Dredge pump/suction nozzle question

[bfavre40]

I am building a dredge and planning on using a 3 inch suction nozzle. Just have a couple of questions. I plan on using the 3 inch duromax water pump with 91 feet of head lift. Is this enough to operate a suction nozzle of 3inches? Also, should I go with the 3x2 inch suction nozzle or the 3x1.5 or does it matter? I just need to make sure the pressure is great enough to create the suction. Any help is appreciated!

 

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[strickman]

I run a 3x2 on mine ,I have a 3" clear water pump . I used a 3"x2" bell reducer on the top of the pump (high pressure side ) .read this thread http://www.treasurenet.com/forums/dredging-hi-banking/236464-will-pump-motor-work.html

 

[Guest412]

Instead of having to get two long hoses for the suction nozzle , unless you already have it, consider a venturi jet, may be cheaper than buying the extra 15-20ft of 2" hose. As strickman said he runs a 2 inch off the outlet of the pump that will be ok. If you use a venturi jet see what size the pressure hose fitting is they may only be 1.5" not sure what sizes they come in. the 1.5 may give you a little more pressure. Plus its alot easier to move a single hose than it is to run two hoses together. either will work though .