Pump Soze - Gold Prospectors Association of America - Forum

Last Post 10 Aug 2014 08:50 PM by William White

Pump Soze

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Lester Kemble

Greenhorn
Posts:5

03 Aug 2014 08:51 AM
I have a recirculating mini highbanker which uses a 750 gpm pump with a 3/4 inch hose. I would like to change this to an 1100 gpm pump. What will happen if I don't change the hose size? The 1100 gpm pump is designed to use 1 inch hose.

Ronald Peterson

New Member
Posts:97

03 Aug 2014 10:58 AM
Lester, I believe you mean a 750 G.P. Hour pump, which is a 12 1/2 G.P.M. pump. My guess is you want to increase water flow and the 1100 G.P.H. will bring you up to 18 1/3 G.P.M.. You should be fine using a 1 inch by 3/4 inch bell reducer coming off the pump. My set up had a 1 inch, 100 G.P.M. pump on it and I changed it to a 2 inch, 150 G.P.M. pump using a 2 inch by 1 inch bell reducer with no problems. Keep in mind that I am running a gas powered motor that can be throttled for water flow. If your using a 12 volt pump that runs at a fixed rate I have no experience with what might happen. Ron

WALTER EASON
Buzzard

Buzzard
Posts:581

05 Aug 2014 08:46 AM
Most bilge pumps you can throttle without damage. This is not shut off only throttle with the use of a shut off valve. You see this use on most 12 volt prospecting equipment.

William White

Greenhorn
Posts:7

10 Aug 2014 08:50 PM
Going to a larger pump using the smaller hose size will limit your outflow and may increase your pressure. If you are looking for more water you should increase the hose size. Too much pressure may blow your cons off the sluice.

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