â¢ Surname is the family name or the last name of a person, whereas first name is the unique name given to a person at birth, also referred to as his Christian name. â¢ Surname is passed down generations, whereas first names are unique depending upon physical attributes or circumstances at birth of a kid.
PVC pipe is available in a wide range of wall thicknesses and strengths (pipe. stiffness). PVC pipe is routinely perforated (slotted) and used as well screen. This same slotted pipe can also be used for toe drains. Slotting is done at the. factory, and slots are available in a wide range of slot widths and POA.
PolyProÂ®. PolyPro and PVC/CPVC PVC pipes are commonly used for venting water heaters, condensing boilers and warm air furnaces, yet PVC was never designed for such use. An environmentally safe and engineered alternative is PolyPro, for condensing gas appliances.olyPro is engineered with a corrosion-free, condensation management system. A chloride-free, fully engineered venting system designed for use with high efficiency furnaces, condensing boilers and tankless water heaters.