Here are 15 common questions and answers in the category plumbing (vvs) for the Swedish construction industry. Every answer is anchored in primary law (PBL, BBR, KTjL, AFS, ABS 18, AB 04) and authoritative guidance. The data is open and free to use with attribution.
New bathroom: 40,000–80,000 SEK in plumbing work. Moving kitchen pipes: 10,000–25,000 SEK. Main pipe replacement in a house: 150,000–350,000 SEK. ROT on the labour. Säker Vatten-certified plumbers are standard.
Sources: Branschindex 2026
Certification for plumbing firms working under industry rules (BBV-documented waterproofing, correct installation instructions). A requirement from insurance companies in case of water damage. Zaragoza AB works with Säker Vatten-certified firms.
Sources: Säker Vatten
Copper pipes 50–80 years, plastic pipes 50 years, cast iron drains 80–100 years. Replace in good time if stains or leaks appear. Main pipe replacement in multi-family houses is usually planned when all systems age together.
Sources: Branschpraxis
Work affecting shared systems (apartments: stacks and drains) requires permission. For single-family houses: normally no authority permits, but the municipality may require notification for larger changes.
Sources: BBR 6
Replacement of shared stacks (water, drainage, heating) in multi-family buildings. A large project (6–12 months). In condominiums: the association decides and is responsible. Cost: 80,000–200,000 SEK per apartment.
Sources: Bostadsrättslagen
A heat pump using stored heat in the ground (borehole 100–250 m deep). High efficiency (COP 4–5), low running cost. Investment 150,000–300,000 SEK. ROT on installation plus possible 50% climate subsidy.
Sources: Energimyndigheten
Yes, waterborne underfloor heating is a common new standard. Works well with a heat pump. Requires thicker concrete slab/joists. Electric underfloor heating is simpler but more expensive to run. Cost 600–1,200 SEK/m² installed.
Sources: Golvvärme-branschen
Signs: discoloured patches, mould smell, higher water bill. Infrared cameras and moisture meters are used by professionals. Insurance companies expect notification within days of discovery.
Sources: Svensk Fuktkontroll
Waterborne: better economy with heat pump/district heating, more even heat. Electric: cheaper to install, flexible placement, more expensive to run. Choice depends on the house's heat source.
Sources: Energimyndigheten
Fat in the drain solidifies and creates blockages. A major demand on Skåne municipalities' sewer networks. Private individuals: put fat in a container/rubbish bag. Restaurants and food businesses: a grease trap is mandatory.
Sources: VA-branschen
Rule of thumb: 50 l/person in the household. Modern with reheating: 200–300 l is enough for a family of 4. Heat-pump water heaters are more efficient but more expensive.
Sources: Branschdata
Obligatorisk Ventilationskontroll (mandatory ventilation inspection). Statutory inspection of ventilation in multi-family buildings and public premises every 3–6 years. Carried out by a certified OVK inspector.
Sources: SFS 2011:338
Simple jobs (replacing a gasket, fitting new equipment to existing connections) yes. Anything involving waterproofing, stacks or installation behind walls: a professional with Säker Vatten is recommended/required.
Sources: Säker Vatten
Slope towards the drain, measured as mm per metre. Standard: 10–30 mm/m for drain pipes. Wrong fall → blockages or standing water → leaks.
Sources: AMA VVS
Combi boiler: heating + hot water in one unit, compact, cheaper. Separate: water heater + boiler, better for high hot-water use, flexible. Modern houses: often heat pump + separate hot-water tank.
Sources: Energimyndigheten