Blending valve? Don't they require a cold water feed as well? (Can you link to a suitable type plz)
Anything requiring additional piping or controls would involve disruptive work, so if my plan fails I'm happy to leave as is and resolve it in the future.
Pump is a Grundfos selectric ups 15-50 with 2 double and 5 single rads.
In the meantime, back to the original Q, whats best way (component wise) to tee off and back into the circuit between 2 rads?
Anything requiring additional piping or controls would involve disruptive work, so if my plan fails I'm happy to leave as is and resolve it in the future.
Pump is a Grundfos selectric ups 15-50 with 2 double and 5 single rads.
In the meantime, back to the original Q, whats best way (component wise) to tee off and back into the circuit between 2 rads?