SPR™ Machine Wound Spiral Lining

800 mm – 5500+ mm Pipe Lining

Round & Non-Round Shapes

100% Trenchless

The Large & Non-Round Liner

SPR™ is a Machine Wound Spiral Lining (MWSL) method for large diameter sewers, storm drains and culverts. SPR™ lines both round and non-round shapes, providing fully structural rehabilitation. SPR™ liners can structurally rehabilitate brick, concrete, glass reinforced plastic or corrugated metal sanitary sewer and stormwater pipelines with diameters from 800 mm to 5500 mm.

SPR™ MWSL Process

SPR™ Lining Process

SPR™ lining occurs along a guide-frame constructed to mirror the pipeline’s shape. These shapes can be anything from a box, horseshoe, teardrop, arch etc. The SPR™ machine traverses the pipe while pulling PVC profile along to construct the trenchless pipe liner.

Once winding is completed, grout is introduced between the liner and host pipe. Grouting occurs in lifts through a series of ports installed within the liner. Once grouting is finished, the end result is a fully structural rehabilitated pipe.