Patent ID: 7134403

Claim:
An aquarium overflow system comprising a standpipe having an upper end for receiving overflow water above a given level in an aquarium tank, and a lower end for directing the overflow water through a tank wall, an elbow having an elbow outlet mounted to said upper end of said standpipe, and having an elbow inlet, said standpipe comprising an upper tubular member extending downwardly from said elbow and telescopically engaging and slidable along a lower tubular member to provide an adjustable height standpipe for varying the height of said upper end of said standpipe and said elbow, wherein said upper tubular member has a top end providing said upper end of said standpipe, and has a bottom ends, and said lower tubular member has a bottom end providing said lower end of said standpipe, and has a top end above said bottom end of said upper tubular member, and comprising one or more friction resistance members engaging said upper and lower tubular members and applying frictional resistance therebetween to maintain a desired height of said upper tubular member relative to said lower tubular member, wherein said upper and lower tubular members have inner and outer concentric sections radially spaced by an annular gap therebetween, and wherein said one or more friction resistance members comprise one or more resiliently compressible members in said annular gap and bearing between said inner and outer concentric sections.