The term riser is used in the construction industry for any type of pipe, culvert, shaft, etc. that rises up in a vertical direction. A riser can be a waterline, sanitary line, air shaft, ventilation piping or shaft, catch basin vertical section, manhole vertical section, etc. Any item that rises up can be identified as a riser. Care must be taken to properly identify what is being meant by a riser in the construction industry. An architect may use riser, differently from an engineer who uses it differently from the contractors on the site. Riser is a universal term to identify any open conduit, shaft, tunnel, pipe, vent, etc. that rises up in the ground, within the building, rises up in a complicated mechanical assembly, etc.

2 In-BuildingRiser

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The high performance LEGIOMIX digital mixing valve for commercial domestic hot water (DHW) temperature control is now available with ANSI 150 flanges in sizes 2½-inch for 17 to 470 GPM flow rate and 3-inch for 22 to 537 GPM. The valve delivers one of the highest flows in the industry in a single valve compared to multiple valves in parallel. The 3-inch flanged LEGIOMIX is the first DHW control valve in North America that provides a maximum flow rate over 500 GPM. The new flanged sizes complement the existing NPT, press and sweat union connections. The LEGIOMIX digital mixing valve was recently recognized by the AHR Expo as a 2020 Innovation Awards finalist.