Siamp Optima 50 Cable-Operated Dual WC Flush Valve - 1.5in and 2in Outlet
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The Siamp Optima 50 is an adjustable dual flush valve for compatible ceramic or plastic WC cisterns. Its adjustment range helps match common replacement installations while the supplied actuation arrangement controls the flush from the cistern lid. Check the lid hole, outlet hole and cistern height before ordering.
| Brand | Siamp |
| Model | Optima 50 |
| Flush type | Dual flush |
| Flow rate | 3.5 l/s |
| Adjustable height | 272 to 482 mm |
| Lid hole size | 16 to 50 mm |
| Cistern outlet size | 58 to 72 mm |
| WRAS approved | Yes |
| NF certified | Yes |
| Manufacturer part no. | 32500210 |
| Pack quantity | 1 |
Hand-tighten the flush valve nut to the ceramic and add no more than a quarter turn with a spanner — over-tightening damages the mechanism and is not covered by Siamp’s warranty. Mount the button on the lid with its nut, remove the escutcheon if the lid hole is 38 to 45 mm, and clip the cable case before replacing the lid. Maximum water level is 20 mm below the overflow. Use no limescale or chlorine cleaners in the cistern.
Specification sheet (PDF) · Installation manual (PDF) · See related WC cistern parts.
