Description
The
160mm to 110mm 90 degree T branch is an unequal underground drainage junction designed to connect a 110mm branch into a larger 160mm main drainage run. This
160mm 110mm unequal T branch uses a near-right-angle configuration with a
double socket drainage T branch design, creating a practical
160mm reducing T junction where a
110mm branch into 160mm drain connection is required. Designed for compatible below-ground gravity drainage systems, the fitting allows a smaller drainage line to enter a larger main run while providing convenient push-fit socket connections.
160mm to 110mm 90 Degree T Branch
The
160mm to 110mm 90 degree T branch is suitable where a compatible 110mm drainage pipe needs to connect into a 160mm underground drainage system at approximately a right angle. The main drainage route remains 160mm while the side connection reduces to 110mm, making the fitting useful on larger foul-water and surface-water drainage layouts.
Choosing a 160mm to 110mm 90 Degree T Branch
Choose the
160mm to 110mm 90 degree T branch where the main drainage run is 160mm and the incoming branch is 110mm. Check the required branch angle and connection arrangement carefully, particularly where similar 45°, 87.5° or triple-socket junctions are available elsewhere in the drainage system.
160mm 110mm Unequal T Branch
The
160mm 110mm unequal T branch differs from an equal T branch because the side inlet is smaller than the two main-run connections. This allows 110mm drainage pipework to connect directly into a larger 160mm drainage run without building the junction from separate reducers and fittings.
160mm 110mm Unequal T Branch Applications
A
160mm 110mm unequal T branch is useful on suitable domestic, commercial and groundwork projects where smaller property drains or branch lines feed into a larger underground drainage system.
Double Socket Drainage T Branch
The
double socket drainage T branch configuration provides socketed connections for compatible underground drainage pipework. Push-fit ring-seal sockets allow prepared pipe or fitting spigots to be inserted directly into the junction, helping simplify installation within the drainage run.
Installing a Double Socket Drainage T Branch
Before installing the
double socket drainage T branch, make sure the sockets, seals and adjoining pipe ends are clean and free from grit or damage. Use suitable underground drainage lubricant where required and insert the pipe squarely so that the ring seal is not displaced during assembly.
160mm Reducing T Junction
This fitting acts as a
160mm reducing T junction, maintaining the larger 160mm main drainage route while introducing a smaller 110mm side connection. A
160mm reducing T junction can reduce the number of separate components required where the drainage design calls for these two pipe sizes to meet.
Using a 160mm Reducing T Junction
When installing the
160mm reducing T junction, consider the direction of flow, pipe falls and future maintenance access throughout the complete drainage layout. The junction and surrounding pipework should be correctly supported and bedded before backfilling.
110mm Branch into 160mm Drain
The fitting provides a purpose-designed way to connect a
110mm branch into 160mm drain pipework. A
110mm branch into 160mm drain connection may be required where smaller property, foul-water or surface-water drainage lines discharge into a larger main run.
Planning a 110mm Branch into 160mm Drain
When connecting a
110mm branch into 160mm drain system, position the branch to suit the intended flow direction and overall drainage layout. Suitable inspection or rodding access should be provided elsewhere in the system where required.
90 Degree Underground Drainage Junction
The near-right-angle branch configuration is useful where the incoming 110mm pipe approaches the 160mm main drainage run from approximately 90 degrees. Where a shallower entry angle is required, a 45° unequal Y branch may be more suitable.
90° T Branch vs 45° Y Branch
A 90° T branch creates a near-perpendicular connection into the main drainage run, while a 45° Y branch introduces the side pipe at a shallower angle. The correct fitting depends on the route of the pipework, available installation space, direction of flow and overall drainage design.
Unequal T Branch vs Equal T Branch
An unequal T branch joins different nominal pipe sizes. In this case the main drainage run is 160mm and the side branch connection is 110mm. If all three connections need to be 160mm, choose a 160mm equal branch instead.
PVC-U Underground Drainage
This type of fitting forms part of PVC-U piping systems used for non-pressure underground drainage and sewerage. PVC-U is widely used below ground because it provides a lightweight, corrosion-resistant system for compatible foul-water and surface-water drainage applications.
EN 1401 Underground Drainage
The exact fitting type is specified as an EN 1401 underground drainage product. BS EN 1401-1 covers PVC-U pipes, fittings and systems for non-pressure underground drainage and sewerage, including applications for wastewater and surface water. :contentReference[oaicite:1]{index=1} Further information on the standard is available from
BSI – BS EN 1401-1 Underground Drainage.
Preparing Drainage Pipe for Installation
If drainage pipe needs to be cut, make a clean square cut and remove burrs from the pipe end. Chamfer the prepared spigot where required and keep the pipe, socket and ring seal clean before assembly.
Bedding and Support
The branch and adjoining pipework should be evenly supported within the trench and installed to the appropriate drainage fall. Avoid leaving the junction unsupported between pipe sections, as excessive movement can place unnecessary stress on the socket joints.
160mm to 110mm 90 Degree T Branch Applications
The
160mm to 110mm 90 degree T branch is suitable for compatible underground drainage applications including foul-water systems, surface-water drainage, domestic groundworks, commercial drainage installations, property connections and drainage alterations.
160mm to 110mm 90 Degree T Branch Key Features
- Main drainage size: 160mm
- Branch connection: 110mm
- 90° T branch configuration
- Unequal reducing design
- Double socket connection
- Push-fit ring-seal jointing
- Suitable for compatible non-pressure underground drainage
- Suitable for foul-water and surface-water systems
- EN 1401 underground drainage specification
Shop 160mm Underground Drainage
Browse our complete
160mm Underground Drainage range for pipes, bends, branches, couplers, reducers and access fittings. You can also browse our wider
Underground Drainage range for additional pipe sizes, inspection chambers, gullies and drainage fittings. The
160mm to 110mm 90 degree T branch combines a practical
160mm 110mm unequal T branch layout with a
double socket drainage T branch design, creating a useful
160mm reducing T junction for connecting a
110mm branch into 160mm drain system.
