Hi Zizzy,
Unless you know that the pipework is dodgy, ie there is a history ground work fractures in the area or you live in an old house, I always reckon that that this type of insurance is a bit of a con. I'm all for having central heating insurance that covers the rads and central heating pipework with an annual inspection to ensure that you are not goung to be killed by carbon monoxide. but the rest is a bit dubious.
If you are on your own and unable to tackle small problems like washers, an ballcocks then i spose it may be worth it. But for the main part I'd be inclined to save the money in a high interest rainy day pot an spend it when the problem actually happens!!
Graduate of the university of Life - fully paid up member!