I have a mk6 transit minibus and had to have some welding done and they broke the heater valve where the hoses come into the heater unit, I have now replaced the unit but need to know which of the 2 hoses is the flow and which is the return as they just looped the hoses up and now don't know which one is which.
is there a easy way of telling before re fitting ?
thanks in advance for any help
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