[johnkosir]

If you have the 4 hoses disconnected you can use air to figure out the pairs, on 712 it was easy to figure out what houses were engine heat the aqua hot returns went to a common manifold, if you pinch one of the engine heat hoses off at the aqua hot you will know what 2 hoses are for aqua hot, also 712 does not use engine anti freeze for the aqua hot so the liquids are different colours