Bisson non-return valve | for 25 mm pipe

The Bisson non-return valve is used in aspirating pipework when the system is cleaned (purged): it prevents dust from moving back into certain sections of the pipe run. The fitting is joined with ABS pipe cement; it must not be painted or installed in direct sunlight, the pipe must be clean and dust-free, and only soapy water may be used for cleaning.

Technical data