Systems for use in one or more sludge or waste collection devices (e.g., containers, vessels or basins). One such system is a sludge removal system for removing sludge from one or more sludge collection devices. The sludge removal system includes one or more sludge removal grids disposed in one or more sludge collection devices. Each sludge removal grid preferably includes at least one header and a plurality of sludge collection laterals. Another such system includes a fluid distribution system for distributing one or more fluids in one or more sludge or waste collection devices. A movement restricting or prevention member is provided in both the fluid distribution and sludge removal systems to prevent or restrict movement of the sludge collection laterals and the fluid distribution laterals away from or towards a floor of a corresponding collection device without anchoring or fixing the laterals to the floor.