Water Treatment ComponentsStem AdaptorContact Us to PurchaseFeatures Push-fit technology, easy to disassembly and assembly. Withstanding pressure and prevention of leakage design. Suitable using in RO drinking system, purifier, water treatment system...etc. Specification Model Type Spec Remark QC-0071 stem adaptor 1/4 NPT x 1/4 STEM OD John Guest (PP050822W) QC-0068 stem adaptor 3/8 NPT x 3/8 STEM OD John Guest (PP051223W) QC-0069 stem adaptor 1/4 NPT x 3/8 STEM OD John Guest (PP051222W) QC-0070 stem adaptor 1/8 NPT x 1/4 STEM OD John Guest (PP050821W) QC-0054 stem adaptor 1/4 NPT x 1/4 STEM OD DM (ASA0404-W) QC-0065 stem adaptor 1/4 NPT x 3/8 STEM OD Made in Taiwan QC-0057 stem adaptor 3/8 NPT x 3/8 STEM OD Made in Taiwan top ApplicationPrevents leaking. Match tubing to same diameter pipe fittings.