Power jet: finding the right inlet/outlet ratio

[Ckdzubay]

I have been piecing together a backpack dredge and am down to one last thing... the power jet. The pump I have is very small, only 1". I know that water pressure is the key to making the magic of a dredge work. Seeing as how the pump is so small, I am trying to figure out what the best size would be for the main tube with a 1" inlet. I am going to end up welding this myself, so any advice on angle or design would be immensely helpful!

Once I get this figured out, I'll be sure to post some pics of the gold I get with this dredge.

Thanks for taking the time to read my post!

-Dz

 

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[Sick4gold]

Need more info on the pump. 1 inch tells me basically nothing.
What's the pump rated at? What's the pressure? Inlet/outlet, etc.
Trash pump or ?

Mabe Hoser will chime in as he's amazing at this kinda thing

 

[Jason in Enid]

Depends on how many GPMs and PSI your pump can generate. Not all pumps are the same. My 2" keen pump does great on my 4 inch dredge, but a cheap 2 inch trash pump wouldn't work anywhere close to the same.