The outlet must match the waste pipe already in the floor, and its type — horizontal, vertical or side — determines whether the pipe can be routed at all. Check the pipe size and direction on site before ordering.
Outlet types
| Type | Pipe routing | Where it is used |
|---|---|---|
| Vertical | Straight down through the slab | Ground floors, new build with available depth |
| Horizontal | Runs sideways beneath the floor | Upper floors, timber joists, limited depth |
| Side | Runs sideways at channel level | Very thin floors where the pipe must stay within the build-up |
Matching the pipe
Outlet diameter must correspond to the waste pipe diameter. Standards differ by market, so confirm the actual pipe size rather than assuming. Where an existing drain is being replaced, measure the existing pipe and check whether an adaptor is available.
What affects outlet choice
- Structure — concrete slab, timber joists, or a raised floor
- Available depth — a horizontal outlet needs room for the pipe and its fall
- Joist direction — determines whether the pipe can run between joists
- Existing services — pipework and cabling may block the route
- Distance to the stack — longer runs need more fall
Connection points to check
- Pipe diameter and material at the connection point
- Whether the pipe is already at the correct height
- Fall along the horizontal run
- Whether an adaptor is needed
- Access for assembly once the drain is positioned
Related: minimum installation depth · wooden subfloors
Send us the pipe size and direction and we will confirm the matching outlet. Request a Quote