sidewalls 64 thus formed faceplate 63 assembled with door 50 may be attached by screws 88 to face 120 of body flange 44 with a soft gasket 55 interposed therebetween gasket 55 is sized and shaped in conformity to flange face 120 having bolt holes 58 at aligned positions with bolt holes 68 of faceplate 63 and bores 78 of flange face 120 gasket 55 also has a larger opening 59 formed at its lower side to expose u recess 47 so that rear flange 62 and sidewalls 66 of faceplate 63 may pass openings 51 in gasket 55 conform to notches 70 of flange face 120 for letting pivot arms 52 to penetrate turning now to the front view of fig4 the door 50 faceplate 63 assembly is generally centrally positioned in front of main body flange 4 door 50 lies flush with faceplate 63 within wide opening 15 with a slight clearance therebetween depending freely from hinge arms 69 of faceplate 63 door 50 is prevented from being pushed in by two stops 265 described above to keep off unwelcome creatures however whenever water drops through pipes 30 and 31 door 50 opens in response to the amount of water to open to just a degree as necessary for the draining purpose the fall of slanted flange 61 is obvious in this drawing the structure of drain receiver 10 of the present invention will be better understood with reference to fig5 wherein pipe 30 is held in pipe sleeve 41 which extends upwardly of receiver body 40 leaving a top opening 48 in the center of sleeve 41 the penetration of pipe 30 may be limited by having sleeve 41 converge at a lower bevel 46 that merges into.