Tom,
Be carefull running the hydrant gear at full bore. A few years ago now we were going up the hope valley and stopped at a hydrant at the summit. The pit was so full of shite so I had the bright idea of turning the valve full bore to wash the rubbish out of the pit so I could find the outlet.
I did this, and it took nearly a minuite for the water to clear. Just as we had finished filling up and were putting the gear away a local appeared, of the hairy knuckle dragging variety, telling me to 'switch the water back on' as seemingly he had lost pressure, I replied he didn't want that as it would make it worse to no avail, Father tried to explain that once the pumping station had caught up all would be fine again, but he must have been one of those who should have described themselves as feeble minded on Neils 1901 census form so really we didnt have a hope. He got a bit aggressive, but ignoring him we seemed to get away. It looked like violence was going to be needed at one point, it was not a very nice experience to say the least.
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