Siamp Storm 33A and 99B WC Flush and Fill Component Pack
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The Siamp Storm 33A/99B component pack combines the matched filling and flushing parts listed below for a coordinated WC cistern repair. It is supplied as one manufacturer pack under Siamp part number 35995007. Replacing both mechanisms together is useful where the cistern needs a broader internal service. Check both valve arrangements against the cistern before ordering.
| Brand | Siamp |
| Model | Storm 33A/99B |
| Manufacturer part no. | 35995007 |
| Pack quantity | 1 |
Measure cistern height and lid hole, then set the flush valve stirrup notch and cut the overflow to the table in the manual before fitting. Hand-tighten the flush valve nut and inlet backnut to the ceramic and add no more than a quarter turn — over-tightening damages either mechanism and is not covered by Siamp’s warranty. Use no sealing paste or compound. Tap connector not supplied; Siamp requires an approved check valve at the supply connection. Set the water level 20 mm below the overflow. Use no limescale or chlorine cleaners in the cistern.
Specification sheets: Storm 33A flush valve (PDF) · Compact 99B filling valve (PDF) · Installation manual (PDF) · See related WC cistern parts.
