chosen such that the legs 42 fit snugly in them the bores 43 may extend upward into the body 32 of the riser 31 the bores 43 may be formed to be coaxial with cylindrical recesses 33 in the upper surface 34 of the body 32 of the riser 31 in such case in one embodiment the bores 43 may have a diameter greater than that of the recesses 33 and a shoulder 44 may thus be formed that may limit the depth to which the legs 42 may be inserted into the bore 43 in one embodiment 1 inch pvc schedule 40 pipe may be used for the legs 42 this material is easily cut with hand tools to a desired length and is sufficiently strong and rigid for this purpose the lengths of the legs 42 may be selected such that the pump 18 may be supported above a support surface such as the bottom of a septic tank 10 as pvc pipe is readily cut the length of the legs 42 may be selected and the legs 42 may be cut in the field of course the bores 43 and recesses 33 do not have to be coaxial and their shapes need not be cylindrical as mentioned above the dimensions of the bores 43 and legs 42 may be chosen such that they form a frictional engagement when assembled together this frictional engagement may be sufficiently strong so that an assembly of pump 18 and riser 31 may be lowered into a septic tank 10 without the pump 18 disengaging from the body 32 of the riser 31 and without the legs 42 disengaging from the bores 43 in the body 32 of the riser.