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Amazon£11.00Visit shop Thomas Dudley Dudley S7 Cascade 9" Syphon Siphon Wras Dual Or Single Flush Cistern 1.5" Bsp Outlet Convert Flush Volume Option
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The Thomas Dudley S7 Cascade Syphon is an ideal solution for homeowners and professional plumbers looking for a reliable, long-lasting replacement for low-level toilet cisterns. This UK-manufactured component is celebrated for its robust build quality and WRAS approval, ensuring safety and compliance with water regulations. While it offers versatile flushing options of 6, 7, or 9 litres, users should ensure their existing cistern dimensions are compatible with the 9-inch height before purchase, as improper sizing can prevent a correct fit.
| Model Part Number | 903273 |
|---|---|
| Brand | Thomas Dudley |
No, it is specifically designed for low-level cisterns and requires a 9-inch clearance.
It means the product complies with the Water Regulations Advisory Scheme, ensuring it is safe for use with the public water supply.
Yes, but you will need to remove the cistern lid to access the syphon settings.
No, this product includes the syphon unit itself; the flush pipe is typically reused or purchased separately.
The outlet is a standard 38mm or 1-1/2 inch size.
With proper installation and by avoiding harsh chemical cleaners, it is designed for many years of reliable service.
This often indicates a worn diaphragm washer at the base of the syphon. Check the washer for debris or hardening and replace if necessary.
Check the connection between the handle lever and the syphon arm. Ensure the link is securely attached and the syphon has enough clearance to move freely.
Inspect the back nut seal. It may need tightening, or the rubber washer between the cistern and the syphon may have become misaligned during installation.
Installation requires basic plumbing tools, including an adjustable spanner and a towel to catch residual water.
For care, avoid using harsh chemical bleach blocks inside the cistern, as these can degrade the rubber seals over time. Periodically check the handle connection to ensure the link remains tight.
