IRC P2803.6.1 states that the discharge pipe for a TPR valve “shall be piped full size separately to the floor, to the outside…, or to an indirect waste receptor located inside the building.”
** What is an indirect waste receptor?** I’ve seen that term used elsewhere in the IRC. Please see the attached photo of a TPR valve drain connected in the crawl space to the water heater pan drain line, which discharges outside the house. It this acceptable? Is that an “indirect waste receptor”? Is the crawl space “inside the building”?