On Fri, 02 Mar 2012 20:14:25 +0000, Fredxx wrote:

I found the inertia of water in the pipe was significant in reducing
loss in the time the pipe was open. 16-20 ft of head is still over 0.5
Bar pressure.

Yeah but with the system blocked off you don't have 1/2 a bar of
pressure squirting nasty black SLF onto the carpet or up the wall
paper...

You might get a desert spoonfull of drible but that's about all.

--
Cheers
Dave.