PVC transparent backwater valve
transparten pvc the max clean patent,makes a valve appear crystal clean blue color,which make it very easy to check for the function and fouling as well! plastic design, resistant to acid and alkali ...
read moretransparten pvc the max clean patent,makes a valve appear crystal clean blue color,which make it very easy to check for the function and fouling as well! plastic design, resistant to acid and alkali ...
read more