backflow preventer การใช้

• To reduce the risk of contamination, a backflow preventer can be fitted.
• :You could start with plumbing here; it's possibly a " backflow preventer ".
• In this case, the water's expansion is probably being limited by a backflow preventer valve or a nonbypass pressure regulator on the water inlet pipe.
• Alternatively, a specialized backflow preventer valve may be installed at strategic locations in the plumbing system wherever there is a risk of contaminated fluids entering the water supply pipes.
• A backflow preventer is also important when potentially toxic chemicals are used, for instance for commercial / industrial descaling of boilers, or when chemical bleaches are used for residential power washing.