AWWA C504 malam buɗe ido yana da nau'i biyu, hatimi mai laushi na tsakiyar layi da hatimi mai laushi biyu, yawanci, farashin midline taushi hatimi zai zama mai rahusa fiye da eccentric biyu, ba shakka, ana yin wannan gabaɗaya bisa ga bukatun abokan ciniki.Yawancin aiki matsa lamba ga AWWA C504 ne 125psi, 150psi, 250psi, flange dangane matsa lamba kudi ne CL125,CL150,CL250.