Toilet valve designed to upgrade cistern performance and reduce water use, the SIAMP Optima 49 Toilet Valve combines adjustable fitting and dual-flush functionality. Homeowners and tradespeople gain confidence from quick installs and WRAS approval for compliant bathrooms. Is it the right replacement for your cistern and household needs?
⚡ At a Glance
- • Flush Performance: Efficient clearing, with users reporting bowl-cleaning flushes in a single cycle
- • Best for: DIYers and plumbers replacing or upgrading Siamp valves in cisterns from major brands
- • Not ideal for: Cisterns that lack Siamp-compatible fittings or require specialised internals
Dual-flush mechanism with adjustable height and overflow control for flexible installation. Designed to replace existing Siamp valves in many branded cisterns without removing the pan.
Lower water use and reliable clearing - with dual flush mechanism
Dual flush supplies two different water volumes so lighter flushes use less water while fuller flushes clear heavier waste. Adjustable overflow helps maintain the correct water level to ensure consistent clearing.
Fewer repeat flushes and lower water consumption, making it practical for households aiming to reduce waste.
Fast repairs and minimal disruption - with replaceable Siamp design
Designed to replace an existing Siamp flush valve without removing the cistern from the WC pan, enabling access through the usual service opening. User reviews note quick fits and installations manageable by small hands.
Rapid, low-mess replacements reduce labour and disruption, suitable for straightforward DIY swaps or trade repairs.
Adaptable fit and safe operation - with adjustable height and overflow
Adjustable height allows the valve to match different cistern depths while overflow control manages maximum water level. WRAS approval confirms suitability for installations where contact with potable water is a consideration.
Flexible installation reduces the need for additional components and helps prevent overfilling, giving reliable daily operation.
✨ The 4 Key Reasons for SIAMP Optima 49 Toilet Valve
- Quick-fit design – Installable without removing the cistern for fast, low-mess repairs
- Spare parts included – On-site replacement avoids extra trips for missing components
- No water shutdown needed – Some installations complete without turning off the supply, per user reports
- WRAS approval – Complies with UK water standards for safe potable water contact
📋 Technical Details at a Glance
- Category: Home Improvement - Toilet Valve
- Brand: SIAMP
- Model: Optima 49
- Product ID: B00LPLNBAE
- Approval: WRAS Approved
❓ Frequently Asked Questions
Q: Is the valve easy to install?
A: Yes, user reviews describe very easy installation and quick-fit replacement, and the valve is designed to be replaced without removing the cistern from the WC pan.
Q: Is the valve compliant with UK water regulations?
A: Yes, the valve is WRAS approved, indicating conformity with UK standards for components that contact potable water.
Q: Will it fit my cistern?
A: The valve is pre-fitted in products by Vitra, Twyford, Lecico, Roca and many more and is intended as a direct replacement for existing Siamp flush valves; compatibility beyond those fittings should be checked against the cistern's requirements.
🏆 Our Verdict
The SIAMP Optima 49 Toilet Valve suits homeowners and tradespeople who need a straightforward, compliant replacement for common cisterns. WRAS approval, dual-flush operation and adjustable height deliver practical water savings and flexible installation. While initial purchase options vary, long-term value comes from included spare parts, quicker repairs and reduced water use.
