FSE360_HYDRANT TEST PROJECT
Multi outlet dry barrel hydrants
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Pick a Flow hydrant and a static/residual hydrant. The residual should be the next one line and downstream to the flow hydrant.
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Remove one 2 ½ cap from the static/residual hydrant. Remove two 2 ½ caps from the flow hydrant. Flush both hydrants until clear. Shut both hydrants.
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Attach one cap pressure gauge on the static/residual hydrant, and then open the petcock. Open the hydrant and bleed air thru pet cock, close pet cock and take static reading. Leave open.
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Place on cap gauge on one of the open 2 ½ orifices. Completely open the flow hydrant, insert and record a pitot reading from the flowing, open 2 ½ orifice. Remember to bleed air from pitot by pushing button on handle for several seconds. Also, open and bleed any air on the cap gauge, then take a reading while hydrant is open and water is flowing.
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Take and record the residual pressure on the hydrant cap gauge on the flow hydrant.
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Take and record the residual pressure at the (residual) secondary location.
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Close the hydrant slowly being careful not to cause a “water hammer” and spike the pressure above the normal static pressure on the gauge at the secondary location. Check hydrant for proper drain.
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Check and record coefficient of flow orifice.
ALWAYS .9 WHEN USING HOSE MONSTER
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Verify that all valves closed properly, are not seeping or leaking, and that the hydrant is ready for service.
Dead |
Xxxxx |
Black |
Class C |
Less than 500 GPM |
Red |
Class B |
500-999 GPM |
Orange |
Class A |
1000-1499 GPM |
Green |
Class AA |
1500 GPM & above |
Light Blue |
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Perform math by following formula on hydrant flow report. Use wire brush to clear any old loose paint on bonnet, and paint bonnet according to chart below:
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Next remove and clean all threads of the other caps on the flow hydrant. Grease the fitting at the top if it has one.
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Remove cap gauge from flow hydrant leave cap on residual hydrant.
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Flush next hydrant down from previous residual hydrant (former residual hydrant becomes flow). Once the water is clear, place cap gauge on residual and flow test hydrant.
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Place flyers in mailboxes as you go thru neighborhood!
DETAILED ASSIGNMENT