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Monjolin® Smart Filter – All in One Downspout Diverter & Filter
Product overview
The Monjolin® Smart Filter was developed to raise the bar for rainwater collection and filtration, combining quality, efficiency, and durability in a simple and practical way. Its operation is based on a filter element capable of retaining fine particles and impurities with minimal waste. The exclusive technology that adapts to different rainfall intensities ensures high performance, even during heavy rains. Every detail was designed to simplify use and reduce maintenance. From the new universal fitting system to the 100% recyclable plastic rotomolded body, the Monjolin® embodies WAAG Tech's commitment to innovation and the environment. With its structural robustness and functional design, the product is established as the ideal solution for residential, commercial, and industrial projects seeking long-term sustainability, efficiency, and reliability.
Main features
New fitting system that allows direct installation on 100 mm, 110 mm, and 4" SCH 40 pipes, without additional adapters.
Simplified Maintenance: Removal and reinstallation of the filter element without tools, just by hand.
Anti-Splash Lid: Prevents splashing and overflow in heavy rains, making it ideal for indoor installations.
Sustainability: Housing made of 100% recyclable plastic, contributing to a greener future.
Greater Resistance: Polyethylene body, more robust and impact-resistant, with greater durability.
Adaptation: The Monjolin® Smart Filter is the only one on the market capable of automatically adapting to different rainfall intensities. This exclusive and patented technology guarantees high performance even in heavy rains, without loss of efficiency.
Fine Filter Mesh: The Monjolin® Smart Filter uses an ultra-fine mesh available in 60 μm or 136 μm versions. Thanks to its adaptation system, even with a finer mesh, the filter maintains superior efficiency, ensuring the best filtration quality on the market.
How the Monjolin® Smart Filter works
The Monjolin® Smart Filter channels rainwater from the roof through a fine mesh filter element
(60/136 micron) that captures leaves, twigs, and solid particles. This process yields clean water suitable for non-potable uses.
The filter element dynamically adapts to rain intensity, ensuring high performance and continuous, efficient filtration even during the heaviest downpours.
Built with a roto-molded body and a functional design, it offers precise sealing and impact resistance. Its extremely simple installation makes it ideal for both residential and industrial applications, requiring minimal maintenance.

