---
title: "Flow Controls"
canonical: "https://help.innovyze.com/space/infodrainage2020v2/16417057/Flow%20Controls"
format: markdown
---
Flow controls are considered to be either online or offline in MicroDrainage models, while InfoDrainage allows these to be specified as outlets.

**Online/Outflow**- restricts the flow directly out of the location.

**Offline/Overflow** - acts as an overflow with flow either being lost or directed to another location.  If a Loop to Index has been specified, a No Delay connection is created to connect the flow from the outlet to the destination node.

## Single Flow Controls

The following flow controls are mapped directly:

- [Weir](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417342)
- [Orifice](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417352)
- [Flap Valve](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417354)
- [Gate](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417363)
- [V-Notch Weir](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417338)
- [Filtration](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417356)
- [Depth/Flow](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417344)
- [Pump](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417350)
- [Level Controlled Pump](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417348)
- [Siphon](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417340)
- [Hydro-Brake® Optimum](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417313)

### **Pipe**

This is imported as either a connection or an orifice.

> ⚠️ Notes:
> ⚠️ 
> ⚠️ - If a Loop to Index has been specified, then the pipe is imported as a connection and connected to the destination node.
> ⚠️ - Otherwise, an Orifice outlet is created with the diameter set to the pipe diameter.

### Third party MicroDrainage flow controls

Hydro-Brake® Classic, Crown Vortex Valve®, Garastor, ACO Q-Brake, and Hydrok Hydroslide are all third party flow controls, which are not supported and cannot be mapped directly. For each of these controls the Depth/Flow table has been created and imported.

## Complex Flow Controls

Occasionally, more than one flow control is required to restrict the flow for varying levels at a given location.  To support this, the concept of a complex flow control was introduced to allow multiple flow controls to be considered at the same location. 

These are imported as a [multiple](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2020v2/pages/16417346) outlet.