Perhaps you could disguise it as plastic waste or downpipe.
Slit a length and you may be able to open it enough to clip round the copper pipe. A few clamps will hold it closed. Maybe put a fake shoe on the bottom and a fake hopper on the top.
Or disguise it as plastic electrical conduit, and attach a lamp to the end, or an outdoor socket for the lawnmower. Or disguise it as plastic waterpipe, and attach a tap.
Move house?