On 01/05/2011 20:55, Rick Hughes wrote:

"The Medway Handyman" wrote in message
...
Page 5 part 60 here;

http://www.dolmar.nl/images/files/tekeningen/HP11.pdf

Spring pressure needs increasing 'very slightly'. Or a new valve.

p.s. Not using Hozelock 'Waterstop' connectors by any chance?



Great explanation .,.. I am away for a few days with work ... will take
a look, maybe a clean will fix :-)
Don't suppose you have same parts list / drawings for the Hobby 88 ?

It is a rectangular box type, rather than upright.

That would make it pretty old. They may well have used the same design
unloader/by pass on the newer models though.



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