Dudley 9.5” Hydroflo Compact Delay Fill Bottom Inlet Valve with Brass Tail – 2025 Upgraded Version (334604)

Reliable, Quiet & Water-Efficient – Now Even Better with the 2025 Upgrade

The Dudley Hydroflo 9.5” Compact Delay Fill Bottom Inlet Valve (334604) is the perfect WRAS-approved replacement for modern ceramic and plastic cisterns. Designed to fit in compact installations, it ensures quiet and efficient refilling, reducing water waste with its delay fill function. The newly upgraded 2025 model enhances durability, simplifies installation, and improves overall performance.

2025 UPGRADED FEATURES:

• New 2-Piece Filter Design – Replaces the previous 3-piece system for easier maintenance.
• No Filter Extraction Key Required – Prevents outlet valve obstructions for smooth operation.
• Stronger & More Durable Build – Long-lasting reliability with fewer components.
• Cost-Effective Maintenance – Fewer parts mean lower long-term upkeep.

PRODUCT FEATURES & BENEFITS:

• Product Code: 334604
• Compact Design – Ideal for tight spaces, ensuring no interference with the syphon or outlet valve.
• Adjustable Waterline Range (140mm - 220mm) – Flexible installation for various cistern sizes.
• Professional ½” Brass Tail – High-quality, durable construction.
• Water-Saving Delay Fill Action – Refills only after flushing is complete to prevent waste.
• Integrated Quiet Fill Technology – Minimizes noise during refilling.
• Tool-Free Flow Regulation – Works efficiently at all water pressures without adjustments.
• Innovative Float Arm – Prevents detachment, ensuring reliable operation.
• WRAS Approved – Fully compliant with UK water regulations.

WHY CHOOSE THE 2025 MODEL?

• Easier Installation – Simplified design for hassle-free fitting.
• Enhanced Reliability – More durable construction for long-term use.
• Better Value – Improved efficiency with lower maintenance costs.

The Dudley 9.5” Hydroflo Compact Delay Fill Bottom Inlet Valve (334604) is the ideal choice for both professionals and DIY installers, offering superior performance, water efficiency, and reliability.

Upgrade your cistern today with the latest 2025 Hydroflo model!

DETAILS

SPARES:  BE PREPARED -  The diaphragm in this Inlet valve will perish over time and diminish the flushing mechanism.   Consider purchasing a spare washer so you have it at hand when needed.  The link is here.

INSTRUCTIONS:  Instructions for the Inlet Valve can be found here. 

CHOOSING THE CORRECT SIZE 

There are 9 sizes in the Hydroflo Airgap Compact Float Valve.  You need to ensure you purchase the correct height please see second image.

FAQs

Q1. How do Dudley fillings valves cope with high and low water pressure.

The current range of fully compliant Hydroflo inlet valves, come pre-fitted with a flow regulator, so no need for a flow restrictor. Our previous range were supplied with a flow restrictor, which needed to be removed for water pressures below 1.5 bar. As these inlet valves operate on an equilibrium principle, which uses the supply water pressure against itself to operate the valve they are suitable for use on water pressures between 0.1 bar and 14 bar.

Video for Hydroflow Inlet Valve 

Dudley 9.5 Hydroflo compact delay fill bottom inlet valve with brass tail 334604

FTB12742