Can an oil supply line(10mm Plastic coated copper) be secured to the outside rear wall of my house? It needs to route to the KBB valve which is located under the decking before it goes into the kitchen to supply the AGA. I only ask as the rear of the house has a concrete patio which I am reticent to dig up. The wall in question has a Bell drip which would give the pipe some protection from knocks. Any constructive help greatly appreciated.