On Thu, 20 Aug 2009 04:18:22 -0700 (PDT), NT
wrote:

When replacing a heater you should have the tank full initially, once
its loose then turn tap on and water supply of to drain it.

But don't they drain from the top? I thought cold water went in the
bottom and hot water came out the top?

Is there a reason that butyl cables are used with immersion heaters? I
know they have to be heat resistant but why not heat resistant PVC? I

no such thing

There's both he
http://www.tlc-direct.co.uk/Main_Ind...ant/index.html