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by cookie85
Thu Aug 23, 2007 11:40 am
Forum: Plumbing Forum
Topic: Anti-Gravity Loops Meaning
Replies: 1
Views: 18359

Anti-Gravity Loops Meaning

Can any commercial plumber please help me out and answer the following question for me? What is an anti-gravity loop and what is its purpose? We have a tank fed pressurization unit, with a cold feed to the heating flow header. As the cold feed enters the flow header, the pipework sets up about a foo...
by cookie85
Thu Aug 02, 2007 9:36 am
Forum: Plumbing Forum
Topic: Moving a radiator
Replies: 3
Views: 4330

A plumber would charge you a min call out fee of 50£ and then the cost of labour, possible another 40£. This is a very easy job if you know what you are doing. It is a case of isolating your heating supply or if this isnt possibly draining down your system and extending the p/w to your new locatio...
by cookie85
Thu Aug 02, 2007 9:32 am
Forum: Plumbing Forum
Topic: calculate water pressure?
Replies: 5
Views: 21546

scotty49, A very basic pressure calculation can be done by doing the following. This will calculate the static head available from your cold water storage tank to your outlet. p x g x h p = density of water - 1000 m3/kg g = gravitational constant - 9.81 m/s2 h = head of water available from tank to ...
by cookie85
Wed Aug 01, 2007 7:44 pm
Forum: Plumbing Forum
Topic: Scale buster installation advice
Replies: 1
Views: 4113

Scale buster installation advice

Hi, I've just recently bought a domestic 20mm Scale buster from the Rodin Group, which will hopefully help to solve the scale problem in my house. Theres no flanged ends, just a 20mm diameter opening. In the installation instructions it states the 'BSP connection size is 3/4 inch female', and compre...
by cookie85
Tue Jun 19, 2007 7:59 pm
Forum: Electrics Forum
Topic: Fused Spurs & Sockets
Replies: 3
Views: 16335

Sorry about my terminology, i am from a mechanical background. So can i just clarify a few points: (I meant from a socket not a junction box) From point 1: So directly from a ring main you can only spur off to one double or single socket. This will be wired with a 3 core flex cable, from the ring ma...
by cookie85
Tue Jun 19, 2007 1:47 pm
Forum: Electrics Forum
Topic: Fused Spurs & Sockets
Replies: 3
Views: 16335

Fused Spurs & Sockets

Hi, Everywhere i look i seem to read a different answer, can somebody please tell me how many fused spurs can you run of a typical 30 amp ringmain? Is it 2?, or as long as you fuse them with a 13amp fuse you can run up to 3 or 4? Also the number of additional sockets you can add to a ring main from ...
by cookie85
Tue Jun 19, 2007 12:53 pm
Forum: Plumbing Forum
Topic: Identifying vented and unvented systems
Replies: 6
Views: 4824

You have a strange system here. Tanks that are possibly redundant and a combi which supplies your hot water cylinder. The idea of a combi is to provide you with hot water instantaneously, whilst also satisfying your heating load. I cannot see why this type of boiler would be supplying LTHW to your c...
by cookie85
Mon Jun 18, 2007 9:28 pm
Forum: Plumbing Forum
Topic: Identifying vented and unvented systems
Replies: 6
Views: 4824

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by cookie85
Mon Jun 18, 2007 9:27 pm
Forum: Plumbing Forum
Topic: Identifying vented and unvented systems
Replies: 6
Views: 4824

whyleric, Yes this is fine, make sure you isolated all incoming supply pipes and drain down as per usual. The type of system you have depends on whether your boiler has its own expansion vessel or do you have F&E and cold water storage tanks in your loaf? Do you have a combination boiler? Or a c...
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