Our experience in mechanical piping is extensive. It covers HVAC piping design, coordination, fabrication and installation for projects of every size and complexity. In addition to our expertise in traditional piping materials and systems, we are leaders in design and installation of refrigerant piping for VRV/VRF systems.

On the domestic water and waste front, our licensed plumbers have the skills to handle any type of plumbing installation. New buildings, retrofits, upgrades, tenant improvements, maintenance – there’s not much we can’t handle. One source and one call is all it takes.


Press Blocks

2017.  This spring Alliant Systems was awarded the mechanical and plumbing scope for the Press Blocks, a large multi-family project in the Goose Hollow neighborhood of Portland.  The project consists of a full block and a ½ block where the Oregonian used to house its printing facilities.  The full block will be home to a […]

Alliant Wins SMACNA Safety Award

Alliant was the second place winner in the 2016 SMACNA Safety Excellence Award Program for having an outstanding safety and health record in the 200,001 to 300,000 man-hour category.  With a mod rate of 0.57 this year, we demonstrate every day that safety comes first!