Leak on pressurised heating system!!!

[jtsplumbing]

Looking at photo the right hand looks like cold water main in and hot water out / the one on bottom left is from boiler, but floor looks dry, some joints need sorting out but do not think this is were you are looseing pressure, if you are sure that their are no leaks on boiler, the floor looks dry around tank, then you must have a leak on heating system.
You say that you have spoken to another Plumber (Hope he is GSR) But has he look`d at boiler to confirm that it is no at fault ??

 

[peteheat]

Hi,

Looks like the joints outlined did weep, as the marks are now white on the one I could see they have probably sealed themselves (not unusual especially in solid fuel with F/E tank) I agree the floor should be wet even from 1/2 litre of water constantly dripping on it.

Having ruled out the boiler, valves and all visible pipe work how about asking your plumber to disconnect the coil in the cylinder and do a pressure test on it?

They have been known to leak and as you have been constantly topping up the heating system the water is most likely clear and there is no Fernox (or similar) left to taint the water in the cylinder.

 

[cr0ft]

When you isolate the boiler from the system using the quarter turn valves on the flow and return pipework what pressure drop do you get if you isolate it while you are at work all day?

If you are getting continued pressure drops past the 0.2 bar mark then your leak is in the boiler. I would say even 0.2 bars if you are isolating it when the system is cold is pointing to the boiler.

 

[ct8282]

When you isolate the boiler from the system using the quarter turn valves on the flow and return pipework what pressure drop do you get if you isolate it while you are at work all day?

If you are getting continued pressure drops past the 0.2 bar mark then your leak is in the boiler. I would say even 0.2 bars if you are isolating it when the system is cold is pointing to the boiler.

Would there not be visible signs of water under the boiler if this were the case? Surely that water has to go somewhere?