Any plumbers out there?

[peanut]

No do not compress the hose's it will ruin them. That looks like a standard 1/2 BSP drain cock to me it should be ribbed not threaded. Turn your hose pipe round and use the end without connectors it should be a tight push fit if its to tight don't forget you can warm it with boiling water to push it on.

Colin

Ok...muppet here....didn't think of taking the connectors off!!

Anyway....as water is now draining....but at a trickle.....how much should I turn the drain cock....worried if i turn it anymore it will fall out!

[peanut]

The hot water hasn't even got to the back door yet.....think this may take sometime!

[Potstubsdustbins]

It will take some time as there is no airway into the boiler to allow the water to flow freely.That type of drain cock you have can be wound out until it stops just make sure the large round screw jobbie around the centre pin does not come unscrewed as you turn the centre pin.

Colin

[peanut]

It's trickling very very slowly....not sure if i've opened the drain cock enough....but don't want it to fall out!

The water is clear so far.

[peanut]

And now we wait...(twiddles fingers impatiently!)

[Potstubsdustbins]

Can you open the drain any further as I say its what we call a glanded cock. Therefore as long as the gland nut (the larger nut around the centre spindle is tight you cannot wind it out to far.

Colin

[Potstubsdustbins]

I have to go now but I will be on later, take your time we have lots of it.

Colin

[peanut]

Crisis!!!

I've got the vessel out but cannot undo the big nut on top of the vessel, whichever way I turn it it seems to lock and won't move.....I've even got my neighbour here who can't get it to budge and he's a bloke!!

Help!!!

[Potstubsdustbins]

I am back take a pic of the nut assembly and post. No crisis honest

Colin

[peanut]

Crisis over....all reassembled.

Just need to get it working again now....

I've reconnected the new expansion vessel, re attached the hoses.

What's next?

[peanut]

Is it a case of:

1. Switching on at mains
2. Opening isolation valves
3. Topping up system to 1 bar

[Potstubsdustbins]

Great work do not turn on the electric till last. Next as you worked out for yourself pressure up slowly to 1 bar, if everything is water tight go up to 11/2 bar. then open the valve to the heating system.

Then let me know

Colin

[peanut]

I don't understand what's happening. I'm using the filling loop to top up the pressure to 1 bar as usual, i can hear water but as soon as I turn the filling valve off the pressure instantly drops back to 0 bar.

Help!

[peanut]

If it's a case of it will do it but slowly....roughly how long should it take?

I'm waiting for a disaster and very nervous!!

[Potstubsdustbins]

If there was going to be a disaster it would show where you are.

What I think is happening is that now you have a new expansion vessel fitted the dry side is taking up the pressure as it should. Where as before the pressure would rise almost instantly as there was no air volume to take up the excess.

Nip out side and make sure nothing is coming from the blow off pipe and then carry on filling.

Colin