[Bob Allen]

For some time now ive been using a single jet stair tool (heavy duty) with a 11006 spray tip in, i use it with my truckmount, but every so often it leaves stroke marks on some stair carpets,which cant always be brushed out, i generally turn psi down to about 300psi, is the jet too big or is it just the pesssure and heat causing these marks, or would changing the jet size help? 

[Joe H]

Bob
You put the question in the part of the forum where items for sale go - and thats items for sale be it carpet cleaning, window cleaning, pressure washing etc etc

Suggest you put it in the very top section which is for carpet cleaners.

[Bob Allen]

Realised my mistake and asked for it to be moved
regards Bob

[Shaun_Ashmore]

I'd go for an 03 IMO

Shaun

[nevil]

Turn it down to 300 psi. What pressure do you normally clean at. I normally go for 200 -300 psi depending on what I am cleaning.

Are you trying to pressure wash the carpets?  I normally try to let the preyspray do the work. Aggitating when needed. I have never seen any benifit in going any higher than 300 psi but stand to be corrected.