I would think it has something to  do with the shaft seal on the pump. I
believe these are centrifugal pumps. An accumulator would keep a
constant pressure on the shaft seal even when the pump is idle.
Running the pump only to supply water to the faucet would not. Martec
sells a magnetically coupled centrifugal pump and has no seal to fail.
It's pricey, but dependable. I used them in Marine A/C and refrigeration
systems I installed.

Philip

On Thu, 2011-03-03 at 09:40 -0800, Sea Quell crew. wrote:
> Please post to the list if you find out the reason for that statement.
-- 
S/V ORYOKI
Currently lying in Beaufort NC

"There's no point in making a plan if
 you're going to pretend to follow it!"

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