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Caution on Hydrant Installation
1. Appropriate buried depth should be maintained for freeze protection
2. Gravel and sand are supplied sufficiently around the drain hole before burying to enable complete drainage.
3. On piping work, the foreign substances inside the pipe must be removed completely to prevent seat damage.
4. Excessive operation must be avoided on test operation after installation, and foreign substances and leakage must be inspected first.
Hydrant Disassembly & Assembly Method
1. Close PIV to block the water supply to fire hydrant.
2. Hydrant wrench is used to open the Hose Connector Cap, and the Operation Nut must be opened completely to the Open direction.
3. 24mm spanner is used to first disassemble the fixed bolt on the hydrant cover (For OPEN/CLOSE Indicator-type hydrant, the cover must be lifted slightly to separate the housing and the connected high-pressure hose, and caution must be taken not to change the Indicator Shaft), and The cover is removed.
4. 19mm spanner is used to disassemble the fixed bolt on the bearing cover flange, and the Operating Nut turned counter-clockwise for complete removal.
5. 24mm spanner is used to disassemble the remaining fixed bolts on the housing, and the housing is removed carefully to prevent damage on the O-ring inside the Rod Sleeve and Housing.
6. Seat Wrench is fit on the upper square rod to be turned slowly counter-clockwise, and the Valve Seat Set is removed from the Drain Ring.
7. The hydrant is lifted carefully to have no damage from impact, and the damaged parts are exchanged.
8. The hydrant is reassembled in the reverse order of disassembly.
(The OPEN/CLOSE Indicator-type hydrant is assembled to prevent the high-pressure hose from twisting when assembling the hydrant cover, and the hydrant wrench is used to close the hydrant. The Indicator Shaft must be at the Close indicator line.)
Caution on Hydrant Disassembly & Assembly
ㆍThe disassembled parts must be placed on top of protective pad to prevent any foreign substances.
ㆍAt least two workers must work in one group on disassembly due to heavy parts.
ㆍGrease must be applied sufficiently on reassembly.
ㆍBolt & Nut must be fastened completely to prevent leakage on the joints.
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