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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesAu SgHWT Haus- und Wassertechnik AG
HWT Haus- und Wassertechnik AG Logo
Verified· 3 sourcesTrust Score
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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HWT Haus- und Wassertechnik AG

✓ Offered
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.
Trust & reputation

ranQ Trust Score of HWT Haus- und Wassertechnik AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 58% · As of October 2026

Without public customer reviews the score stays capped.

HWT Haus- und Wassertechnik AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
HWT Haus- und Wassertechnik AG scores 89.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
HWT Haus- und Wassertechnik AG scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
HWT Haus- und Wassertechnik AG scores 39.5 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.25.74%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.53.34%
Qualifications+0.00

HWT Haus- und Wassertechnik AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 58%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.100.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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