
VALVE

BALL
CHECK
VALVE

ASME
AUTOMATIC
BALL
CHECK
VALVE

WASHER

INSTALLATION & MAINTENANCE GUIDE

(20, 21, 22, 23, 24, 25 Series)

INSTALLATION

Only properly trained personnel should install and
maintain water gauge glass and connections.
Remember to wear safety gloves and glasses during
installation. Before installing, make sure all parts are
free of chips and debris.

1. Read all warnings and instructions before

performing installation or maintenance.

2. Apply thread sealant or tape to pipe threads. Install

top gauge fitting (fitting without a drain valve) into
the uppermost tapping, wrench tighten the getting
until it is snug and the glass outlet is pointing at five

o’clock (about 1/8 turn from its final downward

vertical position).

8. Tighten (by hand) both glass packing nuts and then

tighten ½ turn more by wrench. Tighten only
enough to prevent leakage. DO NOT OVER
TIGHTEN! If any leakage should occur, tighten
slightly, a quarter turn at a time, checking for
leakage after each turn.

3. Install the bottom gauge fitting (the fitting with a

drain valve until it is snug and the glass outlet is
pointing directly upward.

4. Remove glass packing nut, friction washer (or

packing gland, depending on the model), and glass
packing from each gauge fitting. Slide the packing
nut, then friction washer or packing gland and then
glass packing onto each end of glass.

5. Gently insert one end of the glass into the top gauge

fitting. Keeping the glass inside the top fitting,
gently rotate the top gauge fitting clockwise until
vertically aligned with the bottom gauge fitting,
then insert glass into bottom fitting until glass
bottoms out on the shoulder inside the bottom
fitting.

6. Carefully raise glass about 1/16” and slide lower

glass packing down until the glass packing contacts
the lower gauge fitting. DO NOT allow the glass to
remain in contact with any metal!

7. Carefully slide upper glass packing up as far as

I-5334-00 REV K Page 1

possible.

WARNING:
SAFETY GLASSES AND GLOVES SHOULD BE
WORN AT ALL TIMES WHEN WORKING WITH
OR EXAMINING WATER GAUGE GLASS AND
CONNECTIONS.

IMPROPER INSTALLATION OR MAINTENANCE
OF GAUGE GLASS AND CONNECTIONS CAN
CAUSE IMMEDIATE OR DELAYED BREAKAGE
RESULTING IN BODILY INJURY AND/OR
PROPERTY DAMAGE.

MAINTENANCE

Examine the gauge glass regularly for any signs of
clouding, scratching, erosion, or corrosion. The glass
should be inspected daily until the need for replacement
becomes apparent. This will help establish the routine
inspection and routine replacement schedules.

CLEANING

Use commercial non-abrasive glass cleaners to keep the
glass clean. Use diluted acids such as Hydrochloric
(muriatic) acid when regular cleaners do not seem to
work. Do not use wire brushes or any other abrasive
materials which could scratch the glass.

INSPECTION

Examine the surface of the glass for scratches,
corrosion, chips, cracks, surface flaws, or nicks. To do
this, shine a very bright concentrated light at an angle of
about 45 degrees. A defective glass will glisten as the
light strikes imperfections. Glass which appears cloudy
or roughened, will not respond to cleaning, and should
be replaced.

STORAGE

Keep gauge glass in original packaging until ready to
install

U.S. SAFE DRINKING WATER ACT WARNING:

It is illegal to use products that contain lead for potable water
services (Water intended for human consumption) in the
United States.

CALIFORNIA PROP 65: WARNING: Cancer and

Reproductive Harm - www.P65Warnings.ca.gov

FOR NON-LEAD FREE VALVES: It is illegal to use this product in
the United States for potable water services (water intended for
human consumption).

FOR LEAD FREE VALVES: This product complies with U.S. Safe
Drinking Water Act (SDWA). Suitable for potable water
applications intended for human consumption.

WATER GAUGE GLASS RECOMMENDATIONS

DO’s

DO verify proper gauge has been supplied.
DO examine gauge glass and packings carefully for damage

before installation.

DO install protective guards and utilize automatic ball

checks where necessary to help prevent injury in
case of glass breakage.

DO inspect the gauge glass daily, keep maintenance

records, and conduct routine replacements.

Do protect glass from sudden changes in temperatures such

as drafts, water spray, etc.

DO NOT’s

DO NOT use the glass if it contains any chips or any other

visible signs of damage.
DO NOT reuse any tubular glass or glass packings.
DO NOT subject gauge glass to bending or torsional

stresses.
DO NOT over tighten glass packing nuts.
DO NOT allow glass to touch any metal parts.
DO NOT exceed the recommended pressure of the gauge or

gauge glass.
DO NOT clean the gauge or gauge glass while pressurized

or in operation.

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