Sewer rehabilitation Switzerland – 130,000 kilometers of sewer network, a trenchless method, and a partner with 6 locations

In Switzerland, the direct supervision of private property drainage systems lies with the respective municipality. The canton exercises an overarching supervisory function and approves the municipal wastewater regulations. The legal basis is formed by the federal Water Protection Act (GSchG) and the Water Protection Ordinance (GSchV). According to Art. 15 GSchG and Art. 14 GSchV, the owner of a wastewater system must ensure that it is kept in perfect condition both structurally and operationally. In practice, this means: your municipality is your contact person – and we are your technical partner for implementation.

Yes. The method is applicable in all cantons and municipalities in Switzerland and is recognized as a standard method by both the VSA and the cantonal water protection authorities, provided that pipeline capacity and condition permit it. Over 90% of typical damage patterns—cracks, leaky joints, root intrusion, and corrosion—can be repaired without digging. Only in cases of completely collapsed or severely deformed pipes is local intervention unavoidable. The specific requirements for documentation and acceptance vary from canton to canton and from municipality to municipality—we handle that for you.

The actual construction time for most projects is between one and three working days – regardless of whether the property is located in Zurich, Bern, Lucerne, or a rural area. Larger developments or commercial properties can take one to three weeks. In addition, there is the lead time for quotations and coordination with authorities – between two and eight weeks, depending on the canton and municipality. In emergencies, our 24/7 on-call service is available: we will travel as quickly as possible from our nearest location.

The relevant standards are uniform throughout Switzerland: SIA 190 (Sewer Systems) and SN 592 000 (Property Drainage). In addition, the VSA guidelines «Maintenance of Sewer Systems» and the VSA-OKI recommendation «Property Drainage» from 2018 apply. The VSA guideline is authoritative for the leak test. Furthermore, cantons and municipalities may issue their own implementation regulations – which we know and adhere to in every region.

The technical service life is 50 to 70 years – comparable to a completely newly laid pipe. The warranty is based on SIA Standard 190. Liner manufacturers additionally grant product warranties of up to 10 years. Furthermore, the smooth inner surface of the liner has the advantage that deposits form more slowly and maintenance costs are reduced in the long term.

Yes, without exception. Without current channel television recordings, neither the correct procedure nor a reliable offer can be determined. Camera inspection is a official requirement for the renovation permit in all cantons. We carry out the inspection with our own high-resolution camera technology and provide the complete inspection report – in the format your municipality requires.

The Federal Water Protection Act is clear: the property owner bears the costs for the operation, maintenance, and rehabilitation of private property drainage systems. In the event of sudden damage – such as a pipe burst with consequential damage – either the cantonal building insurance or your building water insurance will cover it, depending on the policy. Wear and tear due to age is not an insured event. However, sewer rehabilitation costs throughout Switzerland are generally tax-deductible as property maintenance that preserves value – in all cantons. We provide complete documentation for the municipality, insurance company, and tax authority alike.