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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,194 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesAu SgHWT Haus- und Wassertechnik AG
HWT Haus- und Wassertechnik AG Logo
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HWT Haus- und Wassertechnik AG

Summary

About the company

The core activity of HWT Haus- und Wassertechnik AG is the provision of services related to water, including sanitary installations, bathroom renovations, heating, specialized planning, swimming pool construction and maintenance, plastics factory and pipeline construction. The company also offers a 24-hour emergency service.

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Products & services

Industry:Plumbing & Building Services
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8
Sanitary installations
Planning, installation and maintenance of sanitary systems, bathroom planning and renovation, as well as special solutions for residential and industrial buildings.
Bathroom conversions
Bathroom planning and conversions with 3D visualisation, coordination of all work and implementation according to agreed deadlines.
Heating
Planning and proposals for heating systems, in particular renewable heating solutions with heat pumps, including initial consultation and building permit submission.
Sanitary specialist planning
Planning and implementation of energy-efficient building services installations end to end, with project management and technical documentation.
24-hour emergency service
24-hour emergency service for sanitary problems such as flooding, burst pipes and blocked WCs, also in the evenings, on Saturdays and Sundays.
Swimming pool construction and service
Planning, construction, renovation and maintenance of swimming pool facilities, including remote control, covers, water care and maintenance.
Pipeline construction
Construction of gas, water, wastewater and double-wall pipelines as well as service lines, carried out throughout Switzerland by certified fitters and welders.
Plastic fabrication for municipal structures
Manufacturing of plastic municipal structures for drinking water supply with tailor-made solutions and in-house production.
Press

Media

December 19, 2025Media
«Dienen kommt vor verdienen»
leaderdigital.ch
October 2, 2025Media
Wachstum braucht Lehrlinge
rheintal24.ch
September 30, 2025Media
Hans Huber Stiftung nominiert Magnus Hugentobler aus Au für Berufsbildungspreis
rheintaler.ch
July 4, 2024Media
Vom Einmannbetrieb zum Wassertechnik-Marktführer
leaderdigital.ch
March 25, 2015Media
Bauspenglerei der HWT AG verkauft
tagblatt.ch
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Location

Industriestrasse 26
9434 Au Sg

At a glance

Legal form
Corporation
UID
CHE-106.024.123
Founded
1987 · 39 years
Last commercial register change
June 5, 2026
Employees
11 to 20

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