Does the 105 series poly tubing have NSF-61 certification?

No, the 105 series poly tubing does not have any NSF certifications. The tubing is made from natural FDA grade LLDPE (linear low-density polyethylene). The material complies with FDA regulations in the Code of Federal Regulations (CFR) Title 21, section 177.1520 paragraph C, section 3.1a.

Additional Resources:

https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm?fr=177.1520