Dave,

The problem's not likely the hose, but the little valve that's at the top of
the siphon break. If you can, dismantle the siphon break and carefully
inspect the "duck bill" valve, there's probably some scale or buildup
reventing a full seal. The siphon break acts like a one way vale that is
supposed to only allow air to flow into the loop.

Pierre.

"Dave" wrote in message
om...
I spent a bit more time looking at the problem today and found I could
easily blow air through the hose ("downstream" from the siphon break).
If there's a blockage, it must be slight. Next I'll try pouring some
anti-scale formula into the hose. I would appreciate any thoughts on
what might be causing this.

Dave
J/40 #63