Hi
I posted a question on here earlier, however, i failed to mention a couple of points, there r 2 overflow pipes sticking out the wall, and the only items that hold water are the toilet cistern, and the immersion heater, there is no tank on the loft ( have warm air heating), so i assume that 1 pipe is for the cistern, and 1 for the immersion........would this be correct??? and it is the pipe furthest from the cistern that is dripping....any help would be appreciated.
Thanks

Heidi, September 2009

Then it's a mystery...

The hot water storage tank - the one with the immersion heater - will be getting it's replacement water from somewhere and there will need to be some form of control on the flow into it. Either there's a tank in the loft or, there will be a lid on the hot water tank in the airing cupboard. This is most unusual but as a child in the 1950s there was a similar arrangement in my bedroom!

Have you checked the toilet cisterns? Have you run the hot tap for a few minutes? Did the overflow stop? Might the overflow be coming from an adjoining property?

Look at you hot water tank - does it have a lid? Is there a fat pipe low down on the bottom rim of the tank running up to the ceiling? If so, this may be the feed from the header tank above.

You have exhausted my ability to offer any more suggestions - my apologies.

Continuing good luck...

P, September 2009

But i have no header tank............there is no water tank in the loft......

H, September 2009

I answered this already - if you have a hot water cylinder it will very probably be fed from a tank in the loft - hot water cylinders are usually sealed and obtain their water from an upper tank - with a ball valve and an overflow. If you have warm air central heating then you will obviously have no header-tank for the radiators.

Have you looked in the loft or in the toilet cisterns yet? Best to start with the toilet cisterns because they're easier to check.

When you eliminate the toilet cistern(s) then take a look at your hot water tank - if it doesn't have a lid (which it very probably will not have) then it's a loft job.

You might also consider running the hot tap continuously for five mins or so - if the overlow drip stops then you have a diagnosis...

P, September 2009