Upon looking at the stock MM Doser tubing, it appears to be slightly larger than the IV tubing I found. I have looked at a supplier and they list a 4mm (5/32") and a 4.8mm (3/16") diameter (OD) tubing that seem to match up with the IV and stock tubing respectively. I believe it is the 3/16" size tubing that is required in case anyone is looking for an alternative source. There are also options in material (silicone vs Teflon) of which may influence success, but I have no idea the answer on that one.
Dan
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