Sizing Guide and Calculator for Commercial Water Softener (FRP) The following calculator can be used to size commercial, top mount valve water softener sizing. If you have a unique application such as hot water, special construction materials, high efficiency or industry specific, please call us or see some of the specialized water softener calculators below: Hospital water softener sizing calculator Hotel water softener sizing calculator Industrial water softener low flow channeling guide calculator Commercial Water Softener Sizing Guide & Calculator (Fiberglass – FRP) Average Gallons Per Day (GPD) Flow Rate: Peak Continuous Flow Rate GPM*: Desired Hours Between Regenerations: Hardness of Water (Grains Per Gallon): Capacity per Cubic foot of Resin (Grains): Total Gallons of Water Used Between Regenerations: Cubic Feet of Water Softener Resin Needed Per Tank: Inch Valves (estimate): Many variables exist when sizing commercial water softeners beyond the scope of the fiberglass (FRP) top-mount valve water softener calculator below. Water pressure, temperature, flow rate and cubic feet of resin per tank are all variables that also have effects on water softener sizing and are not considered. These guides are to be used for quick estimates. For detailed commercial water softener sizing including configurations (e.g. single, twin parallel, twin alternating, triples, quad softeners), control types (time-clock, metered, PLC, progressive flow, additive flow) or pretreatment for reverse osmosis, deionization or other ultra high purity water treatment equipment, it is important that you email or call Nancrede Engineering at 888-56-WATER (569-2837). Our sales engineers are experts in water and are the same people you get for service or when you call our free, unlimited technical support. Contact us right now, and we’ll find the perfect system for your application. Ask about salt saver systems to save energy and salt. Nancrede Engineering also offers preventative maintenance, engineering consultation, equipment leasing, financing, and build, own, operate options. Let us know if you would like information on how these services can help you reduce downtime and capital risks.