Siamp Compact 99B Bottom-Entry WC Filling Valve - 1/2in Plastic
The Siamp Compact 99B is a bottom entry WC filling valve with a 1/2 in plastic connection. It controls cistern refill using a quiet hydraulic closure and is intended for replacement or original-equipment installation in compatible ceramic or plastic cisterns. Check the inlet position, connection and internal clearance before ordering.
| Brand | Siamp |
| Model | Compact 99B |
| Entry position | Bottom entry |
| Connection size | 1/2 in plastic |
| Operating pressure | 0.5 to 10 bar |
| Flow rate | 0.15 l/s at 3 bar |
| Dimensions (H × W × D) | 282 x 75.5 x 53 mm |
| WRAS approved | Yes |
| Manufacturer part no. | 30996007 |
| Pack quantity | 1 |
Fit with the inlet rubber washer inside the cistern and seal to the supply with the filter gasket. Hand-tighten the backnut to the ceramic and add no more than a quarter turn — over-tightening damages the valve and is not covered by Siamp’s warranty. Use no sealing paste or compound, and no limescale or chlorine cleaners in the cistern. Tap connector not supplied; Siamp requires an approved check valve at the supply connection. Set the water level 20 mm below the overflow with the grey adjusting screw.
Specification sheet (PDF) · Installation manual (PDF) · See related WC cistern parts.
