In April 2003 the UK Engineering and Physical Sciences Research Council (EPSRC) and a
diverse group of interested parties began funding a number of major projects looking at the …

This paper represents the most thorough examination of siphonic system priming to date.
Data is presented which has been obtained from a number of systems. The text details the …

The past 10 years have witnessed significant changes in the way roof drainage systems are
understood and designed. In particular, there has been a stepchange in the confidence with …

Siphonic roof drainage systems have been in existence for approximately 30 years, and are
becoming an increasingly common element of urban drainage infrastructure. In that time …

Although siphonic roof drainage systems have been installed in Europe since the 1970s, the
design of such infrastructure is still based on steady state theory. Such approaches are only …

The main purpose of this study was to examine negative pressures in siphonic downpipes
and to see whether these can be controlled through breaking the siphonic action by injecting …

This paper investigates the mechanisms of two-phase flows that occur in commercial and
industrial roof drainage systems. Both traditional gravity-fed and siphonic roof drainage …

An investigation is presented into how negative system pressures, the degree of aeration,
and gutter water levels are affected by the number of outlets in a siphonic roof drainage …

An experimental investigation into air entrainment in siphonic roof drainage systems is
presented. By injecting known quantities of air into a 4.7 m high experimental test rig, the …

Siphonic roof drainage is a highly efficient type of drainage system that is particularly
suitable for large buildings and other structures over approximately 4 m in height. Although …