Condensation on toilet cistern

[Breesey]

Sorry to butt in Not sure quite how much of the above is serious! But...

Regardless of the thickness of anything, if its surface temp is lower than that of the air surrounding it, and that surrounding air is humid, condensation will form on the cooler surface as soon as the surrounding air is cooled to its dew point by that surface. At this time the moisture in the air will 'drop out' of the air onto the cool surface. The dew point will depend on the moisture content of the air. The higher the humidity the higher the dew point. It is, therefore, inevitable that condensation will form on the cistern, a mirror, the wall tiles, the window etc when you take a shower, unless these surfaces are heated to a temp above the dew point, whatever that may be. Or you have a cold shower!

I may be wrong but it seems that this is what Corgigrouch is saying and what Bamber is disagreeing with.

Or did I miss something?

 

[JohnD]

I don`t mean to rain on your parade but it has nothing to do with any external sources, it has to do with the quality of the W.C. how it was fired & the thickness of the walls ( in the cistern ) etc. The cheaper the bog, the more condensate you`ll get. Sorry.

Bamber, when you've sobered up, can you explain please why you think the quality and price of the WC will alter the amount of condensation on the cistern?

 

[Breesey]

I don`t mean to rain on your parade but it has nothing to do with any external sources, it has to do with the quality of the W.C. how it was fired & the thickness of the walls ( in the cistern ) etc. The cheaper the bog, the more condensate you`ll get. Sorry.

Bamber, when you've sobered up, can you explain please why you think the quality and price of the WC will alter the amount of condensation on the cistern?

It is surely a wind up. No one is that genuinely misinformed, or prepared to appear so. Are they?

 

[Corgigrouch]

Think he was perhaps a little bored last night and sniffed a little too much solvent weld.. but he is a welcome distraction whilst typing quotes

 

[stl]

Many thanks for all the replies - glad it has generated much interest - obviously a common problem.

I have a 100mm vent axia extractor fan installed at height above the toilet, which works with light switch and stays on for a while after light turned off. However, still get dripping condensation on cistern?

Has anyone seen these cistern insulation kits for sale anywhere in uk - think they might be the way forward! Anyone any knowledge of them?

Also, is it normal for a stopcock tap to leak slightly when fully open. I have found this is happening on the incoming supply, but when turned slightly shut, i.e. one turn the leak stops?

 

[JohnD]

is there any possibility it might be leaking? Fill it with a bucket of hot water and see if it stays dry.