[Page 41] - 4 NGT 3/4 F NPT Yes 19.5 GPM Old style Checkmate Valve Limited available for reference ... Rego 7572/7580 3/4 3/4 M NPT Old Style Checkmate adapter PA5133 Sherwood 3/4 3/4 F NPT ... 4 NGT 1 5/8 -12 ** Yes 22 GPM New Style Checkmate valve PVE5137 Sherwood 1-1/4 NGT 1 5/8 ... Sherwood Adapter for all new style Checkmate adapters 1 5/8 -12 3/4 F NPT Fits all ... can be used with the liquid withdrawal checkmate adapters to control the flow when ...