On 03/05/2011 23:46, John Rumm wrote:


What happens if you disconnect the pressure hose and let water squire
out the output spout - does it still surge?


I'm not sure that would tell you very much, because it wouldn't be able
to produce any back pressure. I would expect it to pee water out
continuously even if (say) the by-pass valve were faulty.
--
Cheers,
Roger
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