Description
The
160mm to 110mm triple socket Y 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 Y branch uses a
45 degree triple socket branch configuration, providing a practical
160mm reducing Y junction where a
110mm branch into 160mm drain connection is required. The triple-socket design provides socket connections at all three openings, making it particularly convenient when connecting plain-ended drainage pipe into the main run and branch.
160mm to 110mm Triple Socket Y Branch
The
160mm to 110mm triple socket Y branch is used where compatible 110mm underground drainage needs to join a larger 160mm drainage system at a 45° angle. The gradual Y configuration introduces the smaller branch into the main run at a shallower angle than a near-90° T branch.
Choosing a 160mm to 110mm Triple Socket Y Branch
Choose the
160mm to 110mm triple socket Y branch where the main drainage run is 160mm, the incoming branch is 110mm and socketed connections are required at all three openings. If one of the main-run connections needs to be a plain spigot rather than a socket, check whether the double-socket version is more suitable for the installation.
160mm 110mm Unequal Y Branch
The
160mm 110mm unequal Y branch has a smaller branch diameter than the main drainage run. The two main connections remain at 160mm while the side branch accepts compatible 110mm pipe, making the
160mm 110mm unequal Y branch useful on larger drainage installations where smaller drains feed into a main sewer or drainage line.
160mm 110mm Unequal Y Branch Applications
A
160mm 110mm unequal Y branch can be used for suitable applications including:
- Connecting 110mm underground drainage into a 160mm main run
- Domestic foul-water drainage
- Commercial underground drainage
- Surface-water drainage systems
- Property drainage connections
- Drainage extensions and alterations
- Groundwork installations
45 Degree Triple Socket Branch
The
45 degree triple socket branch introduces the 110mm connection into the 160mm main pipe at a gradual 45° angle. A
45 degree triple socket branch can provide a smoother directional transition than a near-right-angle branch where the drainage layout allows.
Installing a 45 Degree Triple Socket Branch
Before installing the
45 degree triple socket branch, check all three sockets and seals are clean, correctly seated and free from grit or damage. Use suitable underground drainage lubricant where required and push prepared pipe ends squarely into the sockets without displacing the ring seals.
160mm Reducing Y Junction
This fitting acts as a
160mm reducing Y junction, allowing the main 160mm drainage route to continue while introducing a smaller 110mm connection. A
160mm reducing Y junction is particularly useful where several smaller drainage runs need to discharge into a larger underground drainage system.
Using a 160mm Reducing Y Junction
When positioning the
160mm reducing Y junction, consider flow direction, pipe fall, available installation space and future maintenance access. The fitting and adjoining pipework should be correctly supported and bedded before the trench is backfilled.
110mm Branch into 160mm Drain
This fitting provides a purpose-designed way to connect a
110mm branch into 160mm drain pipework without using separate reducers and junction components. A
110mm branch into 160mm drain connection is commonly required where smaller property drainage lines enter a larger foul-water or surface-water system.
Planning a 110mm Branch into 160mm Drain
When adding a
110mm branch into 160mm drain system, make sure the branch is orientated with the intended flow direction and that appropriate inspection or rodding access is available elsewhere in the drainage layout.
Triple Socket Underground Drainage Connection
Unlike a double-socket junction, this fitting has socketed connections at all three openings. This allows plain-ended pipe to be inserted directly into both sides of the 160mm main run and into the 110mm branch, making the fitting convenient for new drainage installations and replacement sections.
Triple Socket vs Double Socket Y Branch
The triple-socket and double-socket versions perform the same basic reducing Y-junction function, but their connection arrangements differ.
- Triple socket: all three openings are socketed
- Double socket: two socket connections with one plain spigot connection
Choose the version that best matches the surrounding pipe and fitting arrangement.
PVC-U Underground Drainage Fitting
This type of unequal Y branch is manufactured from PVC-U for compatible non-pressure underground drainage systems. PVC-U provides a lightweight, durable and corrosion-resistant solution widely used for foul-water and surface-water gravity drainage.
BS EN 1401 Underground Drainage
The product configuration is available within underground drainage systems manufactured and tested to the requirements of BS EN 1401-1 for PVC-U non-pressure underground drainage and sewerage. The exact 160mm x 110mm 45° triple-socket configuration is also sold specifically for surface-water and sewage drainage applications. :contentReference[oaicite:0]{index=0}
Push-Fit Ring Seal Connections
Triple-socket underground drainage branches use push-fit socket connections with sealing rings to create secure joints with compatible pipe. Keep the seals and pipe ends clean during assembly and use suitable drainage lubricant to reduce the risk of damaging or displacing a seal.
Foul-Water and Surface-Water Applications
The
160mm to 110mm triple socket Y branch is suitable for compatible gravity drainage layouts including:
- Foul-water drainage systems
- Surface-water drainage
- Rainwater drainage
- Domestic underground drainage
- Commercial drainage systems
- Property connections
- Groundwork and civil drainage projects
45° Y Branch vs 87.5° T Branch
A 45° Y branch introduces the connecting pipe at a shallower angle than an 87.5° T branch. The correct fitting depends on the drainage route, direction of flow, available space and installation design.
Preparing Drainage Pipe for Installation
If pipe needs to be cut before fitting, make a clean square cut and remove burrs from the pipe end. Chamfer the prepared edge where required and keep the pipe, socket and seal free from soil and grit before assembly.
160mm to 110mm Triple Socket Y Branch Key Features
- Main drainage size: 160mm
- Branch connection: 110mm
- 45° unequal Y branch
- Three socket connections
- Suitable for connecting plain-ended pipe
- PVC-U construction
- Push-fit ring-seal connections
- Suitable for compatible foul-water drainage
- Suitable for compatible surface-water drainage
- Suitable for non-pressure gravity drainage systems
- BS EN 1401 system 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 the wider
Underground Drainage range for additional pipe sizes, chambers, gullies and drainage accessories. The
160mm to 110mm triple socket Y branch combines a
160mm 110mm unequal Y branch layout with a
45 degree triple socket branch configuration, creating a practical
160mm reducing Y junction for connecting a
110mm branch into 160mm drain pipework.
