"atec 7 7" "atec wrote in message
...
terryc wrote:
On Wed, 23 Sep 2009 18:44:47 +1000, atec 7 7 wrote:


( 2 metres down the earth never gets above 5 Deg C) in Brisbane

How and where did you do the trenching.
The only trencher I can hire is only 3'

used neighbours back hoe then a shovel
bloody hard work and near killed me

How many metres of pipe and what diameter would be necessary for this to be
effective? Or do you have a link that I could explore more?

Mike