A seal housing with fluid regulating capability for use with an outlet, the seal housing comprising: a seal element comprising an angled flange that is fittable to the outlet and a seal element body from which the angled flange extends, the seal element body defining a bore extending between opposite open ends of the body and receptive of fluid from the outlet; a fitting configured to tightly engage with the outlet and to urge the angled flange against the outlet with increasing pressure as fitting-outlet engagement proceeds; and a valve entirely constrained within the bore and configured to regulate a flow of the fluid, which is received from the outlet, through the bore, wherein: the valve comprises a valve body affixed to an interior facing surface of the seal element body and comprising a valve seat, the valve further comprising a piston which is anchored to the valve body and elastically biased toward the valve seat, and an entirety of the valve body and an entirety of the piston are each constrained within the bore; and characterized in that the seal element body comprises: an aft end which is insertible into the outlet; a forward end; and a central portion interposed between the aft and forward ends (220, 221) and from which the angled flange extends about the aft end. a seal element comprising an angled flange that is fittable to the outlet and a seal element body from which the angled flange extends, the seal element body defining a bore extending between opposite open ends of the body and receptive of fluid from the outlet; a fitting configured to tightly engage with the outlet and to urge the angled flange against the outlet with increasing pressure as fitting-outlet engagement proceeds; and a valve entirely constrained within the bore and configured to regulate a flow of the fluid, which is received from the outlet, through the bore, wherein: the valve comprises a valve body affixed to an interior facing surface of the seal element body and comprising a valve seat, the valve further comprising a piston which is anchored to the valve body and elastically biased toward the valve seat, and an entirety of the valve body and an entirety of the piston are each constrained within the bore; and characterized in that the seal element body comprises: an aft end which is insertible into the outlet; a forward end; and a central portion interposed between the aft and forward ends (220, 221) and from which the angled flange extends about the aft end. the valve comprises a valve body affixed to an interior facing surface of the seal element body and comprising a valve seat, the valve further comprising a piston which is anchored to the valve body and elastically biased toward the valve seat, and an entirety of the valve body and an entirety of the piston are each constrained within the bore; and characterized in that the seal element body comprises: an aft end which is insertible into the outlet; a forward end; and a central portion interposed between the aft and forward ends (220, 221) and from which the angled flange extends about the aft end. an aft end which is insertible into the outlet; a forward end; and a central portion interposed between the aft and forward ends (220, 221) and from which the angled flange extends about the aft end.