vent line cap 10 will be made available in a variety of diameters to properly mate with the outer diameters of various standard vent lines 105 as shown in fig1 the vent line cap 10 includes a molded shroud assembly 20 and a substantially flat strap clamp 50 that encircles the vent line 105 the strap clamp 50 is used to attach the vent line cap 10 to the vent line 105 beneficially using only common tools and such that the vent line cap 10 is rigidly fixed to the vent line 105 but readily removed if desired the shroud assembly 20 covers the vent line 105 opening preventing foreign materials such as twigs leaves small animals birds or the like from gaining entrance to the vent line 105 and subjacent plumbing while still allowing air to freely enter or exit the vent line 105 fig2 provides a front perspective view of the vent line cap 10 the vent line cap 10 includes the shroud assembly 20 the strap clamp 50 and a support bracket 70 the shroud assembly 20 has an open bottomed cone segment shaped cross section that is formed by an outward flaring side 22 and a generally circular.