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Moss is often a symptom of poor drainage or shading - is your lawn shaded by trees, buildings etc? Steve

Tried a virus scan - 5 hours later still only done 14%! Then seemed to get stuck. Strangely enough it seems a bit more like its old self today - the grinding whirr you get from the cpu when something is being processed sounds a bit faster today - it had been intermittent and painfully slow (a...

Don't know how this has happened - have not installed or downloaded anything new but my PC has suddenly slowed down so that opening programs, clicking on tools, closing programs etc takes an age. It's like I'm wading in treacle. Could this be a software or hardware problem? Any help...

Many thanks for that Chris - yes it seems a bit pricey - around £60 from my local 'discount' plumbing outfit. I've just realised that Ive hijacked this converstaion - the original query about the hot water cylinder came from someone else. Come in number 1650772 it was your question! Thanks...

Mine's a very old Camray oil boiler which is on borrowed time and is probably extremely inefficient but kicks out gravity flowing hot water over 7 metres from my boiler room very quickly albeit with plenty of heat loss along the way - surely though, when the two-port valve is switched off (and...

Recently introduced my father to the internet but he is being charged twice for his dialup calls - once by BT -his ISP and once by Virgin his landline account. Both insist it's the other's fault and as it's virtually impossible to communicate with BT unless you are prepared to wait hours to get...

Sorry about the reference - the index checked out with my hard copy and I assumed it was complete. Checkout this webpage for the same wiring diagram www.gasman.fsbusiness.co.uk/images/cpl.gif This is the system I've decided to install alongside my solar to prevent reverse circulation...

Thanks for that Presumably they are seated in position under gravity and are forced open merely by the push of the rising hot water? What are they made of? Cheers Steve Williams

Yes I'm also looking at this option to improve the controllablity of my system and prevent back circulation (see my posting - anti-gravity valves). I've found a good diagram (page 138) of exactly this in a book called 'How to fault find and repair central heating' by K G Nathan - don't go out...

I've recently installed a DIY solar hot water system but am having a problem with losing heat from the hot water cylinder which is reverse- circulating up the primary boiler (28mm) flow pipe. This is a gravity system and I am wondering whether there is such a thing as an anti-gravity valve which...