Section SPS 322.44 - Pipe insulation(1) Mechanical system piping capable of carrying fluids above 105°F (41°C) or below 55°F (13°C) shall be insulated to a minimum of R-3.(2) All circulating service hot water piping shall be insulated to at least R-2. Circulating hot water systems shall include an automatic or readily accessible manual switch that can turn off the hotwater circulating pump when the system is not in use.(3) Heating pipes in unheated spaces shall be insulated with material providing a minimum thermal resistance of R-4 as measured on a flat surface in accordance with ASTM standard C 335 at a mean temperature of 75°F.Wis. Admin. Code Department of Safety and Professional Services SPS 322.44
CR 08-043: cr. Register March 2009 No. 639, eff. 4-1-09.Amended by, CR 15-041: renum. 322.44 to 322.44 (3), cr. (1), (2) Register December 2015 No. 720, eff.1/1/2016