Klir 4" Flow-Diverting Cap

Klir Automatic Fleece Filter 4-Inch Flow-Diverting Cap (SKU: CV-KLIR-DI4-CAP)

The Klir Automatic Fleece Filter 4-Inch Flow-Diverting Cap (SKU: CV-KLIR-DI4-CAP) is an authentic structural OEM replacement component distributed by CoralVue to maintain peak mechanical filtration efficiency inside your sump basin. Drop-in automatic roller filters serve as a massive upgrade over traditional cloth socks, continuously winding a non-woven fleece roll to pull out organic waste before it decays into nitrates and phosphates. Because raw aquarium water enters the core of the drop-in unit from high-velocity drain lines, water naturally seeks the path of least resistance. Without a secure lower boundary, water would blast straight out of the bottom of the filter assembly without properly passing through the fabric mesh. This flow-diverting cap is strategically designed to plug the bottom aperture, pushing the water laterally through the submerged fleece matrix to guarantee pristine water clarity.

Molded to exact commercial manufacturing tolerances, the CV-KLIR-DI4-CAP snaps cleanly onto the lower rim of the Klir Di-4 Drop-In Filter base. It is a critical functional element of the system's fluid dynamics; running the unit with a cracked, missing, or loosely seated cap allows raw, unfiltered detritus to spill out into your clean return pump chamber. Over time, heavy handling during semi-annual deep cleanings or accidental drops during maintenance can damage the mounting clips on the original part. Swapping a damaged piece for this fresh factory-original cap instantly restores absolute filtration security and ensures you are getting the absolute most out of every 25-yard roll of fleece.

Key Features

• Halts Direct Sump Bypassing: Guarantees 100% of the raw drain water entering the roller core is processed through the mechanical fleece barrier.

• Stabilizes Lower Frame Rigidity: Acts as a structural brace along the bottom track of the side plates, keeping the entire acrylic and polymer frame perfectly square under water pressure.

• Smooth Snag-Free Profile: Engineered with smooth internal deflection curves that won't tear or snag the sensitive 50-micron fleece as the motor advances the roll downward.

• (Note: This retail SKU contains (1) standalone replacement 4-inch flow-diverting cap. Complete Klir Di-4 automatic roller filter frames, 12V DC motor blocks, clean media spindles, and smart level sensors are sold under separate product categories).