Pond plumbing fittings flanged tank connector suitable for our pond liners, water tanks, filter systems. Fits solvent weld pipework. Large flange, give larger surface to seal against liners. Stainless steel screws. Used widely as inlets and outlets to filter systems, returns into the pond and drains. Solvent weld flange tank/liner connector is a multi use pond fitting. The flange on this tank connector allows them to be easily sealed against pond liners with the use of silicone.