Drainage Design
Lay out a site drainage plan from the Water tab — from drain inlets and catch basins through drain pipes to an outlet.
Designing a Site Drainage SystemA drainage plan places collectors, routes, access points and outlets. The app shows the intended arrangement and can report modeled fall for supported runs. It does not approve discharge arrangements, size the complete network or simulate rainfall.
Place collection objects
Open Water → Surface Collection. Place Drain Inlet or Downspout Connection, or draw a Channel Drain. Set the offered collector type, fixture, width or connection diameter from the intended design.
Add collection and access points
Under Access & Maintenance, place Catch Basin and Cleanout Riser as required by the intended plan. Record chamber/sump depths or access details in their Inspectors. Symbols do not create automatic pipe routing.
Draw conveyance
Choose Drain Pipe under Conveyance & Discharge. Draw the route with at least two points, then finish. Use Path properties for diameter, burial and optional start/end depths. Read the computed Slope and any Reverse fall warning.
Document the outlet
Place Outlet Point, select Soakaway, Boundary Outfall or Storm Sewer, and choose the fixture style. These choices document intent; they do not evaluate infiltration or permission to discharge.
Review the model
Inspect terrain levels, route direction, displayed quantities and physical alignment. A deeper ending burial depth does not guarantee downhill fall when terrain rises or falls along the path. Use the modeled result and source data rather than a generic installation assumption.