For your connection to the water mains, the supply lines should have at most 4 bar (58 psi) of pressure. The house connection must provide a leak-free penetration of the basement outside wall.

Basement distribution
• After the water meter, if necessary, a pressure reduction valve might need to be installed to compensate pressure variations.
• Caution: Install a soil filter as backwash filter (allows soil carried by the water to be backwashed into the sewage).
• Use a bronze or stainless steel water distributor.
• We recommend that you have a water analysis conducted. Based on the results, you can install water treatment (e.g., for high calcium carbonate levels or corrosiveness).
• Ensure certification of the devices (e.g., DVGW, ÖVGW) and regular maintenance.
Hot and cold water piping
• Caution: Plan hot and cold water lines as well as sewage and vent lines before starting construction to avoid troublesome and expensive boring and chiseling.
• Combine supply and drain lines in an installation shaft.
• Therefore plan kitchen, baths and toilets close together or over one another (avoids long, expensive lines).
• Keep hot water loads close together to avoid heat loss in long lines.
• Materials for supply lines include plastic and stainless steel; do not combine stainless steel with other metals.
• Do not run hot or cold water lines outside of walls.
• Insulate water lines continuously and without heat bridges. Ensure adequate insulation (including cold water lines, which otherwise can form condensate).
• Blackwater drain: provide openings for cleaning; ensure adequate gradient (over 2%). Caution: Too much fall creates unpleasant noise.
• A lack of toilet venting causes noise and can evacuate the trap during operation.
Saving water
• Of a total of 150 liters of domestic water consumed per person per day, only 4 liters are actually for drinking and cooking.
• A dripping faucet causes up to 180 liters of water loss per day, and for hot water, energy is wasted as well; replace defect seals and faucets.
• Use water-saving faucets (flow limiters at sinks and shower heads, single-handle faucet, thermostat mixers); water-saving toilets reduce water consumption by one third.
• Use household appliances with low water consumption.
• Plan rain water harvesting for new construction.

Basement distribution

• • After the water meter, if necessary, a pressure reduction valve might need to be installed to compensate pressure variations. 
• Caution: Install a soil filter as backwash filter (allows soil carried by the water to be backwashed into the sewage). 
• Use a bronze or stainless steel water distributor. 
• We recommend that you have a water analysis conducted. Based on the results, you can install water treatment (e.g., for high calcium carbonate levels or corrosiveness). 
• Ensure certification of the devices (e.g., DVGW, ÖVGW) and regular maintenance.

Hot and cold water piping

• Caution: Plan hot and cold water lines as well as sewage and vent lines before starting construction to avoid troublesome and expensive boring and chiseling. 
• Combine supply and drain lines in an installation shaft.
• Therefore plan kitchen, baths and toilets close together or over one another (avoids long, expensive lines). 
• Keep hot water loads close together to avoid heat loss in long lines.
• Materials for supply lines include plastic and stainless steel; do not combine stainless steel with other metals.
• Do not run hot or cold water lines outside of walls. 
• Insulate water lines continuously and without heat bridges. Ensure adequate insulation (including cold water lines, which otherwise can form condensate). 
• Blackwater drain: provide openings for cleaning; ensure adequate gradient (over 2%). Caution: Too much fall creates unpleasant noise.
• A lack of toilet venting causes noise and can evacuate the trap during operation.

Saving water

• Of a total of 150 liters of domestic water consumed per person per day, only 4 liters are actually for drinking and cooking. 
• A dripping faucet causes up to 180 liters of water loss per day, and for hot water, energy is wasted as well; replace defect seals and faucets. 
• Use water-saving faucets (flow limiters at sinks and shower heads, single-handle faucet, thermostat mixers); water-saving toilets reduce water consumption by one third. 
• Use household appliances with low water consumption. 
• Plan rain water harvesting for new construction.