Just a quick question...
do I need one?
The system will be a Y-Plan, I've read in a couple of places that since Part L you do need one, I've also read that if you leave one rad without a TRV then you don't need the bypass valve?
Is it best just to fit one for the sake of £25?
do I need one?
The system will be a Y-Plan, I've read in a couple of places that since Part L you do need one, I've also read that if you leave one rad without a TRV then you don't need the bypass valve?
Is it best just to fit one for the sake of £25?
