The chart I’m looking at says 8.5. It’s a 3500 psi 8gpm
Try it without the fittings. All you need to set the unloader is a #9 nozzle. Adjust unloader until only a few drops are coming out of the bypass hose while you are squeezing the trigger. Done. Pressure gauge is not needed. You want all the gpm you can get, pressure is irrelevant.
With all due respect, I don’t think you should be giving advice on setting flow unloaders. They’re not the same as trapped pressure unloaders.
1 Like
Point taken.
1 Like
Here is some info from Paul that matches what Alex did
1 Like
I’m sure it aggravating to have a new machine that doesn’t work but I don’t think screwing with it anymore is going to do anything. It really seems to me like you got a bad unloader . Call your vendor Monday and tell them to overnight you another one . And while you have them on the phone ask if you can speak to there quality control department. I’m not about bashing vendors. Most of them are decent some are better than others but non are perfect by any means. What I mean by that is work it out with them don’t make it public who they are until you give them a chance to correct it.
Not saying you would
4 Likes
Will do. This is the plan
1 Like
Update: called vendor and the tech said that since I upgraded my water inlet to 1 1/2” from 1” that I will need to have an orfice size 2 on the k7 to introduce some restriction. I don’t see how me introducing more available water volume would change anything. I would think that the pump will only take what it require wether it’s 1” or 1 1/2. He said the k7 is finicky but this should do the trick. He also said “as funny as it might sound zip tieing a semi kink in the bypass line would help with the problem. Seemed knowledgeable. I’ll update here when the orfice come in in 2 days.
I think there under the impression that you haven’t re routed your bypass back to the tank. Otherwise they are idiots. But the other orfice is a cure for the problem.
So your thoughts are the smaller orfice will introduce enough restriction to solve the problem? I’m missing the idiot part, I’m guessing the kink the hose advice?
The 1.5 inlet has nothing to do with the bypass surge. But yes the 7.2 orfice will fix a surging K7 “ASSUMING “ it’s a good unloader. The theory that you inlet hose has anything to do with the bypass surge would only be feasible if your bypass hose was a closed loop system meaning it worked like a homeowner unit returning your bypass directly back to the inlet side of the pump instead of back to the buffer tank
1 Like
Makes sense. Thanks for the clarification
So what was the verdict ?
It appears to have solved the problem. There is still some back pressure and a bit of a kick, but nothing like it was before. Before it rocked the whole trailer, now it’s barely noticeable. Boy am I happy to upgrade to 8gpm. Anyone on the fence about is it worth it, go for it. It’s night and day from my 5gpm. Everything is faster. I’m having a problem keeping my 20” whisper wash on the ground at times. I think I’ll have to weight it down.
My only complaint is my House wash mix isn’t strong anymore. I have one gp 3-5 hi draw on there right now and it’s not very strong at all.
I’m going to try to increase my draw tube size.
And maybe go with the 8gpm injector. Or maybe a different injector.
Any suggestions?
1 Like
We downstream straight SH all day every day without any issue. After 250ft of hose I get about .05 percent
Except on dark green.
1 Like
Don’t increase your draw tube size, just have to use stronger mix. You need a 2.1 injector or one of Envirospecs super sucker with the different nozzles
2 Likes
I’m drawing straight 12.5 right now with the 2.1
I think it’s the banjo fitting that is causing the restriction thus weak mix. Look in the picture. The 1/4 poly tube id vs the 1/4 poly fitting id
The poly fitting id looks more like 1/8”
From the fitting I’m running into the 15gal drum with 1/4 pvc tubing.
I’m thinking it is the fitting?
1 Like
You’re right, that looks pretty small. Try just dropping your hose into the mix or big measuring device and test how much you pull versus going thru the fitting for 60 sec.
1 Like
I would eliminate that little bulkhead barb fitting and run the draw tube straight to the bottom of the tank as Racer suggests. Don’t bother with a strainer. Just cut the end of the hose at an angle, and use a piece of 1/2 or 3/4 pvc to keep it running straight to the bottom.
Less connections you have in your draw line, the better.
Increasing your size injector will reduce your draw rate, not increase it.
1 Like
