depicted as a rectangular box that may be supported by concrete slab 18 cover 1 may be bolted to concrete slab 18 or attached in any suitable manner known in the art as shown in fig2 concrete slab 18 may go below the surface s which may be the ground pavement or the like concrete slab 18 also may rest upon the surface s slab 18 may be of various sizes depending on the size of the fluid conveying device and the cover 1 while the slab height 18h may be any suitable distance in one embodiment the slab height 18h may be several feet so that the cover may be protected from various dangers such as automobiles that may drive into and damage covers and fluid conveying devices that are installed adjacent parking lots and roadways the slab 18 may be pre fabricated or it may be poured around piping p and on either side of the drain channel 5 according to the principles of the invention cover 1 may be of any construction for example cover 1 may include access doors to allow for service and monitoring of the fluid conveying devices similar to that described in u s pat nos re 33 523 and 4 890 638 the disclosures of which are incorporated by reference herein in their entirety access doors are shown in fig2 and 3a the cover also may be constructed as a single structure where access is achieved by removing the cover in a manner similar to that described.