Immersion Heater Pump

[monkeymagics]

The story is:

Our immersion heater was spewing water out of the overflow, the plumber came and fixed it by putting in a new one way valve (I think something to do with ensuring that as there isn't a lot of pressure hot water would still come out when we needed it) and a shower mixer in the bathroom as you could hear the cold water running back through the pump (we have a pump as there would be no water pressure without it).

This solved the problem of the water spewing out as it was stopping the cold water pushing its way back into the tank.

Only problem is now the pump runs/turns over every 10seconds or so even though no taps are open. So we have it turned off unless we need lots of hot water. Not very convenient.

Any ideas what the problem is?

thanks

 

[JohnD]

I don't think you have the terminolgy right

this is an immersion heater

this is a hot water cylinder

this is a cold water cistern

this is a shower pump

where is the water coming out?

 

[monkeymagics]

Water was coming out of the overflow from the cold water cystern. It was filling up as water was coming back into the hot water cylinder from the mains (via the shower thermostatic mixer), ie the wrong way. That has been fixed.

Now the pump keeps running, i have now been told that there is a switch in it which was probably broken by all the water flowing back up from the mains into the tank so that is why it keeps running, replace switch and it will stop.

Not sure my terminology is getting any better even with the pictures!