F&E tank overflowing of a night

[Charnwood]

So I guess we should refer to wwp as a tank.

You can if you wish, but I'll continue to call it a cistern, even if the syphon has been replaced with another type of flushing device.

 

[Madrab]

Even DEFRA call it a tank more than a cistern http://dwi.defra.gov.uk/consumers/advice-leaflets/tanks.pdf
That being said I was taught that it is a CWSC (Cold Water Storage Cistern) but in practice with customers I use cold water storage tank more often than not.

 

[Dan Robinson]

As if DEFRA would know what opening to wipe after a sh|t.

 

[Madrab]

What... do you mean government bodies don't know their ass from their other ass??

 

[Charnwood]

This could go on forever.

CWSC, yes, but FEC? I've see FET as an abreviation, but not FEC.
CWSC and CWST both get used on here, CWSC roughly twice as much as CWST.

 

[Steelmasons]

A 'tank' is a vessel that is full to the brim at all times whereby a 'cistern' is not ie: 'nominal/actual' capacity , a 'cistern' uses a float valve to fill/replenish whereby a 'tank' does not , a 'hot water tank' utilises a 'cistern' or direct water mains to fill/replenish.

Now you may ask yourself "what is the difference between a 'hot water tank' and a 'cistern'? , plenty I would say.

I wonder if Charnwood remembers the old 'Croydon' type ball valves , maybe before his time , do any of your customers ask for a Portsmouth ballvalve nowadays.

 

[Madrab]

Jeeshhh....Forever and a day no doubt ,

As long as a person knows what is being talked about then either are correct IMO and I'm happy sitting on this fence over 'ere

 

[linton1990]

Thanks for all the replys. RE it being a nackered coil, I did think it could be this but then it's not happening all the time. If it was this would it not overflow regularly?

Re it being a mixer tap / mixer shower. I have both but I don't believe the hot is going back up the cold. Atleast I don't think it is, how would I know?

The ball valve in the cistern / TANK is just under water the ball is just under but there doesn't seem to be any water trickling out though. Is this wrong?

The F&E is below the cold water

 

[Madrab]

Is that the Feed and Expansion Tank or cistern lol...only joking.

yes, usually if there were pin holes in the coil then it would overflow regularly but wouldn't be the first time coming across something new. Has anything been changed/altered recently with your system?

 

[linton1990]

That's the fish tank in the loft

There have been no alterations made to the system at all. I have turned the temperature down on the boiler I'm wondering if that will make a difference. The ball valve being just below the surface of the water made me a bit suspicious.

 

[Madrab]

Well water is entering the tank either through water flowing from the Hot water tank into the ch circuit and then up through the feed pipe of the F&E under gravity from the cold storage as it's higher or it is running up over the vent pipe into the f&e.
Try turning the cold supply off to the HW cylinder (usually a red gate valve on the hot water feed pipe near the cylinder) when it's overflowing and see if it stops.

 

[picasso]

A panzer cistern ? no wonder they lost the war

 

[kidgreen61]

So, it's not the coil leaking in your CYLINDER then?

Remember, that cylinder, is neither a tank, nor cistern

 

[gigz]

+1 for coil. The reason its not doing it during the day could be that you're using the hot water so not giving it time to overfill. Isolate the heating header tank, and drain the heating so its lower than the coil, see if it still happens. If it does then go onto mixer taps/shower.

 

[Charnwood]

I wonder if Charnwood remembers the old 'Croydon' type ball valves , maybe before his time , do any of your customers ask for a Portsmouth ballvalve nowadays.

I'd not heard of the Croydon (or the Garston!) until today.

I don't have customers, I'm retired.

Check out page 47.
http://pegleryorkshire.co.uk/MEDIA/...64_Prestex_Valves_and_Fittings_March_2011.pdf
I think you are referring to MOH Portsmouth pattern valves.