Dudley Hydroflo Delay Fill, Plastic Tail Float Valve

Complete with 7/8" US Adaptor

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Overview

The Hydroflo® Inlet Valve is engineered as a high‑quality replacement for most plastic and ceramic cisterns, both exposed and concealed. Its compact delay‑fill design saves water and supports BREEAM by ensuring the cistern only begins refilling once the flush cycle is complete.

A unique side‑inlet float arm prevents detachment, delivering long‑term reliability in demanding installations. The valve also incorporates an integrated backflow prevention device, making it one of the safest and most dependable options available. Finished with a durable plastic tail, the Hydroflo® Compact Float Valve provides a lightweight, corrosion‑resistant solution suitable for a wide range of cistern types.

Complete with 7/8″ US adaptor.

Features

To BS1212 part 4
Integrated quiet fill action
Compact delay fill saves water by only opening once flushing is complete
The unique float arm makes it impossible for the float to become detached
New simple and efficient 2-piece filter design
1/2" Plastic tail
Complete with 7/8" US adaptor
Side Inlet and Telescopic bottom inlet available
Adjustable Height 8"-11.5" for telescopic variant
Pack qty 50

For Specifiers

Talk to our team

Helpful files

Download Specification Brochure

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Frequently asked questions

My cistern isn't flushing, how can I check if it's an issue with the flush valve?

Check the tube connections on the valve. On the Niagara pneumatic flush value, the green tube is the reduced flush connection and the clear tube is for the full flush connection. Check the bellows are inflating correctly as there may be an air leak and check they are seated correctly. Check to see if the fault is with the button instead of the flush valve. When disconnected, press your finger over the 2 spigot connector points. Press the full or reduced flush button, do you feel resistance? If you don't, it's likely the button is at fault.