Item Description
Thomas Dudley Hydroflo Compact Delay Fill Bottom Inlet Valve with Brass Tail – 8″ to 12″ (203 mm – 305 mm)
Genuine Dudley Delay-Fill Technology Brass Tail WRAS Approved Made in Britain
The Thomas Dudley Hydroflo Compact Delay Fill Bottom Inlet Valve with Brass Tail is the latest upgraded range of fixed-height Hydroflo valves, available in nine models from 8″ (203 mm) to 12″ (305 mm). Designed for exposed and concealed cisterns, these WRAS-approved valves feature a professional ½″ BSP brass tail and delay-fill technology that only refills the cistern once flushing is complete — helping save water and ensuring compliance with modern standards.
Product Features
- Available sizes: 8″ (203 mm) – 370908, 8.5″ (216 mm) – 370909, 9″ (229 mm) – 370910, 9.5″ (241 mm) – 334604, 10″ (254 mm) – 370912, 10.5″ (267 mm) – 370913, 11″ (280 mm) – 370914, 11.5″ (292 mm) – 370915, 12″ (305 mm) – 370916
- Delay-fill mechanism – cistern refills only once flushing has finished, reducing water use and supporting BREEAM targets
- ½″ BSP brass tail for a professional, long-lasting connection
- Compact body ideal for modern ceramic and plastic cisterns
- Air gap supplied as standard (complies with Water Regulations)
- Suitable for most plastic and ceramic cisterns (exposed or concealed)
- Factory-set fixed height – select the appropriate valve size for your cistern depth
- Unique float arm design prevents detachment and ensures consistent shut-off
- Made in Britain with WRAS certification for assured quality
Details
Each Dudley Hydroflo valve provides smooth, quiet operation and long-term reliability. The delay-fill system prevents premature refilling, while the compact design makes it a perfect fit for tight cistern spaces. The solid brass tail ensures a durable connection and resistance to cross-threading compared with plastic tails.
Inlet Type: Bottom Inlet
Tail Connection: ½″ BSP Brass
Height Options: 8″ (203 mm) – 12″ (305 mm)
Approval: WRAS Approved, Air-Gap Standard
Brand: Thomas Dudley Ltd, Made in Britain
Questions & Answers
What does “delay-fill” mean?
The delay-fill mechanism prevents the cistern from refilling until the flush cycle is complete, reducing water wastage and promoting efficient operation.
Which size should I choose?
Measure your existing valve height from base to float centre and select the closest size (8″ to 12″). Each model is fixed height, so choose the correct variant to suit your cistern depth.
Are these valves WRAS approved?
Yes – all Hydroflo Compact Brass Tail Delay-Fill valves are WRAS approved and Made in Britain, meeting water-saving and compliance standards.
FixTheBog variant range covering codes: 370908 – 370916 & 334604 | Brand: Thomas Dudley | Type: Hydroflo Compact Delay Fill Bottom Inlet Valve with Brass Tail.
Available Sizes & Product Codes
| Size (Imperial) | Height (mm) | Dudley Code | Notes |
|---|---|---|---|
| 8″ | 203 mm | 370908 | Standard compact height |
| 8.5″ | 216 mm | 370909 | Slightly taller profile |
| 9″ | 229 mm | 370910 | Common replacement size |
| 9.5″ | 241 mm | 334604 | Alternative mid-height option |
| 10″ | 254 mm | 370912 | Fits deeper cisterns |
| 10.5″ | 267 mm | 370913 | For larger capacity cisterns |
| 11″ | 280 mm | 370914 | Extended reach version |
| 11.5″ | 292 mm | 370915 | Tall cistern applications |
| 12″ | 305 mm | 370916 | Largest fixed-height model |
Need help figuring out if this product is right for your setup?
Send us your best bathroom selfies (or, you know, just your bathroom setup pics) to [email protected] or WhatsApp 07359 625424 us, and we'll help you flush your confusion away!