Sanitary & Plumbing Calculator – Water Demand & Pipe Estimate
Use the sanitary & plumbing calculator to perform a quick preliminary calculation from project dimensions and engineering assumptions. Review inputs and verify final results against project requirements.
Introduction
Estimate preliminary domestic water demand, storage capacity, pipe lengths and sanitary fixtures from occupancy and project assumptions.
Water Demand Estimation
Preliminary water demand is often estimated from population or occupancy multiplied by an applicable per-capita demand. Local codes and building type determine the appropriate design value.
Storage Tanks
Tank sizing depends on demand, supply reliability, operating hours and fire or other dedicated storage requirements. Potable and non-potable systems may need separate treatment.
Pipe Sizing
Pipe diameter should be selected from design flow, allowable velocity, pressure loss, material roughness and fixture demand. Length alone is not enough to determine pipe size.
Fixture Planning
Sanitary fixtures should be coordinated with occupancy, building use and applicable plumbing rules. Venting, drainage slopes, traps and access are separate design considerations.
FAQs
Q: Does the calculator design a complete plumbing system? A: No.
Q: Can water demand be based only on floor area? A: Occupancy and building use are usually more meaningful inputs.
Disclaimer
Final plumbing design must follow applicable water-supply, drainage, sanitation and fire requirements and be reviewed by a qualified professional.