– Live Flow Installations– Little/No Bypass– 6″ – 200″+ Solutions– No Chemicals– Round & Non-Round– Fully Structural Spiral Wound Lining Spiral Wound pipe lining fully restores deteriorated pipelines without digging.A continuous strip of PVC is mechanically wound to form a uniform liner. 6" - 42" Expanding liner results in a tight-fit groutless solution. SPR™EX 40" - 60" Lining against pipe wall for groutless tight-fit solution. SPR™TF/RO 32" - 200"+ Round/non-round large diameter lining solution. SPR™