Hi
I've got a bog standard 2 jet wand that does me just great, here is a link (first one on the page)
http://www.cleansmartsupplies.co.uk/acatalog/Carpet_Cleaning_Wands.htmlAnyways, for the last 3 days i have been having some troubles with it!

Basicaly, if i set pressure to anything above 110 psi, there is a jolt and there is no spray coming out of the jets! But the pump does carry on working.
I have tried all my hand tools and stair tool and they all work fine on full pressure.
Another thing which i find strange is, if i keep the trigger held down before i turn on the pump the higher pressures are achived! until i stop "wanding" for a couple of seconds then the "jolt" happens

Now, when this started happening i changed the jets (they where 7 months old) and also had a valve repair kit kicking about so used that! and this didn't make a differance.
I contact Matt at cleansmart and he siad it'll be the male quick connect (that you attch the soluation line to) i fitted this on today but the bloody thing still "jolts"

poo
Does anyone have any ideas?? this has never happend to me before. I took the whole valve system apart yestarday night, not sure what i was looking for but its still being a pest

p.s. there doesn't seem to be a filter thing on the wand either...
thanks in advance
tony