The International Association of Plumbing and Mechanical Officials (IAPMO), developer of the Uniform Solar, Hydronics and Geothermal Code (USHGC) and Uniform Swimming Pool, Spa and Hot Tub Code (USPSHTC), has posted online the 2020 Report on Comments (ROC) for the 2021 editions of … Continue reading Download Available: Report on comments toward development of 2021 USHGC and USPSHTC codes