Disclaimer and educational-use notice

Educational helper tools. Results depend entirely on your inputs. They do not replace the code edition adopted by your authority having jurisdiction, manufacturer data, or review by a qualified design professional.

• Every result depends on what you enter. Check inputs, units and assumptions.
• Code requirements, intervals and section numbers change between editions. Always verify against the edition adopted by your authority having jurisdiction (AHJ) and any local amendments.
• Use manufacturer data (pump curves, device currents, listed losses) over typical values.
• Tools do not certify, approve or seal anything. Where a licensed or certified professional is required, that person remains responsible for the design or inspection.
• Our products contain no text copied from NFPA or other standards. References are to chapter or section numbers only, so you can look up the requirement in your own copy of the standard.