A reduction valve to allow you to go from 1/2 inch to size of your coil diameter, in my case as I got fittings B&Q Newry 15mm down to 10, but any plumbers merchants has them. Short length of 1/2inch copper and a couple of jubilee clips and a couple of nylon ties to keep it all together.
Hose placed in hot water to be forced over the pipe.
This may seem like an overkill <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="

" title="Very Happy" /><!-- s:D --> , but I run my tap for first couple of minutes at full blast to get the initial boil off and then slow to allow max heat transfer. I don't want any stray water blasting into the wort from that increased pressure of pipe reduction size and a fully open tap.
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