Irrigation from a water butt for GH

In my current GH each border has some very old seeping hose/tube buried about 6 inches deep beneath the soil fed from a 150L water butt say 12" above ground level.  I acquired the old hose from a neighbour  and it is made of a white permeable synthetic fabric with a black plastic strip reinforcement along its length.   I've not found anything like it on sale today and would like to find an alternative.   I have tried several different sorts of the black recycled rubber seeping hose, recommended  for use with butts,  with no success whatsoever,  I assume because of the lack of water pressure.

Has anyone  got any bright ideas or experience of an irrigation system fed from a water butt for my new GH, preferably a seepy hose buried rather than drip taps on the soil surface (which I may end up with).