A valve assembly for use with a balloon device 100 having a fluid port 130, the valve assembly comprising: a jacket member 210 having an outer surface and an interior channel; a wall anchor 310 configured to be positioned adjacent to the fluid port 130, the wall anchor 310 having an interior passage that receives the jacket member 210 to secure a portion of the balloon device 100 therebetween; a conduit 110 extending through the interior channel of the jacket member 210, the conduit 110 having a fill end 110B and a balloon end 110A, with a fill opening 130 located therebetween, wherein the balloon end 110A is occluded such that fluid 1000 can pass between the fill end 110B and the fill opening 130 wherein a portion of the conduit 110 and the interior channel are sized to create a sliding resistance therebetween; the conduit 110 having an interference region between the fill opening 130 and the balloon end 110A, such that when the conduit 110 moves within the interior channel to position the interference region into the interior channel the interference region becomes secured therein and seals the valve assembly by moving the fill opening 130 through or out of the interior channel; and characterised in that it furthers comprises a weakened section 150 located between the fill end 110B of the conduit 110 and the interference region, wherein the weakened section 150 has a reduced tensile strength less than a tensile strength of the conduit 110 while permitting sliding of the conduit 110 relative to the interior channel upon application of a pulling force on the conduit 110 without causing separation at the weakened section 150, wherein the reduced tensile strength requires a tearing force to cause separation of the conduit 110 at the weakened section 150; a fill opening 130 located on the conduit 110 between the fill end 110B and the interference region, the fill opening 130 positioned within the balloon device 100 such that fluid 1000 entering the fill end 110B exits at the fill opening 130 into the balloon device 100, where the balloon end 110A is occluded to prevent fluid 1000 from flowing therethrough, such that application of the pulling force that overcomes sliding resistance causes movement the fill opening 130 and the interference region into the jacket member 210 to seal the balloon device 100. a jacket member 210 having an outer surface and an interior channel; a wall anchor 310 configured to be positioned adjacent to the fluid port 130, the wall anchor 310 having an interior passage that receives the jacket member 210 to secure a portion of the balloon device 100 therebetween; a conduit 110 extending through the interior channel of the jacket member 210, the conduit 110 having a fill end 110B and a balloon end 110A, with a fill opening 130 located therebetween, wherein the balloon end 110A is occluded such that fluid 1000 can pass between the fill end 110B and the fill opening 130 wherein a portion of the conduit 110 and the interior channel are sized to create a sliding resistance therebetween; the conduit 110 having an interference region between the fill opening 130 and the balloon end 110A, such that when the conduit 110 moves within the interior channel to position the interference region into the interior channel the interference region becomes secured therein and seals the valve assembly by moving the fill opening 130 through or out of the interior channel; and characterised in that it furthers comprises a weakened section 150 located between the fill end 110B of the conduit 110 and the interference region, wherein the weakened section 150 has a reduced tensile strength less than a tensile strength of the conduit 110 while permitting sliding of the conduit 110 relative to the interior channel upon application of a pulling force on the conduit 110 without causing separation at the weakened section 150, wherein the reduced tensile strength requires a tearing force to cause separation of the conduit 110 at the weakened section 150; a fill opening 130 located on the conduit 110 between the fill end 110B and the interference region, the fill opening 130 positioned within the balloon device 100 such that fluid 1000 entering the fill end 110B exits at the fill opening 130 into the balloon device 100, where the balloon end 110A is occluded to prevent fluid 1000 from flowing therethrough, such that application of the pulling force that overcomes sliding resistance causes movement the fill opening 130 and