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Message: [QUOTE="Sean Regan, post: 227657, member: 5841"] Yes that alkathene pipe has many uses. It supplies water from a tap below our kitchen window along the bottom of the fence, the concrete threshold of the door, into the garage and to the basin and hot water heater in the room in the back of the garage and to my lawn sprinklers valve and the tap on the side of the shed. Another length goes from the base of the shed along the length of the side fence about 8" below the level of the soil and into our tea-house base. It houses the electrical cables from the small consumer unit on the back wall of the shed, for all the functions in the teahouse. Anyone would be hard pushed to cut though it with a spade. The koi pool we had filled with 20 tonnes of fine hardcore, has loose laid flags on top of it. I cemented in the small gap between them and the perimeter rocks. I sank six inch lengths of this pipe every few feet in this filler, as drain holes. Mostly, any rain drains quickly between the flags and sinks into the hardcore. Five feet below the flags is the concrete screed base of the former koi pool, but I drilled lots of 1" holes through it for water to drain into the sandy subsoil. Whenever it rains, any that falls on these flags quickly disappears, The drain holes I made probably don't get used much, but "periodicaly" I stick a cane down them to make sure they stay clear. [/QUOTE]