Product Overview

Copper threaded backflow preventer is a device used to prevent backflow of water and protect the safety of piping system, which is widely used in water supply system, fire fighting network and industrial piping. The preventer is mainly used in piping systems for water, sewage and other mildly corrosive liquids, and is suitable for domestic, commercial as well as industrial water systems, especially for drinking water piping. The copper material has good corrosion resistance and antimicrobial properties, ensuring that it is not susceptible to rust or corrosion in long-term use. Product features include compactness, ease of installation, high pressure resistance, durability, and resistance to clogging. The design of the copper threaded backflow preventer ensures that the water flow can only be unidirectional, and once an abnormal flow direction is detected, the valve will automatically close, thus preventing harmful substances from backing up back into the water supply system and safeguarding the safety of water quality. Its main function is to effectively prevent the backflow of water in the pipeline and avoid the harm of pollutants to the water supply system. It is an important equipment for safeguarding water quality and hygiene and ensuring the safe operation of pipelines, and is widely used in water treatment and supply systems where backflow and pollution need to be prevented.

Main characteristics

Lead-free copper construction: meets NSF/ANSI 61 and WRAS drinking water safety standards. Resists corrosion and scaling in chlorinated water environments.

Threaded connection: NPT (National Pipe Thread) or BSP (British Standard Pipe Thread) for tool-less installation. Compact design saves space and is suitable for narrow installation environments.

Low resistance flow path: optimized internal geometry reduces pressure drop (Cv ≥ 1.0 at DN 25). Spring-assisted flap ensures fast closing and prevents water hammer.

Durable seals: EPDM or NBR seals ensure zero leakage (Leakage Class VI per ISO 5208). Suitable for temperatures up to 120°C (248°F).

Compliance: Meets ASME B16.34, ISO 228 and EN 1254 standards.

Product Advantages

Safe for drinking water: lead-free copper ensures compliance with global water safety regulations.

Easy to install: threaded connections eliminate the need for welding, reducing labor hours and costs.

Corrosion resistance: suitable for chlorinated water and humid environments.

Low maintenance costs: self-cleaning design and replaceable seals extend service life.