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Brine/Anti freeze needing replaced in GSHP
by CL at 2013-01-24 18:02:47 (Ask an Expert)
Hi All,

Does anyone know how often we need to replace the antifreeze liquid in our ground source heat loops, also does it all need to be replaced or can it be topped up by adding some new and replacing some old.

I am getting mine serviced and the engineer said they will test the antifreeze and replace if necessary at 150 litres in the system this could work out to be quite expensive, does any one have any experience of this.