For water supply, we use TRM ductile cast-iron pipes with VRS-Tiroflex® push-pull protected plugin socket connectors. TRM cast metal pipes provide maximum safety and economy in water supply. The water pipe is laid like a flexible chain. It can therefore offest all loads such as vibrations, soil movement, subsidence or pressure impact. On the inside, the pipes are lined with cement mortar, while on the outside they are zinc-plated or coated with Polyurethane.

Ductile cast-iron pipes have several advantages:

• Operating pressure beyond 100 bar
• Fast and simple laying with safety connectors
• 100 mm maximum granularity of the sheathing material
• High flexibility of the connectors = minimal use of formed components 
• Longevity

For the central air supply, we are using Polyethylene tubes compliant with the UNI 7611 - 312 and DIN 8074 – 8075 standards.