Fresh Water Inlet; B&B Molders; Used For RV Fresh Water System; Gravity Hatch Without Door; Use With Either 1-1/4 Inch Or 1-3/8 Inch Water Fill Hose; 3-3/4 Inch Height x 6 Inch Width Cutout Dimension; 5-5/16 Inch Height x 7-9/16 Inch Width Outside Dimension x 2-1/2 Inch Depth; Plastic Check Valve With 1/2 Inch Male Pipe Thread (MPT); Polar White; UV And Impact Resistant; IAPMO/ NSF/ CSA/ TEI Certified; With 3/8 Inch Tank Vent Connection