Water Treatment ComponentsEqual StraightContact 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-0077 equal straight 1/4 OD x 1/4 OD John Guest (PP0408W) QC-0028 equal straight 3/8 OD x 3/8 OD John Guest (PP0412W) QC-0017 equal straight 1/2 OD x 1/2 OD John Guest (PP0416W) QC-0016 equal straight 1/2 OD x 3/8 OD John Guest (PP201612W) QC-0026 equal straight 3/8 OD x 3/8 OD DM (AUC0606W) QC-0027 equal straight 1/4 OD x 1/4 OD DM (AUC0404-W) QC-0018 equal straight 3/8 OD x 1/4 OD DM (AUC0604-W) QC-0116 equal straight 1/4 OD x 1/4 OD Made in Taiwan QC-0117 equal straight 1/4 OD x 3/8 OD Made in Taiwan QC-0107 equal straight 1/4 OD x 1/4 OD, with check valve DM (ACHV0404) QC-0018 equal straight 3/8 OD x 3/8 OD, with chech valve DM (ACHV0606) ApplicationPrevents leaking. Match tubing to same diameter pipe fittings.