Sizing Guide for Ultrapure Water Softener (FRP Tanks) The calculations generated below can be used as a guide for ultrapure water softener sizing. If you have a special application, please call us or see the specialized industrial steel water softener calculators here: Hospital water softener sizing calculator Hotel water softener sizing calculator Industrial water softener low flow channeling guide calculator Fiberglass (FRP) Ultrapure Water Softener Sizing Guide & Calculator 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 ultrapure & high purity 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 have effects on water softener sizing and are not considered. These calculators are to be used for quick estimates only. For detailed ultrapure 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 that will get you ultrapure water you need. 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.