On behalf of Ata Ciechanowski, Task Group Chair, enclosed is the ballot for Draft 1 of NSF 358-3 issue 1, creation of a new standard Cross-linked Polyethylene (PEX) Pipe and Fittings for Water-Based Ground-source (Geothermal) Heat Pump Systems (358-3i1r1). Please review the proposal and return your ballot by the ballot due date of December 5, 2014 via the online workspace (http://standards.nsf.org).
Purpose
The purpose is to create a new standard for cross-linked polyethylene pipe for geothermal applications. |