fitting new boiler with old pipes in concrete

[secondsight]

hello,

i hope someone could advise please ,

i have a third floor flat with an Old boiler installed.

i want to repalce the boiler for a new Combi-condenser boiler /

all my pipes are currently run in the concrete floor

i have been told by a mate ,
that i should NOT use the old pipes as they wont take the pressure of the new boiler , and leak .

is this true ??? ,

i was thinking of a Bosch worcester 28i boiler...

many thanks

 

[EliteHeat]

They might do. On the other hand, they might not.

 

[heatingman]

your mate must have a crystal ball, 50/50, risky but won't know untill you put it under pressure.

 

[secondsight]

50/50 .hmmm.

thanks for advise

the properrty is over 30 years old , i am guessing the pipes are that old also !

am io still at 50/50 ??

 

[Agile]

If its an old Servowarm installation some of their rads do not take a pressurised system.

Its sometimes possible to install a new boiler on an open vented system but thats normally for a conventional system with a hot water cylinder.

The pipes can be tested at say 2 Bar to see if they leak!

They need to be cleaned very carefully with non acid chemicals.

Tony

 

[doitall]

The minimum boiler pressure before the PRV blows is 3bar, if you can't test the system at that pressure then don't pressurise the system. simple as that.

 

[secondsight]

thats great thanks for your help