low pressure

My Vailant two years old with the past time the pressure went down each week now it goes down each hour and reach 0,need your advise.Thanks

You have a leek somewhere in the heating system.

Look closely at all your radiators and piping/valves.

Al

if there is no leaks in the rad valves overground ,what is the best way to find out the leak as all the pipes underground,or its better to put new pipes

check the pressure relief discharge pipe (its should be on the outside wall that the boiler is hung on) see if thats leaking

also when you have topped it up check the pressure guage whilst the boiler is running (does it rise really really quickly)

If the above is happening then you need a new expansion vessel and possibly a new pressure relief valve.

if there is a leak under the floor you can use an infra red thermometer to map out the temperatures on the floor, the heating pipes should show high temps in a small cross section and a leak will show a high temp over a bigger section (this is a really hard way of doing it but it does work)

alternatively you can pay a company like MUNTERS 250 and they will attend your property with thermo imaging cameras, it sounds expensive but not as dear has tearing up the screed on your floors trying to look for a leak.

Cheak all pipe work that you can see, also check all rad valves (i doubt its these as you are losing ALOT of water very very quickly)

If the above does not appeal wait the leak will show itself eventually, but may have caused soem considerable damamge before it pops its nose up

many thanks to your advise.