So I searched some words and I knew I was going to get a buttload of query hits back.
I was discussing with someone that does houses. They use the injector bypass because they feel it restricts flow thru the injector. Has anyone done a GPM flow test thru the injector and one with the bypass? I just don’t see it restricting more than 10% to be honest, don’t ask how I came up with that number.
It technically does but not enough to even warrant doing anything about it.
For washing houses it doesn’t really make a difference. When surface cleaning with my 8gpm it makes all the difference.
I have been using a 1.8 on my 5.5gpm machine and you can actually hear the engine straining to push enough water through that little hole when rinsing or surface cleaning. My 2.1 isn’t as bad, rinses decently enough.
I have done some testing yes but until I get my high pressure digital flow meter I won’t have numbers for you. If your curious as to the difference just take some indexing pins or drill bits and look at the size difference then do some math. The size injector orifice you run and your machines gpm are all factors to the amount of difference though. 5.6 gpm with an Allison injector and #2 proportioner the bypass is a major difference. 8gpm or more your flow and psi difference from bypassing very noticeable. Unless you have a remote to shut off your chem you may as well turn a bypass as your going back to the machine either way so for $80 why not use the flow you paid several 1,000’s for. I can get into tips and distance and knock down power and a whole slu of other reasons to have one but its an easy and beneficial way to shut off your chems.
Btw if anyone has a 1/2” 3000 psi GPI digital turbine I will buy it for $600. I won a bid on one and the seller messaged it was out of stock. Trying to save a few bucks if I can.
I ran one with my 7gpm. I have it set up like @Racer, with the injector on the bypass loop. After exactly 30 seconds, I get about a pint or so more flow bypassing the injector than running through the loop with the injector dip tube in a bucket.
Thats done on an open flow test I have to assume correct? Open flow vs back pressure flow should make the equation change quite a bit.
I tested with a 0060, as that’s what I’m rinsing with
Gotcha, very cool. I use a shooter an a 0080 I keep saying it but I’ll get a tester one of these days I better just sack up and spend $1,000 instead of being a cheap skate on eBay but it fun haha.
With 8 gpm it makes exactly 1 gpm flow rate difference. Thats the reading with the injector on and pulling fluid at open flow 7.44 gpm and bypassing is 8.44 gpm. This is the exact reading at the ball valve on a 200’ hose.
So maybe it’s more than flow. Could it affect pressure? Otherwise how could it not be noticeable while rinsing houses but is when surface cleaning?
All I know, is at 200’ of hose and no injector my surface cleaner wants to float about a foot off the ground and I have to put a weight on it. Injector installed it just kinda skims.
