... in CISS field, Dongguan Fullcolor office supplies Co, Ltd. develops One Way Check Valve (QC-OWCV) according to the working principle ... ,and bulk ink offered by users This DIY CISS with one way check valve for HP350/351 printhead ink cartridge work ... Printer,HP Photosmart C4200,C4300,C4400,C4500,C5200 All-in-One printer series,HP Officejet J5700 and J6400 All-in ...