The reverse French drain is where the down spouts is solid for the first ten feet of the drain pipe. This is then converted to a PVC pipe that is perforated. This gets discharged to a connected continual trench that is back-filled with drain-rock. The trenches distributes the water into the ground.
A drain is called un tuyau in French. If that drain is the product designe to drain water away from your home's foundations, we would also use "un drain", masculine noun.
The purpose of a French drain is to move water away from your home, protecting it from water damage. You can learn more about french drains at the Wikipedia.
A rubble drain is also called a French drain, blind drain, rock drain, drain tile, perimeter drain, land drain or French ditch. They are constructed by digging a step-sided trench, filling the trench with loose stones, and covering the stones with earth.
No.
French drain system consist of ditch filled with small stones and a small inclination
If there is no drain valve at the radiator you can drain the system at the drain valve on the boiler
No, counterclockwise to loosen.
Gate reverse bias
probably in France
Most likely.
Drain, Waste and Vent System. It is all of the Drain and Waste piping and their associated vent piping
Shops which are mostly for home solutions can be an answer for your problem. In those shops you can find professional employees and ask them for the best quality French drain.