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6 Cards in this Set
- Front
- Back
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What equipment makes up hydrant gear |
Double headed standpipe Hydrant bar Hydrant key |
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When are hydrant tests carried out |
Visual inspection annually Tested every 4 years. April - Sept |
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What are the two types of leak detection device |
Magnetic - Can be replaced after using hydrant Screw on - Should not be re-fitted after using hydrant |
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Explain the mains water supply |
Reservoirs Treatment plant Pumping station Trunk mains Service mains |
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Explain hydrant plate markings |
Yellow plate with balck H Plate shows double/single hydrant Number between arms is mains size mm/inches Number between legs is distance to hydrant m/feet Some plates give directions to nearest hydrant |
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What is the British standard for hydrants |
65mm, round thread outlet Minimum water flow flow 2000lpm at 1.7bar Anti-clockwise opening |
