Pressure testing, temperature control and approved products

An installation is not done when the water flows — it is done when it has been tested, documented, and built from approved products. This is the verification end of Säker Vatten.

Pressure and tightness testing

Pipe installations are pressure- and tightness-checked before being put into service, and the checks are documented. Press-fitted pipes can get a special integrity check designed so an unpressed (incorrectly made) fitting will leak and reveal itself. Changes to existing tap-water or heating installations are tightness-checked at the system's existing pressure. Wastewater lines are checked by flushing and visual inspection.

Temperature control

Once the hot-water-circulation system is complete, temperatures are checked and recorded: at least 60 °C in water heaters and accumulators; a safety function heating the tank at least weekly where a heat pump runs cooler; 55–60 °C on hot-water output to the installation; at least 50 °C in the circulation return and in every circuit; and at most 38 °C at outlets with special accident risk.

Approved products and systems

Tap-water, wastewater and heating installations must be built with pipes and components tested and approved as systems — documented in the supplier's installation instructions — not assembled from mismatched parts. Key product rules include:

• Type approval or equivalent third-party certification showing the product meets BBR and the standard;
• pipe-in-pipe conduits tested to Sintef's method, and exchangeable systems to NT VVS 129;
• near-wall and wall drains approved only together with a specific waterproofing system;
• brass parts in contact with water made of dezincification-resistant material;
• calibrated tools and test instruments where the supplier requires it.

Products carry markings so the installed system is identifiable and verifiable later.

Official source: this is M5's plain-language summary, not the official text. For the full rules see Säker Vatten (sakervatten.se).