Fixture unit, drain slope, vent sizing, and drainage calculators.
Calculate total fixture units (WSFU/DFU) for bathrooms, kitchens, and commercial spaces.
Calculate the correct drain slope and total drop for horizontal drain pipes per plumbing code.
Size vent pipes based on fixture units and developed length per plumbing code tables.
Determine the correct P-trap or S-trap size for any plumbing fixture per code.
Size horizontal and vertical drain pipes from total drainage fixture units per code.
Calculate the number of roof drains needed based on roof area, rainfall intensity, and drain capacity.
Calculate sewage ejector pump horsepower from flow rate, total dynamic head, and efficiency.
Size a grease trap or grease interceptor based on flow rate, retention time, and fixture count.
Calculate required septic tank size based on number of bedrooms and daily water usage.