WATTS WATER TECHNOLOGIES Watts Wa-6 Rebuilding Kit for 288A Backflow Preventor 1/4 In. and 3/8 In. Size-Sx-0019448 Manufacturer: Watts water technologies Manufacturer part Number: 887170 Watts wa-6 rebuilding Kit for 288a backflow prevent or 1/4 in. And 3/8 in. Size - sx-0019448