leaky pipe under cement floors

karl99

Oil fired central heating. New condenser boiler. There is a leak in the pipes under the cement floors, there is no obvious sign of the leak is there anyway to trace it without digging up the floors?

Carlow52

Are u sure its the CH?

Is this new?

The reason I ask is that the last one of these I did: the problem was driving rain under the front door saddle:)

is it a pressurized system: tell us a bit more please

karl99

boiler is new but pipework is old . the system is pressurised and the drops from 1 bar to 0 in less than ten hours. the first radiator needs to be bleed before the heating can be turned on. the boiler is outside. two plumbers have looked at it and the first plumber flushed the system and put pipe sealer into it the second plumber wants to dig the place up ? newly decorated house cannot afford to have it dug up

Carlow52

:(I had hoped for a bit more detail such as:
type of piping: copper/gb/plastic/microbore....
was it always pressurised
age of original piping
age of house
structure of house: single storey/ 2 storey/....
number of zones on system and what isolataion valves u have fitted on each zone.
whats the piping layout within the house?
Covering on flooring in dry and wet parts of house.
Internal walls: block/stud/?
When did the leak start
is this a new leak since they did the work replacing the boiler
where is the washing machine/how is it plumbed.
etc
etc
In relation to air getting into the system in the first rad I presume u are using the heating for either water and or rads for this to happen.

If not then u have air getting into system as well as the leak because once the pressure gets to 0 without the water being heated u wont get air in the first rad, or any rad

kscobie

pressurise heating to 1 bar, " get" a stetascope (spelt incorrect) , listen to rad pipes, the louder the noise, the closer u are to the leak, dont put off, prolonged leak will cause the boiler to corrode from the inside out