what i find odd is that I only live in a small 3 bed chalet bungalow (hardly a hotel or large hose where these dead legs are likely to be found) .
"Servotech,
There can be long runs even in a small property"
The cylinder is situated in an airing cupboard which is in the bathroom which is directly above the kitchen , so its all pretty close.
Also the suggestion on that link is that secondary circuits are best suited to unvented systems not vented ones because in the latter air can get in and so lead to corrosion.
"Servotech,
Ignore what they say because they are trying to sell one of their systems LOL The link I posted was just for reference to help me explain a secondary circuit"
Maybe If I stuck with a vented system I should just have a pump fitted for the HW only. Or were you referirng to an unvented system anyway?
"Servotech
I wouldn't fit a pump on the h/w I can't see anything to gain by it.
I was still keeping things vented/saving you some cash and offering a simple solution to the long draw off time for the hot water at the kitchen".
Installing a simple secondary circuit does sound like an ideal solution to me.[/quote]
I will put your suggestion to our HE and see what he says but it does seem to make sense,Unvented system seems a rather expensive option and apart from utilising mains water pressure and no header tank,I can see the advantage
EDIT - Just read somewhere that whilst the primary circuit is the water that goes from boiler to cylinder and secondary from cylinder to the taps.Are you suggesting I should replace the current secondary circuit i order to get rid of any dead legs that might be in the system and have it all nice and tidy? Thanks