New construction or additions - new construction of 5 dwelling building. exterior installation of curb trap, fai, main drain, and 1 1/2" water distribution pipe. interior installation of drainage, waste, vent, and water supply for listed fixtures. venting to be designed and installed in accordance with section 919 philadelphia single stack vent system. all work to be installed in strict compliance with 2018 ppc and approved plans interior plumbing - 11wc, 11-tubs/shower, 11-lavatories, 5-ks, 5-ls, 5-wh, sewage pump and sump pump exterior plumbing - sanitary and storm curb trap, fai, 1.5" ds