Product Info Catalog Plumbing Plumbing Accessories Toilet Repair Reducing Adapter, Female, 1/2 x 3/8-In. Reducing Adapter, Female, 1/2 x 3/8-In. Request a Quote UPC: 52151223531 SKU: 666006 Model Number: 10-0013 1/2" Iron Pipe Size Supply Line x 3/8"" Female Compression Thread, Reducing Adapter, Carded.