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1 Part Round Internal Overflow Siphon

1 Part Round Internal Overflow Siphon


The Easi Plumb 1 Part Internal Overflow Siphon is suitable for use in low level and closed coupled WC cisterns. Pressing down on the lever lifts a plastic washer which raises the level of the water above the spill over point. At this point the water in the cistern will flow down through the tube by siphonic action into the toilet bowl until the siphon action is broken. The siphon ideal for compact cisterns and is a single flush type. All siphons come complete with siphon backnut/washers and low level coupling nut/seal as standard.


  • Made of PVC
  • Can be Installed in Low Level & Closed Coupled WC Suites
  • Space Saving
  • Internal Overflow
  • Low Level Coupling & Washer Supplied
Technical Data:  
Valve Material: PVC
Washer Material: PVC
Valve Outlet: 1½” BSP
Flush Volume Adjustment: MonoFlush
Internal Overflow: 7½”
Flush Volume: 6 / 4 Litres