Retaining split ring with clamp

An assembly for securing equipment to a tank, the assembly comprising:

• a base comprising:
• a tank engagement portion connected to a sidewall of the tank at an opening in the tank;
• a base aperture;
• an lip positioned along a perimeter of the base aperture;
• and
• a first mating surface;
• a split ring comprising a first ring portion and a second ring portion defining a split ring aperture, the split ring including a second mating surface in contact with the first mating surface to position the split ring at least partially within the base such that the split ring is nested within the base aperture and forms a gap between the split ring and the lip;
• a device positioned within the gap and arranged approximately in the confines of the sidewall of the tank and secured between the split ring and the lip, wherein the device is configured to interface with the opening in the tank;
• and
• a clamp positionable to hold the first mating surface in contact with the second mating surface, the clamp comprising:
• a clamp aperture;
• a first contact surface in contact with the base when the clamp is positioned to hold the first mating surface in contact with the second mating surface;
• and
• a second contact surface in contact with the split ring when the clamp is positioned to hold the first mating surface in contact with the second mating surface.