The Principal reason for the great economy of uPVC pipe is not so much their cost per meter as delivered at site but the dramatic reduction in installation cost, which can be achieved by intelligent exploitation of their light weight, their availability in longer lengths. Their ease of joining and immunity from corrosion. These characteristics are of even greater importance to Indian Engineers now that the need to carry out Potable Water Supply Schemes etc. at minimum cost is so important to the nation’s economy.

Parameters	Galvanised Iron (Gl) Pipes	Cast Iron Pipes	Asbestors Coment (AC) Pessure Pipes	Rohit Rigid PVC Pipes	Economics advantage of Rohit PVC Pipes
Weight	Heavy	Heavy	Lighter than Cl but hevier than PVC	Light, Pipes, weight 1/6 of Cl, 1/6 of Gl, and 1/3 of AC	Saving in handling and transportation costs.
Length in meters	5-6	3-4	3-4	5-6	-
Inside bore	Rough	Rough	Smooth	Mirror like smooth finish	Fewer joints, saving in installation time and cost.
Coeffecient of flow (C) value	100 for new pipe Decrease over a period of use	100 of new pipe 40-50 after five to 10 years.	140	150 remains constant throughout life	Less friction loss saving in pumping costs.
Resistance to corrosion	Pipes are susceptiable to quality of water and aggressive soil conditions	Pipes are susceptiable to quality of water and aggressive soil conditions	Good	Good resistance to strong acids, alkalis or salt solutions.	Better flow - 25% more than Gl
Formation of deposit (incrustation)	Formation of deposits leading to constriction in pipe bore.	Incrustation leading to constriction in pipe bore	No Incrustation	No Incrustation	Longer life, low maintenance and replacement cost.
Installation technique	Involves threading	Cumbersome and time consuming	easy compared to Cl	Easy, simple, fast.	Speedy Installation.
Material Cost	High	Higher than GI	Lower tah GI	Lower than Cl,GI & AC by 10-30%	Total cost considerably redued.