Now your pump is instantly pushing that water through a smaller hole and having to push the entire length through a smaller hose, which equals more friction loss as there is more surface area for the amount of water in the hose to "grab" on to, again, robbing your water of precious velocity through the hose. So, you've taken a 2" and restricted it down to 1.5". This robs the water of velocity, kind of like your damper in your dredges? it slows water down right? well, that same force is exerted all along that hose.
Now, taking into account fluid dynamics, you get a thing called friction loss along the length of the hose. Thats not counting hose, bends, or restrictions. 1/2" now? So you took a trash pump that only has a max PSI of say 55(im being generous, i think mines 45). It also doesnt help i was probably banging that sucker around XD Probably already due to outward pressure already forced on the pipe from the inside, it split down the very center of one of my 45 elbows. Why? I already broke my first one(the one in the video ironically). Now, as EVERYONE has probably already said, invest in a metal one. I'll b getting out this weekend i'll get a video of it. Unfortunately only the first 7 seconds show the nozzle, and even then sort of underwater, i apologize. I have a video I'll post so you can see what I mean.Īlrighty. From there, going back to the inlet pressure line, use PVC reduction fittings, or 45* connectors and heat them up, press and glue together so that it curves backwards. What I did for mine, was where he has his T for his nozzle, that should be the only place its necked down. A 12v pond pump 3700-4000, doesnt matter, doesnt have the PSI to keep up with restriction like that. The only problem I see is that he has it restricted so far back.
IF YOU CAN, keep your pipe as big as possible before necking down to your jet.ĭigger - The video you posted he has the right idea. That means unrestricted flow to the nozzle UNTIL you neck down for the jet. In a 12v or even a trashpump setup you need all the unrestricted volume/PSI you can get. You guys think putting a smaller hose on the outlet raises the psi? You also are not taking into account friction loss. If you have a 2" outlet, run 2" all the way to the nozzle, have 1.5" outlet? run 1.5" outlet to the nozzle. DO NOT RESTRICT YOUR PUMP TO YOUR NOZZLE.
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