DS Injector question?

I have a DeWalt 4gpm/4,200psi machine.
My Downstream Injector is “built-in” meaning it’s part of the one-piece brass molded pump/unloader.
My Question: I want to install a Downstream Injector Bypass Kit to capture more flow/pressure with my surface cleaner as well as shoot a bit further with my MEG nozzles. The DS Injector Bypass Kit doesn’t include an Injector, so I bought an Adams Injector and I am confused about the fact that I will now have 2 DS Injectors (even though I won’t be utilizing the “built-in” DS Injector because my solution hose will be connected to the Injector - when needed - to the one installed in the Bypass Kit. Is this going to be a problem? How can I - or is it even possible - to ‘disconnect’ the “built-in” DS Injector?
If you understand my question and are a seasoned pro with DS Injection, your input would be most welcomed.
Thanks. M. M. in Houston

First off the benefits (if any) of a bypass are negligible especially on a consumer-grade machine. I would just plug the first injector hole and ditch the bypass for now.

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I am by no means a veteran, but I have made the transition from built-in DS pump (aka. consumer grade) to a real pump that requires an attached injector if you want to DS.
However, if you are going through all this trouble because you do not want to draw chemical when rinsing, for example, the tips will provide the right pressure to either draw chemical or just pure water.

I don’t really understand why you would be getting into bypasses and more ds injectors.

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On second thought, if the motor on the DeWalt is worth keeping, you might be better served getting a quality pump and at DS on quick connect.

And just not bother with all that by pass and extra DS. BTW, even if your machine is good, your pump is crap. And it will die long before the engine/motor. Might be a good idea to save yourself the headache of trying to fit a good DS kit on a crappy pump.

Hope that helps…

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As @pressureguy said, you can just take the barb off the built in injector and plug it.

I get that, but why would you bother doing that? If you are going through that much trouble on a crappy pump, just move on up.

Take off the injector that came on the machine. Replace it with a threaded male plug. Then you can attach the injector you bought. Send the kit back. No need to bypass something that can be removed. True statement about little is lost.

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I leave mine in all the time and just throw the draw line in my buffer tank. Don’t even notice a difference.

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Thanks for your advice.
After reading it, I pondered on it and took an inventory of the Pros & Cons.
Perhaps your right. In fact, you are.
Thanks for your straight-forward insight. Most grateful. M.M. in Houston

You make perfect sense.
Thanks for your input.

I agree with you. Thanks.

@pepperking72 is your machine running at the moment and/or giving your trouble? If its working then just plug the built in injector and use the one you bought and keep working. I made the mistake of buying a big box store machine as well, but it worked great and made me money until my pump (a Cat pump that I believe Dan the window man said in his blog was his ideal pump) decided to crap out on me after only 3 months. I don’t know anything about the Dewalt machine or anything about the pump that is on there. But if you spend a few minutes on this site you will find that everyone has their own opinions about pumps as well as everything else. So if its working, then keep running it until it doesn’t or until you decide to upgrade to a better machine. So either plug it or as @zfranks mentioned just remove the built in altogether and keep going. Good luck!

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That built in injector will fail sooner than later. Plug it up. Put the quick connects on your new injector and plug it in. Boom problem solved.

Easy way to plug it is cut off a small piece of hose, attach it, and plug it with an appropriate sized screw. I have that same machine so feel free to message me if you have any other questions

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@SurfaceMedic I hope I am not derailing the topic, but regarding the CAT pumps: When I wrote that blog, I was still in the early stages of shopping for a pump, and CAT seemed to be all over the place, with great reviews.
However, one of our members stated that the great pumps “don’t need to advertise, they just make pumps.” I found an Italian pump called Bertolini that was over half the price of a comparable CAT pump, and so far I have no complaints.
CAT may have been my “ideal pump” but not from personal experience.

I’m not hating on ya @DantheWindowMan. My only point in even pointing that out was simply what one person thinks is the best pump out there, there is someone else that thinks it is junk. I personally will never own another Cat pump after my experience. He just asked a simple question that I don’t think you actually understood, and you called the mans pump junk and basically didn’t get why he would want to change injectors on a crappy pump (correct me if I am wrong). Maybe it is, maybe its not. I honestly have no idea and honestly don’t care. But if its running and making him money then in my opinion rock on until it quits. That is exactly what I was doing until mine quit on me. My only point is what was gained by you calling the mans equipment crap when he just asked a simple question which had nothing to do with the quality of his pump? Might be crap to you, but if its working and making him money I bet he doesn’t think its crap. Anyway, no worries and like I said, not hating on you or anyone else.

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You do not even have to plug the built in injector. I had this discussion with
Bob at Pressure Tek. The last injector downstream will be the only one that
pulls.When Bob says it is so, trust me it is so!

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Thanks for the in-depth insight.
Super grateful!

  • BTW, now if I could ask one more please…I got a good deal ($2.68/ea) on 25 1/gl jugs of 10% SH.
    Now assuming there still relatively “hot” , and I have a 4gpm / 4,200psi (AAA pump powered with the 12Hp Honda GX 390 engine) and I have a housewash coming up that’s really bad with green algae left from Hurricane Harvey last August.

What’s your advice for a 5/gl bucket of solution for a housewash if the pump is dilutes the solution 10:1 according to the Owner’s Manual? That’s 50 gallons of garden hose water diluting 5 gallons of solution?
I’m thinking about just filling the bucket with 5 gallons of straight & undiluted 10% SH and 5 oz of. “eLEMONator” whitewash/bleach-additive from www.pressure.com?
What’s your suggestion? Thanks :pray: Confused in Houston,
Mitch M.

I appreciate it. He told me the same thing yesterday. :rainbow::droplet::sweat_drops::droplet::sweat_drops:

Do you know what your injector is pulling? If you have a 10:1 I’d go straight SH and not diluted. That was the recommendation I got from some on here and its worked well for me. But you need to know what your injector is pulling. If your not sure, do a bucket test and verify the ratio.

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