Plumbing & Building Services

Wateraction SA 

Tolochenaz · Since 1997

The core activity of WaterAction SA is the planning, design and construction of swimming pools and wellness facilities, including related services such as maintenance, repair and renovation. The company offers various types of swimming pools, including concrete pools, overflow pools, mirror pools, as well as hammams, saunas and spas. Additionally, WaterAction SA provides various disinfection methods, such as bromine, chlorine, electrolysis and oxygen activation.

Waterdesign Sàrl 

Chavannes-Près-Renens · Since 2021

The core activity of Waterdesign Sàrl is the distribution of heating and sanitary products.

Wattinger Schwendener Sanitär Heizung GmbH 

Uttwil · Since 2021

Wattinger Schwendener Sanitär Heizung GmbH provides sanitary, solar and heating engineering services, including planning, installation and maintenance of plumbing and heating systems.

W. Benoit SA 

Geneva · Since 1972

The core activity of Benoit W. SA is the renovation and maintenance of heating systems, renewable energy systems, such as solar installations, heat pumps and pellet heating systems, as well as 24-hour emergency repair services.

WB Haustechnik & Kaminfegergeschäft GmbH 

Schaffhausen · Since 2015

The core activity of WB Haustechnik & Kaminfegergeschäft GmbH is the provision of services in the field of building technology and chimney cleaning.

Wegmüller Rohrreinigung GmbH 

Ostermundigen · Since 2024

Wegmüller Rohrreinigung GmbH performs drain and pipe cleaning and provides inspection, maintenance and tightness testing for drainage systems. Services include sewer and pipe video inspection, condition surveys, rehabilitation planning and suction works.

WENGER SANITAIRE 

La Chaux-De-Fonds · Since 2008

WENGER SANITAIRE is a plumbing and sanitary services company. Its services include repair and maintenance of sanitary installations (fittings, WC tanks, sinks), bathroom and kitchen renovations, installation and descaling of water heaters, high-pressure drain cleaning, CCTV pipe inspection, leak detection, replacement of water and waste pipes, and measures to bring installations to standard and save water.

Wernli Heizung + Sanitär GmbH 

Remigen · Since 2013

Wernli Heizung + Sanitär GmbH provides sanitary services including consultation, planning and execution for bathrooms and kitchens, covering new and conversion projects, renovations and repairs, bathroom conversion planning, coordination of renovation work and site management.

WERUSA & SPYCHER AG 

Brüttelen · Since 1998

WERUSA & SPYCHER AG provides building services and sewer solutions, offering sanitary installations, pipe and sewer cleaning, and sewer rehabilitation including inliner and pointliner techniques. Services also include leak testing, sewer inspection/analysis and an on-call emergency service.

Wetec Service und Verkauf AG 

Dättwil Ag · Since 1996

The core activity of Wetec Service + Verkauf AG is the provision of services and sales in the field of building technology, particularly in the areas of heating, ventilation, air conditioning, sanitation and electrical engineering.

WICKI Heizungsmontagen GmbH 

Römerswil Lu · Since 2023

The core activity of Wicki Heizungsmontagen GmbH is the planning, installation, maintenance and repair of all types of heating systems, including floor heating, geothermal connections, heating distributors and temporary deployments of qualified heating technicians.

Widmer & Bühler Haustechnik GmbH 

Basel · Since 1995

Widmer & Bühler Haustechnik GmbH provides plumbing and heating services, including bathroom planning, new construction and renovation, installation work, and service and repairs. The company carries out boiler revisions and gas installations and coordinates with other trades to offer comprehensive project execution.

Widmer Verdampfer Lüftung Klima AG 

Wohlenschwil · Since 2019

The core activity of Widmer company is the installation, maintenance and distribution of climate systems, particularly Samsung air conditioning and heat pumps, as well as evaporator cleaning and ventilation services.

Wild Armaturen AG 

Jona · Since 1976

The core activity of Wild Armaturen AG is the development, manufacture and distribution of fittings and molded parts for pipeline construction, particularly for the water, gas, sewage and manhole casting sectors. The company offers a wide range of products, including pipes, molded parts, connection systems and tools, which are used for municipal water and energy supply as well as for the construction of shaft systems.

Willfratt Gebäudetechnik 

Herrenschwanden · Since 2006

Willfratt Gebäudetechnik designs, plans and installs building automation, photovoltaic systems, and DC heating and pool systems. Services also include energy management and heat-recovery integration, thermal insulation and infrared measurements, LED lighting and large-format displays, network cabling, electronic control development and technical reports in accordance with SIA standards.

Wipf Sanitär - Anlagen 

Marthalen · Since 2019

Wipf Sanitär is a company specializing in sanitary installations.

WISA-Technik GmbH 

Ebikon · Since 2014

WISA-Technik GmbH is a family-run company providing water and wastewater technology and sanitary services. The firm designs, fabricates and installs industrial and building pipework, performs CNC machining of plastics and supplies systems and components for applications such as pumps, UV disinfection, reverse osmosis and galvanic processes.

Wisler Sanitär und Heizungen AG 

Willisau · Since 2016

The core activity of Wisler Sanitär & Heizungen AG is the provision of services in the areas of sanitary, heating and ventilation, including drain cleaning, boiler descaling, heating replacement, new and renovation work as well as planning.

Hälg & Co. AG, Zweigniederlassung Otelfingen 

Otelfingen · Since 2025

Hälg & Co. AG, Zweigniederlassung Otelfingen provides ventilation cleaning and related services. Work includes cleaning of comfort ventilation, industrial and kitchen extraction systems, with on-site checks and quotations carried out in accordance with the SWKI VA 104-01 guideline.

WPlan GmbH 

Hergiswil Nw · Since 2022