1" 850U/860U union o-ring(QTY-10), 622 Lead Free SKU: 905575 $35.00 Login for better price Select Quantity -+ Add to Cart Additional DetailsResourcesManufacturer: Febco Size: 1 Inch Product model: 850 / 850U / LF850 / LF850U, 860 / 860U / LF860 / LF860U Installation and Maintenance Instructions Specification Sheet for 850U Freeze Protection Guide FEBCO MasterSeries® LF850 Maintenance & Repair