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Thanks Ian - your formula confirms what someone else told me but the radius would be 0.0011 on a 22mm pipe.

I pulled up my old hearth and it took about 1 inch deep of concrete floor with it. I need to lay a new marble hearth - the question is do I fill and level the hole left by the old hearth and once it has set then lay the new hearth , or can I fill the old hole and set the new heath into the...

:?: I'm trying to size an expansion vessel for an unvented cylinder and I need to work out the total water volume of my CH system. I have got the calculations for most parts of the system but can't find anything on how to calculate the water volume of the pipes. Can you help out? I need...

Guys - answer honestly: - If you were to quote for two identical jobs (if there is such a thing) and customer 1 lived in a 500K house in a nice area and customer 2 lived 100K house is a less desirable part of town would you charge them both the same price for the job?

First off I'm not a plumber - but I would of though that as well as learning the practical side of plumbing theres the theoretical. Practicing joining pipes at home won't help you learn the correct plumbing procedures. ie correct pipe sizes , regulations etc.

Yep - only a few miles down the road. I've found his number - I'll give him a call. Thanks.

Horsham - West Sussex.

The system that the engineer designed didn't conform to the latest building regs. I only found this out by asking questions on this forum. Plenty of friends can recommended plumbers but I haven't found one with an unvented cert. I'm in the process of ring around local plumbers that are...

I've received some bad advice recently from a so call "professional" and am hoping you guys can get be back on the right track. Can any of you recommend a boiler and maybe cylinder that suits my needs , details as follows: Rads already sized to 16KW 5 bed house 1 main bathroom with bath ...

Ped and blah - Many thanks , you were spot on with your advice. Its all in black and white here: http://www.heatingcontrols.org.uk/Site/downloads/TACMAGuide.pdf and here: http://www.heatingcontrols.org.uk/Site/downloads/GPG302.pdf I wish I'd know about this forum earlier. On the...

Thanks PED....... I was only asking the council guy about the room stat as you hadn't mentioned the boiler interlock originally. As you can tell I am out of my depth on this subject thats why I seek advice of suitably qualified tradesman. Is there anywhere online that has the Part L...

I've just checked out the Part L building regs situation with my local council and was advised a room stat is not needed to comply with the regs - as the zoned control is being taken care of by the TRV's. A timer device is required - which I will have. The guy did read me out the actual...

Thanks for the reply - in terms of qualifications he has "Tech (CEI) LCIBSE" after his name - but I've no idea what these mean!!! I have checked with a few others and they also say a room stat is not needed if using trv's. I am aware that at least one rad should not have a trv and he has this...

I can answer some of your questions. £2200 excludes fitting The "duet" comes prebuilt - boiler on top of cylinder. You can buy the boiler and cylinder as separate units and have it installed side by side if you preferred. The cost of buying the equipment would be less but you may incur most...

Thanks for the reply - I think Keston have changed the controls now - I spoke to them yesterday and was advised the control was an ACL 7 day 2 channel.

I have had a central heating system designed by a qualified heating engineer and he has recommended TRV's on all rads apart from the bathrooms, and advised I do not need a room stat. This seems to contridict comments made on this site. ie a "Room Stat is need to control the boiler" etc ...

I'm getting a new central heating system installed from scratch any my heating engineer has recommended the Keston Duet (condensing boiler and unvented cylinder: Details here: http://www.keston.co.uk/products/duet.htm Do any of you guys have any experiance of these - and are they worth...

toasty , so if using freeview should I be using satellite cable between the freeview box and the amp/booster? Also if I want another connection between the amp/booster and tv (but not freeview) should I also use satellite cable for better picture quality?

I beg to differ - there are other publications available that quote the latest standards and regs - the one I had read just didn't give me enough info various hole sizes. You will say I read the wrong book - which may be the case. Now I know about the OSG I will read it. I'm sure your...

Thanks - I'll read the book and forget about using the forum :wink: