BE Pressure PK-85400003 Up Stream Chemical Injector-High, 3500 PSI, 8.0GPM, Brass

Here are some instructions that should have come with the device (this is a lot, most people only need the first 3 bullet points):- The injector has three liquid ports. I will call these hose input, hose output, and suction line.- The injector has two valves, one is an obvious knob, hereafter "the main knob", that sticks out of the side of the injector. The more you loosen the main knob the more flow is allowed from the hose input to the hose output. Tightening the main knob all the way will result in maybe 10% of the water passing through; it does not completely stop the flow. The second valve, hereafter "the suction valve", is actually the knurled conical thing on the barb that leads to the suction line. The more you tighten the suction valve the more you limit the flow from the suction tube. Tightening it all the way will prevent all flow from the suction line.- Test the system with plain water before using it with fertilizer for gardening, or soap for pressure washing etc. To test put all the valves in their most open position. It will be easy to know you are opening them because they physically move away from the injector body as you open them. Submerge the filter cage completely in a bucket of water. For this test disconnect everything downstream, we want the least resistance to flow as possible. Turn your hose fully on, you should see the clear suction line fill with liquid. If this does not happen see troubleshooting steps at the end of this post.- Now that you know it works with nothing attached to the hose output, try it with whatever you intend to use attached (e.g. a pressure washer, a garden hose). You need a certain minimum amount of flow for it to work, so if you attach something that is really restrictive (e.g. a really long narrow hose, or a garden sprayer with really small openings) it might not work. If it stops working see the troubleshooting section below.- (Optional) Calibrate the mix ratio by getting two containers, one small, and one large (at least 20 times as big as the small one, 1 quart:5 gallons is 1:20). With your desired equipment hooked up to the hose output fill up the small container completely and empty the big container before starting. Now fill the big container stopping when the small container runs dry. Use the small container to empty the big one and count how many times you fill the small container. If you it takes you X small containers to empty the big one then your mix ratio is 1 part from the suction line for every (X-1) parts from the hose. For example, emptying the big container with 10 small ones would be a mix ratio of 1:9. If the ratio is too high you can close the suction valve partially and repeat the test.Troubleshooting:- It wont suck anything, even with nothing attached downstream-- Check the suction valve and the main knob are totally open-- Check that your water pressure is at least 25psi. If you have really low pressure it might not be able to get the flow fast enough for it to work at all.- It stops working once I attach my downstream equipment:-- Your downstream attachment is restricting the flow too much. If your downstream attachment can be set to use more flow, or if you can make the path less restrictive with a wider or shorter hose you might be able to get things working. For garden sprayers remember, a gentle shower setting that only shoot water a few feet is very unrestricted. A jet setting that sprays 20 feet is very restrictive. Just like using your thumb to partially block the end of a hose to make it spray further.- It sucks water well, but not not my chemical:-- The suction liquid needs to not be too viscous and thick. If your chemical is really viscous try pre-diluting with water before trying to suction it.- It backflows water out of the suction line-- I was never able to get this to happen at my house, you might have really high water pressure. Try using a hose pressure regulator before the hose input.- It was working fine and now it isn't-- The internal liquid channels in the device need to be small in order for it to function. Make sure you have a filter on both the the hose input side and the suction side. The little filters that are often inside the o rings of hose fittings are usually about 50 mesh. You can buy buy finer 100 or 150 mesh filters to be sure your don't have issues with clogging.- I am not able to fine tune the mix ratio with just the suction valve-- You can also use the main knob to fine tune the ratio. The more you restrict the flow with main knob, the less suction you will generate.- It never sucks up all the liquid in the chemical container-- Make sure the container is not air tight. You need air to get in and replace the liquid as it leaves the container.-- Make sure the suction filter is as low as possible in the chemical. With the default filter you probably will never get it to suck up the last 1/2 inch. You could DIY some kind of container where the suction line is at the lowest point if you really want to get every last drop. Make sure you still have some filtering, you don't want to clog the injector.

Let it be known that this is an "up-stream injector." Meaning it is meant to be used between the water source and the suction side of the pump. And a "down-stream injector" attaches to the pressure side of the pump.I don't remember if that info was given when I purchased this or not. Anyway, I will find a way to use this, however I still don't know what the second valve controls? No instructions were included, so.... It's good solid brass tho.

This may be a good product but I wouldn’t because it was damaged when it arrived.

I bought this flow suction valve to make a tree foilage sprayer for my pecan trees. This valve is heavy duty brass, has appropriate "garden hose" thread attachments on both ends, and does an adequate job mixing for a sprayer. I just opened up the adjustments to the full volume setting, and had my zinc sulfate mixture in a five gallon bucket. I took a 100 feet hose, cut it in the middle, and added hose repair attachments to the cut section to fit the flow suction valve.If you wanted to figure out how much was mixing in the flow valve, you would need a way to measure volume extracted over time, and an ability to catch what was mixed in the outlet end. This type of math is too much detail, so if you want this to be something you could measure a particular application, say so many gallons per volume of water mixed, you would need some serious volume measuring devices, such as beakers, buckets, and graduated cylinders, along with a stop watch. I think it could be done, but if you are just using this with "redneck" engineering, it will work just fine.The suction hose is clear vinyl plastic, so you can see your liguid moving up the hose. The filter on the end is a nice touch. I used a heat gun to heat up the plastic hose so you could straighten it out more. I attached the valve loosely on a board so I could place the suction hose in a 5 gallon bucket. I also built a spray wand of electrical conduit for reaching the high leaves of the trees from the ground.I would give this item five stars, as it worked as intended for my application.

I found it is not good to put chemicals through the pressure washer pump due to the damage it can cause. however this device might be handy for spraying chemicals on your lawn using just your garden hose.

I would certainly buy it again. Think it’s worth the money.

I attached it to my power washer, but since there were no instructions, it took me a minute to figure it out. There are two valves. One opens/closes the water from the hose to control how much suction there is. The other opens/closes the injection tube to control how much soap/chemical gets mixed in. Thing works amazing once you figure that out.

First off, zero instruction to tell you how to properly operate/install it even though it quite self explanatory. Nothing from the manufacturer’s website either. While using this, it drew most of the water straight from the bottle of fertilizer i was using so there was almost zero pressure and next to no water coming out of the hose. Again, no instructions to help out so i fiddled with every knob and adjustments I could find and no improvement. Just concluding that its a piece of junk. Don’t waste your money.