A the pneumatic multi-way connector has a cycling motor (l) and a cyclingvalve (2) for cycling pressure air froma non-shown pump to selected ducts (31, 32, 33, 34) in an outlet socket (3).The ducts are complementary to inlet ducts (41, 42,43, 44) of an inlet plug (5). A ring cover encloses a rigid ring (16) whichhas a button (17) exposed at a top portion cover. Aspring (18) biases the ring and the button upwards. The ring cover and thering have a central opening (19) for receiving the disc(52) and the nose (55) of the cover (50) with the slots (56,57) aligned withthe tabs (12,15). The plug is located radially around aperipheral engagement region (20) of the opening (19). The disc (52) has anupper latch lug (58), which engages behind a rib (59)integral with the plate (14). This is at the top of the peripheral engagementregion (20). At the bottom of the zone, the disc has alower latch lug (60), provided in two parts separated by the slot (56). Thisengages behind the bottom sector (61) of the ring (16).The ducts (31-34) are provided in a resilient member (35) captivated betweenthe outlet plate (14) and a stator moulding (36)forming part of the cycling valve, which does not form part of the presentinvention and will not be further described save that ithas a rotor (37) on the side of the stator remote from the resilient member.The bores terminate at the tubes (38) having deformablenoses (39). These abut the disc (52) and form a seal therewith. Release of theplug, by depression of the button (17),allows the tubes and noses to recover, pushing the plug out to a positionwhence it falls down, this being the intention in the eventof an emergency calling for disconnection and deflation of the mattress.