Abstract: Plant irrigation apparatus is provided with a reservoir. Water is placed inside the reservoir filling a portion of its volume. A pressurized gas is also introduced into the reservoir. The water is forced by the gas pressure out of the reservoir through at least one outlet conduit communicating with the water in the reservoir. Water leaves the outlet conduits through at least one discharge outlet. The apparatus can include structure for hanging the apparatus from a plant grow pot. Gas pressurization apparatus is utilized to provide a substantially constant supply of pressurized gas in the reservoir.

Abstract: A building sheet suitable for roofing and siding provides a weatherproof lap joint having an antisiphon gap when installed partially overlapping an adjacent like building sheet by spacing the entire overlapping portion of one sheet above the lapped portion of an adjacent sheet. Parallel strengthening ribs formed into the building sheet are structurally modified along one edge to form an overlapping member and along the opposite edge to form a lapped member. The overlapping member includes an intermediate strengthening bead and an exterior downwardly projecting sealing lip which rests upon the lapped member of an adjacent sheet and spaces the entire overlapping member of one sheet above the lapped member of the adjacent sheet.