Very low water pressure on gauge on combi-boiler

Rochdale_Guy

Hey, no worries keystone, I appreciate your concern, but relax, I haven't touched / turned a thing!

I know that if I can get hold of the correct loop, I know what to do know:

1. Turn power off.
2. Unscrew "Cap 1" on Pipe D, and "Cap 2" on Pipe E and connect Filling Loop between the bottom of H and the bottom of I.

Turn iso vv at H "1/4 turn so that the slot runs parallel to the pipe" with a flat head screwdriver to let cold mains in to repressurise and close to stop filling. Pressurise to iro 1 bar with system COLD.

3. Turn iso vv "clockwise" when pressure is iro bar 1 and remove Filling Loop from between bottom of H and bottom of I.
4. Rescrew "Cap 1" and "Cap 2" on Pipe D and Pipe E.
5. Switch power back on (and pray!!!!!)



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I take it turning the power knob dial on the boiler to OFF and also the turning the electrical socket switch off on the wall is sufficient? I don't need to turn the water supply off too do I?!

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ian103

at the two brass nuts blanking plugs? from one of the photos its looks like they may be then the filling loop would be required

keystone

Rochdale_Guy wrote: »

Hey, no worries keystone, I appreciate your concern, but relax, I haven't touched / turned a thing!

But you told another poster that the exterior nut on I doesn't turn?????

Just commenting on the fact there was nothing to turn on "Non Return Valve I", as you correctly label it!

OK I misread you - sorry.

I'm just thick and would've benefitted from you saying......"open iso vv at H anti-clockwise with flat head screwdriver", thats all!

Clockwise, anti clockwise doesn't matter. Its a ball valve and you only need to turn it 1/4 turn so that the slot runs parallel to the pipe. Parallel to pipe = fully open, at right angles to pipe = fully closed.

Cheers

keystone

ian103 wrote: »

at the two brass nuts blanking plugs?

No.

Cheers

Oops, me wrong. Actually they probably are looking at the higher definition pic. Sorry..


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keystone

Rochdale_Guy wrote: »

Yes, the loop is attached in the video, but it still looks different from my set-up! :eek:

Probably does. All depends how the plumber plumbed really. Edit: Ok just looked at the vid. Its functionally exactly the same as your setup except the valves are horizontal in the video and in a slightly different location.

Cheers

Rochdale_Guy

Thank you
T H A N K Y O U
T H A N K Y O U !!!!!

I guess thats why I work in an office and not in plumbing or electrics(!!!), I should just leave it to the experts such as your good self, sorry for it taking so long for me to understand! I owe you a pint!
:beer:

So, you bet your life if I get a flex loop (where the heck from? There's only a B&Q near me and their website only lists one ), the steps in Post 32 of mine above are bob on and 100% safe and accurate?!

I don't want drenching or blowing up for Xmas, although my ex would see differently

Don't want to make headline news on Xmas day TV either <KABOOM> :eek: :A

Police are looking for an internet forum user called keystone LOL


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keystone

Well just leave the bloody gas alone then - thats the one with the YELLOW tap on it.

Bon chance.

Cheers

Myser

A couple of things to note:

* When re-filling the system, go slowly as it is easy to over-pressurise. When you have reached the safe zone (indicated by the gauge), the level may continue to rise when you close the valve. This is due to air moving in the system and the water settling.

* The pressure may rise slightly when the central heating is on. This is because water expands when heated. Hence why you shouldn't over-pressurise the system.

Over-pressurising the system isn't necessarily dangerous as most modern boilers have a Pressure Relief Valve (PRV) which dumps excess water if the system pressure exceeds the maximum (indicated on the gauge).

However, repeated activation of the PRV can cause it to eventually fail. So it's best to pressurise to the correct level.

You can probably buy a filling loop much cheaper at any local plumbing hardware store or Screwfix and Toolstation. You may have to buy the whole assembly with valves from B&Q.

Rochdale_Guy

keystone wrote: »

Well just leave the bloody gas alone then - thats the one with the YELLOW tap on it.

Bon chance.

Cheers

I'm not bloody touching Pipe C, the one with the YELLOW tap on it!!!!

Did you re-read Post 32 with my comments about turning the power off twice?

Rochdale_Guy

Would this do, as there's a Screwfix 10 minutes from me, I take it I wouldn't touch that black valve/lever?, £8.99:

http://www.screwfix.com/p/combi-straight-filling-loop/46605

Or this from Toolstation, £7.35:

http://www.toolstation.com/shop/Heating/Central+Heating/Filling+Loop+Straight/d230/sd2708/p35419

Or can I just use a shower flex as suggested in Post 9?


EDIT: There's a Toolstation in the same industrial retail park as Screwfix here in Rochdale, how weird¬!
http://www.toolstation.com/documents/news/index.html?id=132


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