[Rob@Blast off]

Wfp Backpack, x jet and sniper nozzle does the trick for me.

[Smudger]

What's a sniper nozzle?

Darran

[Rob@Blast off]

Its a long range low pressure zero degree nozzle i wasn't a fan at first but use it loads now.
https://youtu.be/Wfotfv4bIek

[Smudger]

Yes found them, @ £15 well worth a try.

Where do you put a chemical pick ? I have them at the pw but they don't seem to draw chemical when using 50plus meters of hose 

Darran

[Ben Marriott]

Chemical pick up at the machine works according to the Venturi effect whereby a pressure moving forwards creates a vortex with the hose and creates a back pressure which draws the chemical upwards. Strictly speaking this effect cannot be guaranteed to work over 10-15m though of course it usually does.

[Rob@Blast off]

I just use it to pre wet and rinse off, i think you could put it on an xjet but never tryed

[Smudger]

Rarely for me 

What nozzle would be best to encourage the correct vortex and back pressure ?

Darran

[Smurf]

Chemical pick up at the machine works according to the Venturi effect whereby a pressure moving forwards creates a vortex with the hose and creates a back pressure which draws the chemical upwards. Strictly speaking this effect cannot be guaranteed to work over 10-15m though of course it usually does.

That's why I guess some don't like downstreaming as also using strong chems can destroy high pressure hoses, couplings etc  eventually too.

[Ben Marriott]

Precisely why I never fit chem pickups to our machines - I don't take them off the Dual machines but I don't fit them. I always reckoned the GP stainless Soap Shooters which pick up at the lance.

[Smudger]

That's pretty much the same as an X jet then

Darran

[Ben Marriott]

Pretty much - just stainless steel and less expensive.

[Smudger]

Yes I'll give you that 

Darran

[Smurf]

Those gp soap shooter seem cheap for a good reason.
I suppose they would be no good if wanting to change the type of nozzle you use as is a fixed so say long range. Also you can't run the chem mix as low a 1-1 ratio if you wanted so all in all a waste of time surely Ben?

[Ben Marriott]

They offer the same adjustment as a downstream pick up - when combined with a proportioner (if you want to use them) you can get more flexibility. As for the fixed jet - most of our customers use them for washing trucks, buses and cars on the electric side so it makes no real difference.

[Smurf]

So what set up would you recommend for K-render cleaning Ben?

[Ben Marriott]

I would go along the lines of the american systems.
The best way would be with a teflon air driven pump.
Failing that a pump designed to handle acids and chlorine's.

[chris scott]

For k-rend cleaning.

[chris scott]

or

[Smurf]

Thanks Chris, Which one do those petrol driven sprayers do you prefer (including the pro's & con's) as I take it you have both?

[chris scott]

I don't have a favourite.
The tank version is handy for cladding …we run 3 waterfed poles from it with a soap solution . Downside it takes up a fair amount of room in the van.
The "pump" only is good when used in conjunction with a Dosatron feeding it with bio-cide. It cuts down the amount of waste product at the end of the job and insures accurate chemical application,
Both machines are perfectly capable of either job. For cleaning K-rend they are a "must have" otherwise it's like trying to clean driveways with no pressure washer.