Converting A51 to high banker?

[wingmaster]

When converting the Keene A51 sluice to a high banker will I need to change to dredge riffles? or does it depend on how much water I'm running to it. I seen a cheap 1" gas pump but only runs 2220 gph but I'm thinking this won't do such a good job washing the rock quick enough, am I right? What flow of pump would be right for the A51 setup high banker and will it require the dredge riffles made for the A51? Thanks for the replies and info

 

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[Hoser John]

Modified hungarian riffles required and expanded metal dumped as knife edged m/h don't have the 1/2 lip to seal at the bottom. Bigger pump would be better. Trying to do any dredging or just shoveling hb style as the low sided 51 is 2" max dredge or side overflow becomes a big issue-Lotza luck-John