Hey fellas, I’m new to pressure washing, and I’ve got a problem.
My setup:
Honda GX390
Direct drive 4200psi 4gpm
'150 of high pressure hose.
2.1mm downstream injector
So here’s my problem, I can draw SH without a gun on my high pressure hose. But as soon as I put my 12 GPM general pump gun on there it will not draw SH. One guy from Pressure Tek told me I needed a 1.8 mm injector if using more than '100 of hose. I didn’t think that made sense since that would create more pressure and don’t you need a larger orifice to draw? Any ideas?
Welcome to the forum. Are you using a tip on your gun when testing the injector? If so, what size orifice? Do you have another gun you can test with?
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What kinda injector are you using?
Here’s an article from PT about how pressure differential on the injector is affected by length of hose
I’ve tried without a tip and also with my J rod specifically made for my 4gpm machine from Pressure Tek. I’ve used 3 different guns, all quality brands and proper gpm and pressure rating. Any ideas on what I can do?
2.1mm Adam’s
Pressure Tek is correct, I couldn’t draw @ 150 ft ,but could @ 100 ft, got a smaller orfice ,bingo. Imo after that Adams takes a crap,go with the GP high draw. Last longer ,draws better, and is cheaper, and no orfice swapping around, from a 100 ft,150ft,200ft, @ same draw ratio…$16…Its all about the venturi affect created ,read the article @PristineGC sent you
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Agree 100% with @Hotshot, General Pump injector is the best and cheap to boot. I also run one size down (2.1mm) on 250’ sometimes 300’ of hose no problem. Most on here run DS injector one size down
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@Cdr1013222 and when you buy your new GP injector, buy at least 2
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My 8gpm machine draws just fine with a 2.1 injector on 250’ of hose. Never tried 300’ but I would bet a shiny new nickel that it would draw. You likely need to go down a size. GP high draw works great. I have one that’s been going strong all season. Of course, I don’t wash 50 houses a week yet either.
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Thanks for all y’alls help. I just ordered 2 GP high draw 1.8mm injectors. I’ll let y’all know. I hope it works.
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I’ve tried them all. Adams $$,Envirospec, super sucker$$$, SS super sucker $$$$ etc…I finally found GP high draw from pressure Tek $ . I work it 30,40 hrs a week on both. DS, High PH soaps, Citric,Phosphoric and HF acids through them ever time. Make sure you rinse after every job and it will last ya’ll a long while. Also make sure you don’t have any air leaks between your drop tubes and the injector, and leaks in your high pressure line,whip line,hose reel…hope this helps ya
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I rinse mine after every job. Takes two minutes and definitely helps
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I run a 3 way ball valve to rinse my injector & it lasts all season just about. also I use 225 feet of hose, and still use the 3-5 gpm injector. No issues. Get the gp high draw for sure.
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Any suggestions for a shut off ball valve on high pressure line for switching from gun to surface cleaner? I got one off Amazon a couple weeks ago, and already crapped out. JUNK! Links appreciated.
The chicks have left the nest
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The Adams injectors suck. I had a problem with draw on them too. Buy the GP high draw. I use a 2.1 for a 4k psi 4 gpm GP high draw with no problem. 250’ of hose.
industry standard
Might as well get it and a mosmatic while you’re getting that hi draw injector.
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This kind of information is why you join a site like this…
