Backflow-Preventer / Non-return Valves

In our backflow preventer category, you’ll find high-quality check valves with internal threads and compression fittings, providing a reliable solution for your piping system. These valves effectively prevent water backflow, protect your pipelines, and ensure the highest level of safety for your irrigation system.





Frequently Asked Questions (FAQs)

A backflow preventer is a valve that stops water from flowing backward in a pipe system. It prevents contamination caused by back-siphoning and ensures water flows in the correct direction. Its robust construction makes it ideal for use in irrigation systems.

A non-return valve is installed at points where backflow into the water source must be avoided, such as behind a pump or at transitions in the irrigation line. It can also compensate for gradients in your system, preventing lines from running dry.

Irrigation systems are designed for non-potable water. These should be protected from your drinking water network by system separators. While many of our products have DVGW approval and are technically suitable for drinking water, only a professional should perform drinking water installations. Compliance with DIN and DVGW standards demonstrates that the products are safe and tested, making them suitable for garden use. They ensure hygienic and reliable operation for your sprinklers and garden hoses.

These valves feature an internal spring that presses a cone-shaped closure mechanism against the inlet side. This design reliably stops backflow, regardless of whether the valve is installed vertically or horizontally.

Compression fittings allow for quick and easy installation in your system. The valve not only prevents water from reversing but also stops the line from emptying. Our products are flexible to install and require no maintenance.

Yes, check valves with compression fittings are easy to install. Simply insert and screw PE pipes into the valve to create a secure connection. DIY enthusiasts will find the process straightforward.

Check valves vary by material, connection type, and application. For higher pressures or temperatures, brass variants offer exceptional durability. Other models are specifically designed for use with PE pipes.

Most of our check valves are suitable for drinking water, process water, rainwater, and water containing chlorine. However, they are not suitable for saline or highly chlorinated water, as the V2A stainless steel spring may corrode.

Ensure compatibility with your pipe material, maximum pressure, and temperature limits, as well as any drinking water certifications. Our product descriptions provide all the necessary details.

Consider the appropriate size, maximum pressure, intended application, and flow direction. If you have questions, our customer service team is here to assist you in finding the perfect product for your system.

A check valve protects your system from damage caused by uncontrolled backflow and maintains water quality. Particularly when used with a pump, the valve prevents water from flowing back during pressure loss, ensuring stability and efficiency.

Yes, non-return valves are suitable for garden irrigation, water supply systems, cistern setups, and drinking water networks. Always verify compatibility with the intended medium and pressure requirements.

A foot valve is a specific type of check valve typically installed at the end of a suction line in cisterns or wells. It prevents the line from emptying and often includes an integrated sieve to block debris.

Using our free planning software, the DVS irrigation planner, you can design your garden irrigation in just a few steps. The Plug&Rain® system ensures efficient water distribution for your garden. You can then order all necessary materials for installation directly from our online shop.

Planning and Product Selection: How to Choose the Right Non-Return Valve

A backflow preventer is an essential part of your irrigation system. It protects your water supply from contamination and prevents water from being sucked back into the pipes. When selecting a valve, consider its application, desired flow rate, and connection size.

Our high-quality check valves come in various designs. Brass models are particularly popular for their durability and corrosion resistance. Whether you need a valve for use with a foot valve or to secure your garden pump, our range includes the perfect product for your needs. Additional accessories are available to simplify installation.

Easy Installation and Operation

Installing a backflow preventer or check valve is simple. For instance, a foot valve can be attached at the appropriate point in the system. Be sure to follow the correct flow direction to prevent reverse water flow.

Our products are designed to be durable and maintenance-free. The spring-loaded valve mechanism ensures reliable performance whether installed vertically or horizontally. By choosing a high-quality backflow preventer, you protect your system from damage, save time, and optimize pump performance. Add the right items to your shopping cart to perfect your irrigation setup.

Advantages of Backflow Preventers in Garden Irrigation

Backflow preventers are a straightforward way to protect your irrigation system from unintended water flow. They are essential for systems with multiple lines or cistern feeds, preventing water from flowing back into the system. Our valves are designed for compatibility with PE pipes and are easy to handle, making them ideal for DIY projects.

Care and Maintenance of Backflow Preventers

A major benefit of our backflow preventers is their maintenance-free design. Made from robust materials such as polypropylene or brass, they are highly durable and resistant to corrosion. For long-term reliability, regularly check the connections for leaks. In systems exposed to sandy or dirty water, using a pre-filter is recommended to prevent debris buildup in the valve. This ensures your irrigation system remains efficient and reliable.