Bill,

There must be there a way of balancing/ equalizing the pressures and flow through

parallel radiators with the use of regulators or some such auto or pre-set resistors or balance tubes etc.

George (down under)

Unless there is a built in flow path problem, the loss of heat raises the viscosity of the fluid and slows its flow rate, then the resistance goes up and the other cooler flows better for a while, and the outcome is reversed. No other equipment is required.

 

Lynn E. Hanover