Calculators
Every number in these tools comes from a manufacturer manual, a code table or a public agency, cited on the tool's page.
- Septic pumping & tank size
How often to pump by tank size and household, and the minimum tank size by bedrooms from five published tables. - Water softener size
Grains per regeneration from hardness, iron, manganese and household use, with salt per year. - Pressure tank size
Drawdown needed for your pump and switch setting, and which published tank models meet it. - Well pump size & total dynamic head
Flow your house needs and the head the pump must deliver it at, with jet vs submersible limits. - Well pump wire size
Smallest copper wire for your motor and cable run, from Franklin Electric’s cable-length table. - Well water test results
Enter a lab report: each number against EPA limits, public-health steps first, then treatment order.