BBS Automatic Syphon 140mm (5.1/2") — 4.5 Litre (1 Gallon) 3/4" BSPT
The BBS Automatic Syphon is an auto-flushing siphon unit designed for commercial urinal cistern installations requiring a 140mm (5.1/2") height drop. Operating on a auto-siphonic dosing principle, it delivers a consistent 4.5-litre (1-gallon) flush capacity to maintain sanitary conditions without manual operation. Featuring a standard 3/4" BSPT threaded outlet, this unit was built for reliable performance in auto-flush cistern setups. Please note: This product was officially discontinued by the manufacturer in July 2026.
Identification Guide:
Brand: BBS | Syphon Height: 140mm (5.1/2") | Flush Volume: 4.5 Litres (1 Gallon) | Outlet Thread: 3/4" BSPT
Key Features
- Automatic Operation: Triggers flush cycle automatically once water reaches the internal siphon threshold.
- Precise Capacity: Calibrated for 4.5-litre (1-gallon) dosing in auto-flush urinal systems.
- Standard Connection: Built with a 3/4" BSPT male thread for standard commercial tailpipe connections.
- Compact Profile: 140mm (5.1/2") cap height suits low-level or space-constrained cistern housings.
Discontinued Status Notice
As of July 2026, this BBS Automatic Syphon unit has been formally discontinued by the manufacturer. Stock is no longer produced, and no direct superseded model or universal drop-in replacement is provided under this exact specification.