9/22/2023 0 Comments Venturi dredge pumpIt is a general rule of dredges that it is not practical to dredge feet of overburden greater than the inside diameter of your hose in inches. So weight and cost are the trade-offs for the volume you can process, and practically speaking, the depth of bedrock you will be able to reach. When you are sitting down to plan the designs of your own home made gold dredge, probably the first question you will want to ask yourself is “What size of dredge do I want to build?” The bigger your dredge is, the more material you'll be able to process, but the more it will cost and the more it will weigh. Sometimes good used dredge parts are available to start a homemade dredge. The more general knowledge you have about dredges before you begin your design, the better your construction plans will be. The club members may even let you have a few minutes behind the nozzle so that you can get a feel for the whole experience. Take some pictures of the dredges while they're in operation. Another great possibility is to join a prospecting club whose members actively dredge, and then go out to the claims and check out the members while they are dredging. If your local prospecting shop has a dredge set up, take a close look and even measurements or photos if you can. Check out their web sites as most have good photos of their dredges and the individual components that make up these dredges – you can get a lot of information from their web sites. These manufacturers have done quite a bit of research studying their products, they have tested different options and have developed efficient pieces of equipment that do the job well. Perhaps the best thing I can suggest is that you study the designs of the well-known dredge makers like Keene and Pro-line. Think about what you want and what you need then weigh those together with what you can afford. The time you spend sorting through design concepts, deciding what you will build and how you will build it will be well spent. Dredges need to be functional, durable and sturdy. You don't want your dredge to be rickety, or to fall apart, or to fail to function. Would love to clean it up more and get rid of the leeches.Of course you will be building on the cheap, but you don't want to shortchange yourself too much. Kids love the pond, it is right near the house. The pond is roughly a triangle shape, so I’ll start at the swimming area point and work my way out over a handful of years. Perhaps later I’ll look at some sort of de-watering. I plan to do most of the work in spring/fall when we have excess water and just pump over the bank towards the woods. It has about a foot or so of loose muck/silt that I think will suck up pretty nicely. It is very, very solid probing with a measure stick, and is pretty consistently 8 feet deep all way around the pond. We live in an area with a lot of flat rock, you can find it in all the nearby creeks, and in our ditch by the road. I’ve been aerating (two bottom diffused) the past 5 years since we bought the property and using bacteria, it has cleaned up a lot. I’m guessing it won’t negatively impact the pump? Any difference between 1.5” vs 2” at the nozzle? From the nozzle, I’ll probably have a 3 to 6 foot 3” pvc pipe to a T joint or something with a 1 to 2 foot pvc capped with about ¾ inch holes drilled for a sort of vacuum end.ĭoes this setup sound feasible? Am I correct in reducing 3” to 1.5 or 2” to the nozzle. And then however long 3” hose I need to pump out over the pond bank. I’ll have a short 3” discharge hose from the pump that I’ll have to reduce to 1.5” or 2” to the suction nozzle. I’ll probably only need a few feet of 3” intake hose. So, I’ll have a 3” trash pump that I’ll put on my floating dock so it can move with me as needed. Https:/ / mm5/ merchant.mvc?Screen=PROD&Product_Code=SN32 Https:/ / mm5/ merchant.mvc?Screen=PROD&Product_Code=SN3 Going to spend a little extra for a nozzle, I suspect I could make one cheaper, but I like these: Https:/ / 3-in-212cc-gasoline-engine-semi-trash-water-pump-296.html Craistlist and FB marketplace didn’t seem to offer much better options. This trash pump seems to have enough power and is affordable. I’ve been reading through the forum, trying to piece together the information I need, with a lot coming from Driver Cody’s posts. I think I have the pump and nozzle set, looking for guidance on hosing sizes. TLDR: Looking to build a Gold/Muck dredge using Venturi effect.
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