Check valve 1" with ball and connection for 3/4" (17-23mm) hose from device. HL3

Check valve – protection of installations and devices

This check valve with a ball is a reliable protection against dirty water backflow, ideal for use with washing machines and dishwashers. Its construction, based on proven technology, guarantees effective protection of the plumbing installation against contamination and damage. The valve is particularly useful in situations where the device does not have a built-in check valve.

Construction and application

The valve has a 3/4 inch connection for the device hose (with a diameter of 17-23 mm) and a 1 inch thread at the outlet. Made of durable PP plastic, it is resistant to detergents and chemicals present in wastewater. Its main task is to prevent dirty water from flowing back into the washing machine or dishwasher, which could lead to failure or malfunction. Thanks to this, this valve ensures a longer life of household appliances and maintains high efficiency of their operation.

Key features and benefits

• Effective protection: Prevents dirty water from flowing back into the device, protecting it from damage and failures.
• Thermal resistance: Withstands water temperature up to 95°C, making it suitable for use with devices operating at high temperatures (e.g. washing machines washing at 60°C).
• Universality: Fits standard washing machine and dishwasher hoses with a diameter of 3/4 inch (17-23 mm).
• Durability: Made of high-quality PP plastic, resistant to corrosion and chemicals.
• Easy installation: Simple construction allows for quick and trouble-free installation by an installer or end user.
• Compliance with EN 274 standard: Guarantee of product safety and reliability confirmed by a certificate of conformity with the European EN 274 standard.

This valve is used both in new plumbing installations and as a replacement element for a damaged valve in existing systems. This is especially important in the case of older models of washing machines and dishwashers, which often do not have a factory-installed check valve.