i have a 3 inch xtreme trash pump 7 hp. walmart special.
it puts out around 18000 gph on 3 inch. Atleast what it says.
I was running sized down to 2 inch.
But i bought the piglet flare and now run it as 1.5 with a 2 inch intake needless to say bare idle is almost to much.
i dont know the psi guessing around 50 or 60 sized down like that.
but can blow water 4 ft above the box if crank it up.
I hate to do away with the pump it starts first pull and self primes most the time. but is heavy.
So was looking for info on pressure needed for suction dredge. i cant find no numbers says this much psi for this size dredge.
Ive heard of trash pumps being used on dredges and dont see no use buying a high dollar motor for a dredge if this one can put out the water needed.
If use a 3 inch intake might have enough for something.

any advice is appreciated.