Freshwater System Calculator

Calculate freshwater tank sizing, pump capacity, and hot water heater requirements for vessels

Input Parameters

Results

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Min Tank Size
gallons
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Pump Capacity
gpm
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Pump Pressure
psi
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Hot Water BTU
BTU/hr

Reference

Water usage: 5 gal (conserve) to 20 gal (liberal) per person per day Pump: 2-4 GPM, 35-45 PSI typical Hot water BTU = gallons × 8.33 × ΔT × 1.0