March 815-SS-C pumps

The pumps I chose for the Bluto 555 are the 815-SS-C hydronic pumps by March.  March is popular among homebrewers, and I was happy to find a model that seems to work very well on this system.  The 815-SS-C's pump housing is stainless steel, and the pump is supposed to be able to achieve a flow rate of 8 gallons per minute.  The rate you actually get will depend on a variety of factors, including headspace, the tubing used and the use of various tees and elbows.

In my tests so far moving water from one kettle to another, I've consistently observed a rate of just over 6 gpm.  Assuming a mash with 100 lbs of grain and a liquor/grist ratio of 1.25 quarts/lb. (31.25 gal), the pump should facilitate a 5 minute dough in, which is plenty fast.  For RIMS wort return and sparge rate, I'll rely on the return port butterfly valve's incremental positions to restrict the flow to a slower rate.

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dimensional drawing
performance curve