On 04/05/2011 17:56, Roger Mills wrote:
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.

It would confirm the supply is adequate.

--
Dave - The Medway Handyman www.medwayhandyman.co.uk