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masterblaster14 Nov 2025 11:23Hello,
I want to install a water pipe myself in an attic, set up a hot water tank there, and then run pipes from it to two bathrooms.
The old pipes inside the walls will remain in place.
The distance is relatively short. It is 15 meters (49 feet) from the main water connection.
Only one water pipe will be installed, as the water is heated close to the bathrooms.
I have already researched a bit but would like to hear your opinions.
My questions:
What material would you use?
What wall thickness do you recommend?
What are the advantages and disadvantages?
I want to install a water pipe myself in an attic, set up a hot water tank there, and then run pipes from it to two bathrooms.
The old pipes inside the walls will remain in place.
The distance is relatively short. It is 15 meters (49 feet) from the main water connection.
Only one water pipe will be installed, as the water is heated close to the bathrooms.
I have already researched a bit but would like to hear your opinions.
My questions:
What material would you use?
What wall thickness do you recommend?
What are the advantages and disadvantages?
Supply line in copper 22mm (7/8 inch), alternatively composite pipe depending on the system 20mm (3/4 inch) or 25mm (1 inch).
2 full bathrooms, one electric pressure storage tank, 200 liters (53 gallons) should be sufficient. This also requires a drain.
There is only one drawback: you are not authorized to install potable water pipes yourself.
If damage ever occurs due to "your" water pipe and the insurance company considers your work unprofessional, it could become problematic.
2 full bathrooms, one electric pressure storage tank, 200 liters (53 gallons) should be sufficient. This also requires a drain.
There is only one drawback: you are not authorized to install potable water pipes yourself.
If damage ever occurs due to "your" water pipe and the insurance company considers your work unprofessional, it could become problematic.
masterblaster schrieb:
Install a domestic hot water tank yourself in the atticAlso, have the structural stability checked.M
masterblaster17 Nov 2025 00:10Thanks for the responses. I want to install potable water pipes made of aluminum-plastic composite using a hydraulic hand press tool for 22 or 26mm (7/8 or 1 inch) fittings... Who has experience with press tools? ... With an electric boiler in the roof structure due to a solar roof... Thanks...
You probably won’t get much help with that here. Most people here do very little work themselves, and almost no one handles the plumbing.
My only advice is to study the relevant recognized technical standards carefully, including aspects like pipe lengths. Then a lot of research online, including YouTube, can be very helpful.
My only advice is to study the relevant recognized technical standards carefully, including aspects like pipe lengths. Then a lot of research online, including YouTube, can be very helpful.
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nordanney17 Nov 2025 08:38masterblaster schrieb:
I want to install aluminum-plastic composite pipes for drinking water using a hydraulic hand press tool with 22 or 26 mm (7/8 or 1 inch) fittings… does anyone have experience with press tools?I do. What exactly do you want to know?