#pump

Water-well maths as an API, computed locally and deterministically — the casing, yield and pump-setting numbers a well driller, pump installer or rural homeowner works to. The casing-volume endpoint gives the standing water in a well: gallons per foot = π/4 · diameter² × 12 ÷ 231 (about 1.47 gal/ft for a 6-inch casing, 0.65 for a 4-inch) times the water column, so 100 feet of water in a 6-inch casing holds about 147 gallons — the figure you need to purge a few well volumes before sampling or to dose shock-chlorination. The specific-capacity endpoint turns a drawdown test into how freely the well gives up water: specific capacity = pumping rate ÷ drawdown (gpm per foot), and the projected yield ≈ that times the available drawdown — 15 GPM at 20 feet of drawdown is 0.75 gpm/ft and roughly 45 GPM at 60 feet. The pump-setting endpoint gives the depth to hang the pump: static water level + drawdown + submergence (typically 10–20 feet), so it never air-locks as the level draws down, with a check against the well depth. Everything is computed locally and deterministically, so it is instant and private. Ideal for well-drilling and pump-installer apps, rural-water and homeowner tools, hydrogeology calculators, and trade aids. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Estimates — verify with a real drawdown test. For pump power/head use a pump API; for well chlorination use a pool-chemistry API.

api.oanor.com/wellpump-api

Pump power, head and affinity maths as an API, computed locally and deterministically. The power endpoint computes the power a pump needs from its flow rate, head, fluid density and efficiency: the hydraulic (water) power is ρ·g·Q·H, the shaft (brake) power is that divided by the pump efficiency, and an optional motor efficiency gives the electrical input power — all reported in watts, kilowatts and horsepower. Flow accepts litres per second or minute, cubic metres per hour or second and US gallons per minute; head accepts metres or feet; and the fluid can be water, seawater, oil, diesel and more, or a custom density. The head endpoint converts between pressure and head of fluid, H = P/(ρ·g), in both directions, across pascals, kPa, bar, psi and atmospheres. The affinity endpoint applies the pump affinity laws — flow scales with speed, head with speed squared and power with speed cubed — to predict the new operating point when you change the pump speed or trim the impeller diameter. Everything is computed locally and deterministically, so it is instant and private. Ideal for plumbing and HVAC tools, process and water-treatment engineering, irrigation and pool-pump apps, and energy-efficiency calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is pump power and head maths; for flow rate from pipe diameter and velocity use a pipe-flow API and for open-channel flow use a Manning API.

api.oanor.com/pump-api