Water Treatment ComponentsStem ElbowContact Us to PurchaseFeatures Push-fit technology, for easy assembly and disassembly. Withstands pressure and prevents of leakage. Suitable for use in RO drinking systems, purifiers, water treatment systems...etc. Specification QC-0075 stem elbow 1/4 OD x 1/4 STEM OD) John Guest (PP220808W) QC-0040 stem elbow 1/4 OD x 3/8 STEM OD John Guest (PP221208W) QC-0038 stem elbow 1/2 OD x 1/2 STEM OD John Guest (PP221616W) QC-0039 stem elbow 3/8 OD x 3/8 STEM OD John Guest (PP221212W) QC-0037 stem elbow 1/4 OD x 1/4 STEM OD DM (ATEU0404W) QC-0094 stem elbow 1/4 OD x 3/8 STEM OD DM (ATEU0406W) QC-0123 stem elbow 1/4 OD x 1/4 STEM OD Made in Taiwan QC-0124 stem elbow/td> 3/8 OD x 3/8 STEM OD Made in Taiwan ApplicationPrevents leaking. Match tubing to same diameter pipe fittings.