FixTheBog™ NIS 259 Dual Flush Cable Valve Complete With Push Button
The FixTheBog™ NIS 259 Cable Valve (OEM Series NP259) is an authentic replacement dual flush valve designed specifically for cisterns fitted with NIS (Nison) sanitaryware mechanisms. Commonly installed across UK residential bathrooms, commercial suites, and selected Bathstore models, this complete kit replaces faulty, sticking, or leaking cable mechanisms to restore a crisp, reliable full or water-saving reduced flush.
Identification Guide:
Model / MPN: NIS 259 (OEM NP259) | Trade Reference: TS1606 | Brand / Fitting: NIS Sanitaryware | Outlet Diameter: Standard 2" BSP (approx. 59–60mm outer thread) | Operation: Mechanical Cable Dual Flush | Included Components: Valve body, base cradle, cable linkage, and dual flush push button.
Key Features
- Original Fit: Matches internal NIS specifications, resolving flush failure and button jamming.
- Complete Replacement: Supplied with matching dual flush push button to ensure correct cable travel and full seal opening.
- Quick Servicing: Uses a bayonet twist-lock body; easily twists out of an existing NIS cradle for maintenance without removing the cistern.
- Adjustable Height & Overflow: Telescopic overflow pipe allows tailored adjustment to match your cistern's waterline.
Installation & Compatibility Advice
Fits standard UK 2" outlet cistern apertures. If your cistern already has a functioning NIS cradle installed, you can twist the new valve body directly into the existing cradle in seconds without disconnecting the cistern-to-pan close coupling bolts. For new or full installations, use the included base cradle and secure with standard coupling washers.



