CWSC in loft - advice

[desrob]

Oh, golly!!

Now I'm becoming confused!!!

In my house (and loads of others I go to) there are two cisterns in the loft. The main cwsc and the F&E cistern. Many times there is a feed from the cwcs to the f&E. This is a right pain when the F&E ball valve needs changing and does not have an isolation or gate valve because you have to drain the cwsc first.

wow...!

 

[PlumbBobBob]

with this thread in mind im wondering if we should have a few line diagrams as a sticky showing the three or four basic systems of heating , hot and cold water supply
maybe with a heading inviting posters to identifiy which system they have before posting

good idea steve

 

[REDSAW]

english please, me and steve dont know what ur on a but?.

 

[rocketmanbkk]

yeah, sorry chaps, my second question about draining and refillinmg was not linked to the job I viewed, it was just another question. I understand the systems and where pipes go etc.

But just to re-ask, if you want to drain the tank, is it better/easier to turn off stopcock/tas downstairs and open taps or drain from tank (or both) and to the 2nd part, would you go to the loft to make sure the FOV is working?

Sorry, maybe I confused things.

Also, gassafeinstall, I am not far from you in Slough area, if you ever need a free Saturday helper now and then I could be your man.

 

[rocketmanbkk]

maybe easier to ask how each person would drain a system both the storage tank and heating system.

 

[SafeGasInstall]

Could do next year ! Just keep in touch !

 

[rocketmanbkk]

Cheers, I will do, experience is golden and being 41yo I can make tea!

 

[samh]

Oh, golly!!

Now I'm becoming confused!!!

In my house (and loads of others I go to) there are two cisterns in the loft. The main cwsc and the F&E cistern. Many times there is a feed from the cwcs to the f&E. This is a right pain when the F&E ball valve needs changing and does not have an isolation or gate valve because you have to drain the cwsc first.

I've never seen that. How does it work, cause you normally have inhibitor in the F&E so surely thats a risk of contamination? Unless theres a double check valve on the feed from CWSC to F&E?

 

[stokecity]

I've never seen that. How does it work, cause you normally have inhibitor in the F&E so surely thats a risk of contamination? Unless theres a double check valve on the feed from CWSC to F&E?

ive never seen this either?? F&E should be fed off main, FOV (float operated valve) wow thats technical, i thought it was a ball cock and a isolation valve a ball-o-fix, what will they think of next??

 

[dontknowitall]

Oh 'eck! My brain's well trollied now.

I suppose there is a risk but then the ball valve in the F&E has the gap to prevent back flow.

I didn't do the plumbing I'll hasten to add!

 

[dontknowitall]

ive never seen this either?? F&E should be fed off main, FOV (float operated valve) wow thats technical, i thought it was a ball cock and a isolation valve a ball-o-fix, what will they think of next??

Ah!!

Maybe that's it cos I've a float operated valve as well - from a private, pumped water supply. Loads of houses around here have these. Float valve on the cwsc and ball valve on the F&E which is fed from the cwsc.

 

[samh]

Oh 'eck! My brain's well trollied now.

I suppose there is a risk but then the ball valve in the F&E has the gap to prevent back flow.

I didn't do the plumbing I'll hasten to add!

O I thought you mean there was an outlet from the CWSC in to the F&E as the inlet for it, my mistake.

 

[dontknowitall]

O I thought you mean there was an outlet from the CWSC in to the F&E as the inlet for it, my mistake.

You're not mistaken as that was what I was implying and I think that's how it's plumbed in - rightly or wrongly!

 

[jase158]

I take it the cwsc is above the f & e?
which would be fine. never seen it though.
I wonder if it takes longer to fill system?
Yes OP, you turn off the mains or isolation valve before cwsc and then open any hot taps or cold bathroom taps, this will drain the tank. this will also remove the top of the hot water.
As before check the float valve to ensure valve is off as if not off you could spend hours waiting for water to stop.
to drain central heating, you do the same but with f and e tank and connect hose pipe to radiator and drain down.
if hot then there is (usually) a drain valve under cylinder.

If combi boiler, turn off boiler, turn off water mains, open all taps and they should run dry after few seconds

 

[samh]

Oh. Should that not be reported then? Unless it isn't the F&E its linked to and actually a way of expanding the CWSC?

 

[jase158]

Oh. Should that not be reported then? Unless it isn't the F&E its linked to and actually a way of expanding the CWSC?

Why would he report himself and to who?

 

[dontknowitall]

And (stupidly in my opinion) the water regs don't apply to private water supplies.

 

[tamz]

DKIA it has been piped like that in someone's wisdom because it is off a pumped supply which may be (or may have been at one time) unreliable or intermittent. It is not a normal way of doing it.

To the op. Try to drop the collage speak like FOV. Its a ballcock.

maybe easier to ask how each person would drain a system both the storage tank and heating system.

Storage tank - look out the back to see if there is a washing out, turn the water off and pull the standing waste. Completely empty in 30 seconds.
Heating - open the pet cock or sludge cock, it drains outside.
This is how things are done up this way :lol:

 

[tamz]

Cheers, I will do, experience is golden and being 41yo I can make tea!

If Stan needs you he has no time to drink tea........and neither will you have.

 

[PlumbBobBob]

To the op. Try to drop the collage speak like FOV. Its a ballcock.


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