tightened the seal compressor 514 bears upon the modified frame top 506 and the protruding portion of the rain gutter discharge seal 504 causing the seal 504 to bear against the sides of the rain gutter discharge 502 forming a water seal additional sealing capability can be achieved by placing common sealant material in the trench 522 in this alternative embodiment where the frame 500 is attached to the rain gutter discharge 502 at a point lower than the trough release mechanism 350 a means for attaching the trough release mechanism 350 to the rain gutter discharge 502 is provided as shown in fig1 a bracket portion 550 has a front 550a and two parallel sides 550b c the sides 550b c being spaced for closely receiving the existing rain gutter discharge 502 each of a pair of three piece clamps 552 has two front pieces 552a which are bent for insertion into four slots 550d in the front portion 550a of the bracket 550 each of the clamp front pieces 552a are joined to the respective rear pieces 552b by clamp screws 554 the assembled clamps 552 being shaped to surround and grasp the rain gutter discharge 502 the bracket sides 550b also serve as modified trough release pivot pin braces which hold the trough release pivot pins 352a b the upper pivot stop 356 and the lower pivot stop 358 as previously described a rubber bumper pad 556 is provided.