Tygon? Never heard of the material. I wonder what the base material was? Because its clearly a custom polymer which has been trademarked.Here they have the 11/8mm, black or transparent. I suggest the Tygon brand.
11/8mm Tubing for Liquid Cooli… order online | CASEKING
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Says its chemical restisive so maybe its perfectly safe against leaching?
Other options are.
- silicon.
- EDPM. Which is what the EK zmt stuff is. Automotive heater hose and fuel line is made from it. So sourcing the correct diameters should be simple.