On 2008-05-31, ConnetiCat wrote:

Replacing the hot water heater...are flexible connectors any good, and
if so which are the best?

Corrugated stainless steel connectors are the best, such as these:
http://www.falconstainless.com/

The EPA recommends a "heat trap" for in and out going water; a
flexible connector, basically, with a u-bend. Is this a good idea?

Yes, this is a good idea.

Cheers, Wayne