Converting a Raptor to a Dredge

[lbd]

as a rule of thumb for sluice size needed for the amount of water

• 16" for a 4" nozzle or powerjet
• 20" for a 5" or 6" mini, powerjet
• 26" for a 6" powerjet
• 28" for 8" dredge

*you can fudge a little, depends on the riffle or matting used.

In my experience... the 5" with a 20 inch sluice is a perfect match... the 4 inch is good, the 6 inch, is nearing the maximum water flow for the sluice width... and the 8 inch at 28 inches is way too narrow... even when set up as the new Keene triple... it needs to be much wider and / or have two side sluices.

 

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