What is BS EN 14124 –Inlet valves for flushing cisterns about? 
Inlet valve are valves ensuring automatic filling of a flushing cistern to a pre-set water level.
BS EN 14124 is a European Standard that discusses inlet valves for flushing cisterns with internal overflow.
The purpose of BS EN 14124 is to specify:
- The dimensional, hygiene, tightness, pressure performance, hydraulic, acoustic, mechanical and physico-chemical characteristics which inlet valves for flushing cisterns shall comply with
- The test methods for testing these characteristics
- Marking and presentation
BS EN 14124 applies exclusively to the valve itself and it does not prejudge compliance with health regulations as the inlet valve is being fitted into the cistern.
BS EN 14124 applies to valves such as float valves limit operating at pressures up to NP 10 (whose operating range is from 0,05 MPa to 1 MPa – 0,5 bar to 10 bar) designed to supply cold water to flushing cisterns for use with WC pans, that are permanently connected to a potable water supply system.
Note 1: BS EN 14124 does not cover valves intended to equip flushing cisterns with external overflow.
Note 2: BS EN 14124 does not apply to valves used for other applications: pumping tanks, storage tanks, etc.
Who is BS EN 14124 - Inlet valves for flushing cisterns for?  
BS EN 14124 on inlet valves for flushing cisterns form is relevant to: 
- Manufacturers of inlet valves
- Manufacturer of sanitary installations
- Product designers
- Quality control and testing personnel
- Local bodies 
Why should you use BS EN 14124 - Inlet valves for flushing cisterns? 
Before flushing the toilet, the toilet tank is full of water. The inlet valve is shut and the toilet float is floating at the top of the tank. When you push the flushing handle down, the toilet flapper is lifted off by a lift chain and the water in the tank flows out and down to the bowl through the inlet valve. Improper functioning of these valves can lead to overflow of flushing cisterns.
Thus, BS EN 14124 provides requirements of appropriate materials, dimension, design and construction of these valves for optimal performance of sanitary installations.
BS EN 14124 also discusses the necessary mechanical and hydraulic characteristics along with test methods to demonstrate the performance of inlet valves. As a result, you can determine the quality of inlet valves and whether they exhibit adequate tensile strength, resistance to pressure, effective leaktightness and endurance. This can be particularly beneficial for quality control purposes.
Thus, if you are a manufacturer of inlet valves for flushing cistern, compliance with BS EN 14124 requirements can ensure your products are reliable and effective at the point of use. Consequently, you can achieve adequate backflow prevention, sealing efficiency and minimized risk of leakages.
