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Three professional-grade calculators built on the standards that Maryland plumbing inspectors use. Size your water heater, pipe runs, and sump pump accurately before calling a contractor.
Disclaimer: These calculators provide simplified estimates for preliminary planning purposes. Water heater sizing uses the PHCC First Hour Rating (FHR) method. Pipe sizing uses the IPC 2021 Water Supply Fixture Unit (WSFU) method per Table 604.3 and Table 604.1. Sump pump sizing uses NOAA Atlas 14 100-year storm event data for Maryland. Final sizing for permitted work must be performed or approved by a Maryland-licensed master plumber. Diaz Sheet Metal provides complimentary on-site assessments with every plumbing quote.