#plumbing

Plumbing-code sizing maths as an API, computed locally and deterministically — the fixture-unit and pipe-sizing numbers a plumber, designer or inspector runs from the code book. The dfu endpoint totals drainage fixture units for a set of fixtures (IPC Table 709.1): pass a list like toilet:2,lavatory:3,shower:1,kitchen_sink:1 and it weights each by its discharge — a toilet is 3, a lavatory 1, a tub or shower 2 — for a total of 13, with a grouped full bathroom counting as 6 rather than the sum of its parts. The pipe-size endpoint gives the minimum building-drain size for a DFU load at a slope (IPC Table 710.1(1)): the smallest pipe whose capacity meets the load, so 50 DFU at a quarter-inch-per-foot fall needs a 4-inch drain, with the reminder that any drain carrying a water closet is a 3-inch minimum. The supply-gpm endpoint reads probable peak water demand off the Hunter curve: diversity means 100 supply fixture units draws only about 54 GPM, not the sum of every fixture running at once — the number you size the water service against. Everything is computed locally and deterministically, so it is instant and private. Ideal for plumbing-design and estimating apps, code-check and permit tools, MEP-engineering calculators, and trade-school aids. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Based on the IPC — verify against the code adopted in your jurisdiction.

api.oanor.com/plumbing-api

Septic-system sizing as an API, computed locally and deterministically with the typical US onsite-wastewater rules of thumb. The flow endpoint estimates the design wastewater flow for a home from its number of bedrooms (assuming two people per bedroom) or an explicit occupancy, at a default 60 gallons per person per day, returning the daily flow in US gallons and litres. The tank endpoint recommends a septic tank size as the larger of a retention-based size (flow × retention days, default two days) and the typical bedroom-based code minimum (≤3 bedrooms 1,000, 4 bedrooms 1,200, 5 bedrooms 1,500, 6 bedrooms 2,000 US gallons), and tells you which one governs. The drainfield endpoint sizes the soil absorption (leach) field: it divides the daily flow by a soil loading rate — given directly or looked up from a percolation rate in minutes per inch — to get the absorption area, then divides by the trench width to get the trench length, in both imperial and metric. Everything is computed locally and deterministically, so it is instant and private. An estimating aid, not a code-stamped design — always confirm with your local health authority. Ideal for plumbing and septic-installer tools, rural real-estate and land apps, home-building and permitting calculators, and inspection software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is septic / onsite-wastewater sizing; for storage-tank volume and fill level use a tank API.

api.oanor.com/septic-api

Matemáticas de dureza del agua como API, calculadas local y determinísticamente. El endpoint convert convierte un valor de dureza entre todas las unidades comunes — partes por millón / miligramos por litro como carbonato de calcio, granos por galón estadounidense, grados alemanes (°dH), grados franceses (°f), grados ingleses o Clark, y milimoles por litro — pasando todo a través de ppm (1 gpg = 17.118 ppm, 1 °dH = 17.848, 1 °f = 10, 1 °Clark = 14.254), y clasifica el resultado. El endpoint classify etiqueta un valor como blanda, moderadamente dura, dura o muy dura en la escala USGS/OMS. El endpoint softener dimensiona un ablandador de agua: a partir de la dureza y el uso de agua del hogar calcula los granos de dureza eliminados por día y la capacidad de granos necesaria entre regeneraciones. Todo se calcula local y determinísticamente, por lo que es instantáneo y privado. Ideal para herramientas de tratamiento de agua y plomería, aplicaciones de acuarios y piscinas, dimensionamiento de electrodomésticos y ablandadores, y software para hogar y laboratorio. Cálculo local puro — sin clave, sin servicio de terceros, instantáneo. En vivo, nada almacenado. 3 endpoints. Esto es conversión de dureza del agua; para conversión general de unidades use una API de conversión de unidades y para dosificación de piscinas use una API de piscinas.

api.oanor.com/hardness-api