I have a question about a well gpm and if I am understanding flow rates correctly for a Fleck 9100 water softener. I have a private well with a pressure tank and water softener that is plumbed with 1.25" copper. The pressure tank is set for 40/60 psi. Based on a site on the internet it stated "the formula for determining well flow rate: (Gallons drawn) divided by the (number of seconds timed for the pump cycle), then multiplied by 60 equals the gallons per minute (GPM) that your pump produces." Based on this I have 20.4 gpm (19 gallons /56 seconds)*60
I am looking to purchase a twin tank softener and found the Fleck 9100. Looking at the spec sheet for a Fleck 9100 http://www.pentairwatertreatment.com...et%2040821.pdf
it states for a flow rate (50 psi inlet) on a 1" meter, the continuous flow rate (15 psi drop) is 21gpm. Does that mean that the treated water coming out of the softener is 35psi? Also what does it mean by peak flow rate (25 psi drop) 1" meter 28gpm? My other question is if I got the 4 cu ft of resin in each tank would I get any hard water leakage if I were using the full 20.4gpm continuously? What is confusing me is a site I visited is selling a Fleck 9100 with 4 cu ft resin in each tank but rated the flow rate 16 gpm at a 15 psi drop. Why would it not be the 21 gpm as per the spec sheet?
I appreciate the reply.