"Roger Mills" wrote in message
...
On 05/05/2011 18:40, The Medway Handyman wrote:
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.


But the OP has already said that he gets good flow (without a nozzle) when
operating the trigger without switching the machine on - as one does to
purge the pipework of air.
--


Yep to be 100% sure ... connect up water hose, operate lance trigger but
leave pump 'off' get continuous low of water, reaches about 30'