On Sat, 31 Aug 2013 00:21:16 +0100, Michael Chare wrote:

I suspect that the pump wear will relate to the number of revolutions
which will be the same.

If there is large lift and/or a long bendy/constricted pipe run there
is some risk of cavitation in the pump. You don't want that as it
will damage the pump.

I'm struggling to work out how a tigerloop would stop cavitation, the
only thing lifting/pulling the oil is the pump. AIUI a tigerloop
removes actual bubbles but cavitation is caused by the low pressure
on the pump parts releasing dissolved gases, when the pressure goes
back up the gas redissolves...

--
Cheers
Dave.