Leopold underdrain systems are high-performance filtration components designed to optimize filtered water collection and uniform air/water distribution during backwashing in water and wastewater treatment plants. Constructed from durable, corrosion-resistant HDPE, the modular snap-together block design ensures less than ±5% maldistribution, improving filter performance, extending run times, and reducing backwash water usage. Available in multiple profiles (Type S, SL, XA) to suit various filter depths—including shallow designs—Leopold systems can be paired with I.M.S® media retainers to eliminate gravel support and allow deeper media beds. Engineered for potable water, wastewater, and desalination pre-treatment, they provide reliable, long-lasting performance under demanding operating conditions.