AWWA C504 npauj npaim valve muaj ob daim ntawv, midline kab mos foob thiab ob chav eccentric mos foob, feem ntau, tus nqi ntawm midline mos foob yuav pheej yig dua ob npaug eccentric, ntawm chav kawm, qhov no feem ntau ua raws li cov neeg siv khoom xav tau. Feem ntau qhov ua haujlwm siab rau AWWA C504 yog 125psi, 150psi, 250psi, flange kev twb kev txuas siab tus nqi yog CL125, CL150, CL250.