VA Tech Wabag Ltd. is an Indian multinational company focussed on desalination and water treatment for municipal and industrial users.

In 1924, Max Reder started Wabag Wasserfilter-Bau AG in Breslau, German Empire (now Wrocław, Poland).

[1] Julius Overhoff's water treatment company, founded in 1930, became part of Austrian Simmering-Graz-Pauker (SGP) AG in 1987[citation needed].

[1] In 1999, VA Technologie (a spinoff from VOEST Alpine) acquired the Wabag Group of Deutsche Babcock, taking over that company's water business.

VAI had dealt with technical solutions for building plants for iron, steel and aluminum, while Siemens made electrotechnical equipment.

Because of antitrust concerns, Siemens had to sell VA Tech's power generation unit, which had 2004 sales of 900 million euros and about 3000 employees.