Alex55
The unit has three pipes the middle one is gas there are one pipe each side of the gas pipe which are water pipes the left one has a non return valve on it where that one connects to the unit has a what could be a outlet device on it (where it drips) the right hand water pipe doesn’t have one and from there a pipe goes up to the heater section on both right and left side of the junkers unit.
I did take a pic which may see hyper link below there are two pics of the where it is dripping and a pic of the Junkers water heater(the url goes to myspace albums/hot water heater)
Note for temp purpose I put a small plastic hose so it will drip in to a container.
I hope the above helps.
Alex
