Dudley Turbo S1-11 9" Syphon — Brass Rubberline (317449)
The Dudley Turbo S1-11 (317449) is the premium heavy-duty solution for high or low-level wellbottom and narrow cisterns, specifically designed to fit the Dauntless range. This version features a robust brass fitting for superior longevity. Like other Turbo models, it utilizes a 2-part design, allowing the body to be removed for maintenance in under 5 minutes without disconnecting the water supply or dismantling the cistern.
Identification Guide:
MPN: 317449 | Model: S1-11 | Height: 9 Inch | Outlet: 38mm (1.5") | Fitting: Brass (Rubberline)
Key Features
- Wellbottom Specialist: Engineered specifically for the unique dimensions of narrow and wellbottom cisterns.
- Brass Connection: Durable brass threaded tail (Rubberline version) for high-strength installation.
- Rapid Servicing: Leave the white downleg in place and simply swap the blue body during repairs.
- Aspirator Compatible: Works with the Syvac aspirator (SKU FTB473) if required. Buy here.
Maintenance & Spares
Be Prepared: Syphon diaphragms perish over time. We strongly recommend purchasing a spare washer to ensure optimum flushing. Find the replacement diaphragm (SKU FTB849) here.
Looking for the Plastic (Rubberwell) version - Find it here.
Technical Resources
- Official Dudley Data Sheet (Full Dimensions)
Questions & Answers
Q: Does this syphon have an internal overflow?
A: Yes. It can act as an internal overflow device provided the spillover point is lower than any external holes (like the lever hole) in the cistern.
Q: How do I fit this to a close-coupled toilet?
A: Ensure the threaded tail is trimmed back to 2-3mm from the back nut to prevent the flush from being throttled.
Q: How does a dual flush syphon work?
A: Release the lever for a full flush. Hold the lever down to break the syphonic action early, providing a reduced water-saving flush.
Q: What are the white plugs on the side for?
A: These adjust the flush volume. Removing a plug will stop the flush at that level, reducing the total volume of water used.