Pipes burst when frozen (there is no water movement in them).
If you want to avoid pipes from bursting due to freezing,
just keep a small trickle of water going through them at
all times. Sure, you waste some water, but, that'll save
the pipes from freezing and bursting open. (You really need
to do this if you plan to go away for vacation during
a cold snap.)
Sajjad
=====
-- Sajjad Lateef sajjad_at_acm.org /----------------------------------------------------------------------------- /"Unless stated otherwise, comments made on this list do not necessarily / reflect the beliefs or goals of the North American Native Fishes / Association" / This is the discussion list of the North American Native Fishes Association / nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word / subscribe, unsubscribe, or help in the body (not subject) of an email to / nanfa-request_at_aquaria.net. For a digest version, send the command to / nanfa-digest-request_at_aquaria.net instead. / For more information about NANFA, visit our web page, http://www.nanfa.org