Dudley 9” Hydroflo Compact Delay Fill Bottom Inlet Valve with Brass Tail – 2025 Upgraded Version (370910)

Enhanced Design for Superior Performance & Efficiency

The Dudley Hydroflo 9” Compact Delay Fill Bottom Inlet Valve (370910) is a WRAS-approved, high-performance inlet valve designed for modern ceramic and plastic cisterns. Engineered for smooth, quiet, and water-efficient operation, it ensures a reliable refill while reducing unnecessary water usage. Its compact float design prevents obstruction in tight cistern installations, making it a top choice for plumbers and DIY enthusiasts alike.

The 2025 upgraded version introduces new features that simplify installation and maintenance while enhancing long-term durability.

2025 UPGRADED FEATURES:

• New 2-Piece Filter System – Replaces the previous 3-piece design for easier servicing and improved durability.
• No Filter Extraction Key Required – Eliminates the risk of obstructing the outlet valve, ensuring uninterrupted performance.
• Stronger & More Reliable Build – Enhanced materials for longer lifespan and greater resilience.
• Simplified Installation & Maintenance – Fewer parts make servicing faster and hassle-free.

PRODUCT FEATURES & BENEFITS:

• Product Code: 370910
• Compact Design – Ideal for tight cistern spaces, preventing float interference with the syphon or flush valve.
• Adjustable Waterline Range (140mm - 220mm) – Versatile fit for different cistern sizes.
• Professional ½” Brass Tail – Ensures secure, leak-free connections and long-lasting durability.
• Water-Saving Delay Fill Action – Prevents refilling until after the flush cycle is complete, reducing water waste.
• Integrated Quiet Fill Technology – Minimizes noise during refilling, ideal for domestic and commercial settings.
• Flow Regulation for All Water Pressures – Works without manual adjustments, saving installation time.
• Unique Float Arm Design – Prevents float detachment, ensuring consistent performance.
• WRAS Approved – Compliant with UK water regulations, ensuring safety and efficiency.

WHY CHOOSE THE 2025 UPGRADED MODEL?

• More Efficient & Durable – Improved materials and a simplified filter system enhance reliability.
• Easier Maintenance – No tools required for filter removal, reducing servicing time.
• Enhanced Water-Saving Features – Optimized delay fill action reduces water waste, helping with sustainability.

The Dudley 9” Hydroflo Compact Delay Fill Bottom Inlet Valve (370910) is the ideal choice for professionals and homeowners looking for a long-lasting, efficient, and easy-to-maintain inlet valve.

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 

FTB12741