tubing and fittings used for low cost plumbing systems a basic dual bag stand may be explained to a quadruple bag stand by adding a pair of single bag holder modules or units 60 to the basic dual bag holder unit 12 already described in such an expandable stand the end fittings 32 of the h portion 24 ay be x connectors such that an outwardly facing socket 62 is provided at each end of the crossbar 30 each single bag support unit 60 consists of two mutually telescopable u shaped portions formed out of straight lengths of tubing 64 joined by elbow fittings 40 one of the u portions including a t fitting 68 which has a male portion 69 mateable to the socket 62 at the end of the crossbar 30 each of the single bag units comprises a first u section 70 which includes the t fitting 68 and is made out of lengths of tubing 64 joined by elbows 40 and a second u section 72 made of relatively thinner tubing or rod sections 66 which are telescopically slidable within the larger tubing 64 of the first u section such that the two u sections 70 and 72 may be telescoped together or apart to vary the area of the rectangle defined by the unit 60 each of the u sections 70 72 is provided with a pair of hooks 42 the hooks of each.