The Ductile Iron Double Socket Tee (also called an all-socket tee or triple socket tee) is a three-port fitting where all three ends are machined as sockets with pre-installed EPDM rubber gaskets. This differs from a standard socket tee which typically has two sockets and one plain spigot end. The double socket design is used when you need to connect plain end pipe into all three ports — for example, when installing a tee in the middle of an existing pipeline where both sides of the run are plain pipe. Installation is extremely simple: lubricate the plain ends of the three incoming pipes, push them into the sockets until they bottom out, and the joint is complete. Each socket joint can accommodate up to 5° of angular deflection, making this fitting ideal for field conditions where alignment is not perfect. The fitting is cement mortar lined (for potable water) and externally coated with zinc + bitumen for buried service.
Why Choose Us / Advantage
Easiest Buried Tee Installation: Push all three pipes in — no pipe cutting to precise lengths required.
No Special Tools: Just lubricant and a bar for leverage — no fusion machines, no wrenches.
Gaskets Pre-Installed: No risk of losing or damaging gaskets during installation.
Ideal for Repair Work: Cut out a damaged pipe section and drop in a double socket tee.
Full Pressure Rating: Rated PN16 even with deflection.
Technical Data
★ Material Ductile Iron ISO 2531 K9
★ Joint Type Socket x Socket x Socket (all Tyton)
★ Gasket EPDM (pre-installed in each socket)
★ Internal Lining Cement mortar / Epoxy
★ External Coating Zinc + bitumen / PE sleeving
★ Pressure PN10 / PN16 / PN25
★ Size Range DN80 – DN800
★ Deflection per Socket 3° – 5°
★ Use Buried pipelines only
Applications
● Inserting a tee into existing buried water main (both sides of run are plain pipe)
● Sewer lateral connections (main to branch with all push-on joints)
● Irrigation line branch installations
● Fire loop tee connections where flanges are not desired
● Rural water network extensions
