Ivalve yebhabhathane ye-AWWA C504 ineendlela ezimbini, umgca ophakathi wetywina elithambileyo kunye netywina elithambileyo eliphindwe kabini, ngokuqhelekileyo, ixabiso letywina elithambileyo eliphakathi liya kuba liphantsi kune-eccentric ephindwe kabini, ngokuqinisekileyo, oku kwenziwa ngokubanzi ngokweemfuno zabathengi.Ngokuqhelekileyo uxinzelelo olusebenzayo lwe-AWWA C504 yi-125psi, i-150psi, i-250psi, izinga loxinzelelo lwe-flange yi-CL125, CL150, CL250.