L&T replaces 600mm dia PSC water pipeline with 864mm dia MS transmission main in Hubballi-Dharwad February 13, 2024 | Key Segments, News & Developments, Water Supply Larsen & Toubro (L&T) has replaced the 30 years old pre-stressed concrete (PSC) water pipeline (600 mm diameter) with a mild steel (MS) transmission main (864 mm) in Hubballi-Dharwad. This content is restricted.