Technically, no such provision need to be made when passing through wood stud. When passing through metal studs some form of protection must be used to protect the pipe from abrasion and to prevent noise. This protection may come from plastic insulated rubber grommets, pipe insulation or similar.

Darsh Industries always recommends use of solvent cement which is specifically manufactured to meet the requirements of ASTM D 2564. All purpose solvent cement should not be utilized. Primers manufactured for uPVC pipe is acceptable.

Tests performed at respected universities and independent laboratories confirm that uPVC is superior to metal systems in terms of water quality effects and “no more toxic than wood” in fire. Darsh Industries uPVC system is manufactured from a compound which is lead free and hence most favoured system in terms of health and safety. LOI(LIMITING OXYGEN INDEX) of uPVC is 45, which means uPVC is not reality burnable in atmosphere. Once the burning source is removed, It stops burning, because of self extinguishing nature of uPVC.

Scale built up is a function of the roughness of the pipe, as measured by the Hazen - Williams, “C” factor, used in the Hazen Williams formula for calculating friction head losses in piping system. Higher value for C results in - less friction, less head loss. In metal systems, once corrosion starts, “C” factor will greatly reduce which results in head loss and scale built up. With Darsh Industires uPVC, there is no corrosion and hence scale built up is inhibited.