Matt, if your running your 50+odd meter of hose then your venture won't work properly due to the pressure needed to force the water up the hose, you may be able to get a larger/higher psi activated venture but not sure...
Heres what I do (and it works brilliantly! Ideal for your application).....
Buy a foam bottle from Damien at q services, and 2 or 3 meters of 1/4 braided hose, also a small chemical injector filter (1/4 inch barb type, although this item is not compulsory).
When you get all your bits, unsrew the bottle and take the short 1/4 hose off the foam bottle that goes inside the bottle, replace it with your 2 - 3 meter length of 1/4 inch hose and put the filter (if you have one) on the end of it.
All you need to do now is drop the pipe and filter into your drum of tfr and fire away!! I can text you a picture of mine if you need one.
it works great and foams up every thing in sight with out the need to keep filling a little 1 litre botlle up. I have run hypo through it and all kinds, works everytime!
Be carefull though if you have a k type unloader as this may make your unloader pulse, if this is the case, speak to Damien and see if there is a fowm bottle to suit.
Hope it helps
