Plastic pipes and fittings for natural gas distribution; plastic pipes and fittings for oil and gas gathering; plastic pipes and fittings for potable and non-potable water; plastic pipes and fittings for sewer applications; plastic pipes and fittings for mining applications; plastic pipes and fittings for industrial applications [ ; plastic pipes and fittings for electrical and telecommunication conduit; plastic pipes and fittings for geothermal applications; plastic pipes and fittings for pn...