Sometimes this poor boy gets perplexed, which is a nice change from the confusion that normally hangs out in this old head...but really...reading all of the above....now I know that Australian pubs for the most part only sell what is described as Megaswill but surely none of you can be unaware of the notion that a pub that sells good beer is a pub that keeps its lines clean. I grew up next to a pub, I read Dr Seuss with the Publicans children, my Uncle owned a Pub about a kilometer down the street, there used to be a pub across the road till it burnt down but there was another one a block away and at least one pub on the way to my Uncle's who was located next door to another pub, with another pub a block away and then two or pubs just round the corner in a town of 7000 souls so maybe the publicans of my old town paid special attention to their lines. I will check with the old man but I think the lines may have been water flushed every night and left full of water rather than beer, and of course to flush you need to open the tap and flushing is no doubt done at a higher pressure than your punter would want his icy colds poured at, even so they would have been thoroughly cleaned at least once a week.
Low volume, as we have from our set-ups means that the likelihood of crap and gunk building is far higher so it strikes me as reasonable to clean your lines and taps at a minimum as much and as as often as the megaswills.
BTW I have stopped using taps and go for the direct injection method these days.
K