

No it's the photo that's a bit deceptive due to the angle but actually, that's the heating return isolator.The rh black valve is for the filling loop if my eyes don't deceive me,

No they aren't. The left pipe is the flow ,the return is on the right and both have black levers. The centre is gas line and far right prv pipe. The filling loop has a check valve on left and ball o fix on the other end. John D is correct .Disagree herewith flow and return are the two left hand pipes, only one of which has a handle


No problemTeach me to look at the pictures with something bigger than a mobile. Sorry JohnD
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