A fluid purification device comprising: a tank having a hollow interior and a lock feature , which is a second protrusion extending from the side of the tank ; a cover sealingly coupled to the tank , the cover including a body , which includes a hollow interior portion that is in fluidly communication with the hollow interior of the tank ; and a release assembly pivotally coupled to the cover and engaged with the lock feature, the release assembly having a relief valve fluidly coupled to the hollow interior and a lock member , the release assembly being rotatable between a first position and a second position, wherein the relief valve is in a closed position and the lock member is engaged with the lock feature in the first position, and wherein the relief valve is open and the lock member rotates away from and is disengaged from the lock feature in the second position, characterized in that the tank comprises ribs and the cover comprises slots , formed on the inside diameter of the hollow interior portion , wherein the release assembly comprises a locking arm extending along and extending past the side of the body , which includes a a first projection at the distal end that extends perpendicular to the locking arm end and includes a slot sized to receive the second projection , wherein the cover is configured such that an angled surface of the first projection of the locking arm will contact the second projection causing the release assembly to rotate about an axis such that the first projection of the locking arm slides over the end of the second projection of the tank until the slot aligns with the projection , which is intended to be received in the slot , when the cover is placed on the tank and rotated to engage the rib into the slot . a tank having a hollow interior and a lock feature , which is a second protrusion extending from the side of the tank ; a cover sealingly coupled to the tank , the cover including a body , which includes a hollow interior portion that is in fluidly communication with the hollow interior of the tank ; and a release assembly pivotally coupled to the cover and engaged with the lock feature, the release assembly having a relief valve fluidly coupled to the hollow interior and a lock member , the release assembly being rotatable between a first position and a second position, wherein the relief valve is in a closed position and the lock member is engaged with the lock feature in the first position, and wherein the relief valve is open and the lock member rotates away from and is disengaged from the lock feature in the second position, characterized in that the tank comprises ribs and the cover comprises slots , formed on the inside diameter of the hollow interior portion , wherein the release assembly comprises a locking arm extending along and extending past the side of the body , which includes a a first projection at the distal end that extends perpendicular to the locking arm end and includes a slot sized to receive the second projection , wherein the cover is configured such that an angled surface of the first projection of the locking arm will contact the second projection causing the release assembly to rotate about an axis such that the first projection of the locking arm slides over the end of the second projection of the tank until the slot aligns with the projection , which is intended to be received in the slot , when the cover is placed on the tank and rotated to engage the rib into the slot . <EOS>