[ron69912t]

Kevin:
The hose that came with my Gunson Digital CO Meter is just plain old vinyl hose you can buy at the hardware store. I think it's either 1/4" ID or 5/16" ID.

There are two short pieces about 12" long. One goes from the unit to the diaphragm and the other is the moisture drain.

The vinyl hose to the exhaust pipe is about 6-7 feet long and has a 12" piece of 1/4" copper tubing stuck in the end which is what goes up the exhaust pipe about 8". It has a coil spring at the tip to hold the copper tube in the center of the exhaust pipe.

You must use clear vinyl hose on the exhaust hose so you can see through it in case moisture builds up as liquid and blocks off the hose, this does happen when the hot gas cools.

The Gunson web site has the instructions which you can download.

Good luck,
Ron D