"Andy Hall" wrote in message
news
On Wed, 10 Dec 2003 13:04:13 +0000 (UTC), "Dan Winchester"
wrote:

Thanks everyone who responded.

I think the problem lies with supply of water from the header tank to the
cyclinder, as suggested by Dave and Richard - either the supply pipe is
scaled up, or it supplies into a layer of scale in the bottom of the tank
above the bottom of the pipe.

I might try some Fernox DS3, although a plumber friend has told me to
avoid
this and replace the tank as DS3 could expose leaks currently sealed with
scale and generally gunk up the system.

Cheers
Dan



I think that he's probably right. By the time you've bought the
chemical and spent quite a lot of time on it, and as the plumber says,
more than likely created other problems, it's going to be quicker and
probably cheaper to replace the cylinder.

If the water is exceptionally hard, you could consider installing an
ion exchange water softener. This will prevent scaling completely,
and you can more than cover the cost of the salt to regenerate it in
the savings in shampoo and detergents, let alone the capital cost of
the water heating equipment..




.andy

To email, substitute .nospam with .gl

Yep, he recommended adding some sort of softener, at least to the cold feed
into the hot water header tank.