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as previously said, all installers have their favourites, but in my opinion, for a property of your size, a combi will adequately fulfill your needs.And cost less to install than a new system boiler and cylinder upgrade. With regard to vaillant, yes they are a good product, but when they go...

as ive said, its the expansion vessell, now exchange that or add another one to the return and be done with it. :wink:

u have one of the finest and most reliable boilers of its age. It will far outlive its modern counterparts, and i guarantee it can be repaired and serviced easily. Parts are always available for these boilers, just get a reliable engineer to service and repair it and it will outlive u. :wink:

the answer to this question lies in the square metreage of the property. Any property with a sqm of more than 150 should have a s plan installed for flow rate reasons. Thanks, the master.

backfill, thats the answer.

i definitely think your expansion vessell has gone(this is from experience of working on these boilers), when the boiler changes over to domestic hot water the volume of water in the boiler is less than 2 litres, this is why u get the rapid increase in pressure, (pressure is always related to...

in my experience, u have bought probably the worst ever combi brought out, exchange it for a 105he and youll have no bother. ++++++++++++++++++++++++++++++++++++++++++++++ i definitely think your expansion vessell has gone(this is from experience of working on these boilers), when the boiler...