The BauderBLUE ST-HM adjustable flow restrictor is fitted into the rain water outlet and is used to control the flow of water from a blue roof, it is part of the hot melt Bauder blue roof system. It is comprised of four parts: baseplate with stainless steel slide control, overflow pipe, baseplate inner and outer seal. The polyamide baseplate fits within the 70mm vertical outlet, with the EPDM outer seal creating a watertight fit. The HDPE overflow slots into the central hole of the baseplate with an inner EPDM seal preventing any leaks. 

The BauderBLUE ST adjustable flow restrictor is designed to be fitted into a standard Bauder Bitumen Blue Roof Vertical Outlet DN70 as part of a Bauder blue roof system.  

There are two versions of the restrictor, one for use with Bauder’s hot melt system and the other used with Bauder’s differing total roofing system.

The baseplate has a stainless steel slide plate which can be set to 5 positions to control the flow rate for the outlet. The correct position for the plate will be shown on the Bauder Blue Roof Calculation Sheet.