ZURN PLUMBING PRODUCTS GROUP
SPECIFICATION DRAINAGE OPERATION, 1801 PITTSBURGH AVENUE, ERIE, PA 16502 PHONE 814/455-0921 FAX: 814/454-7929 WEBSITE: www.zurn.com
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HYDRANTS
Z1375 GROUND HYDRANT
Troubleshooting Guide
Z1375 Troubleshooting Guide
PROBLEM
CAUSE
SOLUTION
Hydrant will not operate when turned on.
Water supply is shut off.
Turn on water supply.
Cannot turn the hydrant on with key.
Hydrant hasn’t been used for a long time – O-Ring
Follow steps 1-2, 4, and 7-8 of the Service Guide.
has adhered to the operating screw and head.
Water does not shut off completely when
Debris between seat and washer.
Follow steps 1-3 and 6-8 of the Service Guide.
hydrant is turned off.
Clean by turning water supply on and flush hydrant.
Washer is worn out.
Follow steps 1-3 and 5-8 of the Service Guide.
Wire draw in seat.
Replace seat.
Hydrant exhibits low flow.
Water supply to hydrant is restricted.
Check water supply to ensure that all upstream valves
are fully open.
Z1375 GROUND HYDRANT
Service Guide
Z1375 Service Guide
Step 1: Shutting Off the Water Supply to the Hydrant
Locate the supply shut-off valve and rotate until water supply is off.
Step 2: Removing the Face Nut and Adjacent Components
Using crescent wrench or 1-1/2 inch open-end wrench, remove the face nut
(2) from head (1) by turning counterclockwise.
Step 3: Removing the Internal Operating Assembly
The internal operating assembly (3-8) can be removed by gripping the square
end of the operating screw (3) with a pair of pliers and pulling straight out.
If the operating screw O-Ring was not the reason for service – skip to step 5.
Step 4: Replacing the Operating Screw O-Ring
Remove the operating screw (3) from operating coupling (5) by turning
clockwise and slip the old O-Ring (4) off, and replace with new O-Ring (4).
Reinstall operating screw (3) into operating coupling (5) by turning counter-
clockwise. (
Note:
Lubricate the operating screw (5) threads and the O-Ring
(4) with Lubriplate FGL-2 if needed.)
If the hydrant shutoff washer was not the reason for service – skip to step 8.
Step 5: Replacing the Hydrant Shutoff Washer
Remove #10-24 NC x 3/8 screw (8) using a flat screwdriver and turning
screw (8) counterclockwise, remove washer (7) and replace with new
washer (7) and new screw (8) turning screw clockwise until tight.
Step 6: Replacing the Internal Operating Assembly
There is a flat or a V-notched boss inside of the hydrant head (1) that keeps
the operating coupling (5) from rotating when hydrant is turned on and off.
With operating screw (3) turned counterclockwise into operating coupling
(5) until it stops, and making sure that a flat side or corner of operating
coupling (5) lines up with appropriate boss, reinsert the internal operating
assembly into the hydrant.
Step 7: Replacing the Face Nut
Insert face nut (2) into head (1), and rotate clockwise until hand tight, then
using a crescent wrench or 1-1/2 inch open end wrench, snug nut (2) tight.
Step 8: Turning On the Water Supply
Locate the water supply shut-off valve and rotate until water supply is on.
