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9 Cards in this Set
- Front
- Back
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The British standard for hydrants |
65mm round thread outlet Minimum water flow rate of 2000 litres per minute at a minimum pressure of 1.7 bars Anti-clockwise opening |
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Different types of hydrant plates |
Standard hydrant plate Directional hydrant plate Double hydrant plate |
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How to read a hydrant plate |
The top is the size of the main The number on the bottom is the distance |
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What equipment makes up hydrant gear |
Double headed standpipe Hydrant bar Hydrant key |
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The water supply system |
Starts from reservoirs Sent to treatment plants Pumping station Trunk mains And service main |
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Procedure to setting into a hydrant |
Removing hydrant cover Connecting standpipe to outlet Flushing the hydrant |
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Action to be taken when encountering a magnetic leak detection device |
Does not need the hydrant valve to be opened for it to work . Can be removed safely and use the hydrant and reattach it when done |
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Actions to be taken when encountering a screw down detection device |
The valve is left open ; when needed for operational use needs the valve to be shut off . Unscrew valve and remove Potential residual pressure Once finished using it , do not reattach and leave it inside hydrant Contact water office when returning to station |
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Hydrant testing |
a visual inspection should be under taken yearly All hydrants tested every four years - April to September |
