Outlets

A PhD research programme conducted at the University of Sheffield led to the development of the BBA-approved Primaflow series of siphonic rainwater outlets.

Featuring uniquely dimensioned leafguards and internal baffle plates, the outlets are specifically designed to minimise air and debris entering the siphonic system’s pipework. Hydraulic rating curves have been determined to ensure optimum performance across all roof configurations.

With a modular design, carefully selected materials, and a long service life, Primaflow outlets provide a watertight and secure connection to all types of gutters and roof membranes.