Filler Valve Handle Filler Float -Tank Is the string a LINK? Overflow Tube Flush Valve Bowl Siphon How a Toilet Works Some flexible members,such as a belt or chain,may possess one-way rigidity.Such a member would be considered as a link when in tension but not under compression 55 Is the string a LINK? Some flexible members, such as a belt or chain, may possess one-way rigidity. Such a member would be considered as a link when in tension but not under compression