The #1 sand filter in the world, Triton II Side Mount Filters are the result of nearly 50 years of product evolution and refinement. It has set the industry standard for effectiveness, efficiency, long runs between service, and providing years of dependable, low maintenance operation. Triton II Side Mount Filters feature a special internal design that keeps the sand bed level, ensuring even water flow, and resulting in the most efficient filtration possible. Note: Valve is not included with filter.