BigWallop wrote:

Unless you want to boil the water. It is simpler to install a
restriction washer to the outlet spout I would think. If the
diameter of the spout is, say, 10 mm full bore. Then placing a
washer with a hole size of 5 mm should greatly reduce the output from
the spout.

Is the fancy head removable ? If it is, then put a small rubber
washer with a smaller hole on top before you put the head back on.


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Rather than waste the pump's output by restricting it, run a "T" off the
output side and divert some of the flow to a home-made venturi (another
"T" with a restrictor on the long side and and an air intake tube into
the short side - you have to experiment a bit to get it right). This
will add valuable oxygenation to your pond and add a little more
movement to the water. Balance the flow between the two outputs with
ball valves on the hoses.
--
Geoff Beale
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