Description
The
160mm to 110mm triple socket T branch is an unequal underground drainage junction designed to connect a smaller 110mm branch into a larger 160mm main drainage run. This
160mm 110mm unequal T junction uses a nominal
90 degree triple socket branch configuration, creating a practical
160mm reducing T junction and versatile
triple socket underground drainage branch for compatible foul-water and surface-water systems. The triple-socket design provides socketed connections at all three openings, allowing compatible plain-ended underground drainage pipe to connect directly into both sides of the 160mm main run and the 110mm branch.
160mm to 110mm Triple Socket T Branch
The
160mm to 110mm triple socket T branch is used where a compatible 110mm drainage line needs to connect into a larger 160mm underground drainage system at a near-right-angle junction. The unequal design keeps the main drainage route at 160mm while reducing the side connection to 110mm.
Choosing a 160mm to 110mm Triple Socket T Branch
Choose the
160mm to 110mm triple socket T branch where the main underground drainage pipe is 160mm, the incoming branch is 110mm and socket connections are required at all three openings. If the surrounding pipework requires a plain spigot connection at one end instead, the double-socket version may be more suitable.
160mm 110mm Unequal T Junction
The
160mm 110mm unequal T junction joins two different nominal drainage sizes within a single fitting. The two main-run connections remain 160mm while the side inlet reduces to 110mm, making the fitting useful where smaller drainage runs discharge into a larger system.
160mm 110mm Unequal T Junction Applications
The
160mm 110mm unequal T junction can be used for compatible applications including:
- Connecting 110mm drainage into a 160mm main run
- Foul-water underground drainage
- Surface-water drainage
- Rainwater drainage layouts
- Domestic groundworks
- Commercial drainage systems
- Property drainage connections
- Drainage alterations and extensions
90 Degree Triple Socket Branch
The
90 degree triple socket branch creates a near-right-angle connection between the smaller branch and the 160mm main drainage run. This fitting is commonly sold as a 90° T branch in the trade. Comparable technical specifications describe this style of underground drainage junction as approximately 87.5°, which is the conventional near-90° geometry used in gravity drainage systems.
Installing a 90 Degree Triple Socket Branch
Before installing the
90 degree triple socket branch, check all three sockets and sealing rings are clean, correctly seated and free from damage. Use suitable underground drainage lubricant where required and insert prepared pipe ends squarely into each socket without displacing the seals.
160mm Reducing T Junction
This fitting acts as a
160mm reducing T junction, allowing the larger 160mm drainage route to continue while introducing a smaller 110mm side connection. A
160mm reducing T junction can reduce the number of separate reducers and connection fittings required where these two pipe sizes meet.
Using a 160mm Reducing T Junction
When positioning the
160mm reducing T junction, consider the direction of flow, drainage falls and future maintenance access throughout the complete system. The fitting and adjoining pipework should be properly aligned, bedded and supported before the trench is backfilled.
Triple Socket Underground Drainage Branch
The
triple socket underground drainage branch has socketed connections at all three openings. This allows compatible plain-ended pipe to connect directly into both sides of the main drainage run and into the smaller branch connection.
Triple Socket Underground Drainage Branch Connections
Each socket uses a push-fit ring-seal connection suitable for compatible underground drainage pipework. Keep the socket, seal and pipe surfaces clean throughout installation and use suitable drainage lubricant to help protect the seals during assembly.
Triple Socket vs Double Socket T Branch
The main difference between the triple-socket and double-socket versions is the connection arrangement.
- Triple socket: all three connections are socketed.
- Double socket: two socket connections with one plain spigot connection.
Select the version that best matches the surrounding drainage pipework and fittings.
Unequal T Branch vs Equal T Branch
An unequal branch connects different pipe diameters. On this fitting, the main run is 160mm and the side branch is 110mm. If all three connections need to accept 160mm pipe, choose a 160mm equal T branch instead.
90° T Branch vs 45° Y Branch
A near-90° T branch introduces the smaller drainage line at approximately a right angle to the main run. A 45° Y branch creates a shallower approach angle and may be preferable where the drainage layout benefits from a more gradual change in flow direction.
PVC-U Underground Drainage
This type of fitting is manufactured from PVC-U for compatible non-pressure underground drainage and sewerage systems. PVC-U provides a lightweight, corrosion-resistant solution widely used for foul-water, surface-water and general gravity drainage installations.
BS EN 1401 Underground Drainage
Equivalent 160mm x 110mm triple-socket unequal T junctions are tested to BS EN 1401-1 requirements for PVC-U non-pressure underground drainage and sewerage. For further standards information, see the
BSI BS EN 1401-1 reference.
Preparing Drainage Pipe for Installation
If pipe needs to be cut before installation, make a clean square cut and remove any burrs from the prepared end. Chamfer the pipe where required before insertion to help protect the ring seal and keep all jointing surfaces clean.
Bedding and Support
The junction and adjoining pipework should be evenly supported on suitable underground drainage bedding. Avoid leaving the fitting suspended between unsupported sections of pipe, as this can place unnecessary stress on the joints after backfilling.
160mm to 110mm Triple Socket T Branch Applications
The
160mm to 110mm triple socket T branch is suitable for compatible applications including:
- 160mm main underground drainage runs
- 110mm branch connections
- Foul-water drainage
- Surface-water drainage
- Rainwater drainage
- Domestic drainage systems
- Commercial groundwork
- Drainage repairs and alterations
- New underground drainage installations
160mm to 110mm Triple Socket T Branch Key Features
- Main pipe size: 160mm
- Branch pipe size: 110mm
- Nominal branch angle: 90° / approximately 87.5°
- Unequal reducing T configuration
- Three socket connections
- Push-fit ring-seal jointing
- PVC-U underground drainage fitting
- Suitable for compatible non-pressure gravity drainage
- Suitable for foul-water and surface-water applications
- BS EN 1401-1 system specification
Shop 160mm Underground Drainage
Browse our complete
160mm Underground Drainage range for pipes, bends, branches, reducers, couplers and access fittings. You can also browse our wider
Underground Drainage range for additional pipe sizes, inspection chambers and drainage accessories. The
160mm to 110mm triple socket T branch combines a practical
160mm 110mm unequal T junction with a
90 degree triple socket branch arrangement, creating a useful
160mm reducing T junction and versatile
triple socket underground drainage branch.
