Ret Tank Mixer Assm, 18 x 65 Tank Tri-Sh

The Retention Tank Mixer Assembly for 18" x 65" tanks is a tri-shaft mixing unit built for larger oxidation and contact-treatment systems. In water-treatment trains that inject chlorine, peroxide, or another oxidizer ahead of a retention vessel, this assembly drives the turbulence and blending needed to ensure the chemical reacts fully with the incoming water across a tall, large-diameter tank where uneven mixing would otherwise be a real risk.

This complete assembly includes both the tank head and a bottom mushroom diffuser, supplying the upper mounting and lower flow-distribution hardware required for a proper installation in an 18 x 65 retention tank. The tri-shaft configuration provides extensive mixing action, which is especially important in larger vessels where water could otherwise find a path of least resistance and bypass adequate contact time. Thorough mixing ensures dissolved iron and sulfur are fully oxidized into particles the downstream media can remove.

• Tri-shaft retention tank mixer assembly
• Engineered for 18" x 65" retention and contact tanks
• Includes tank head and bottom mushroom diffuser
• Maximizes blending of injected oxidizers with feed water
• Supports thorough iron, sulfur, and contaminant oxidation
• Weighs approximately 9.7 lbs

Adequate contact time and uniform mixing are what allow a retention tank to convert dissolved contaminants into filterable particles. When water short-circuits through a poorly mixed tank, treatment falls off and downstream filters work harder, clogging sooner and letting more contaminants slip through to the home. The mushroom diffuser at the base distributes incoming flow across the tank's cross-section, while the multiple shafts keep the chemistry well blended throughout the tall column. Installing this tri-shaft assembly in a new build, or replacing a worn unit, restores the internal flow dynamics that keep oxidation effective at scale. For large-capacity 18 x 65 retention tank systems, this mixer assembly from Water Softener Plus is a dependable performance component.

When ordering a replacement, match the assembly to your 18 x 65 tank dimensions and shaft style to guarantee a proper fit. Pairing the refreshed mixer with routine checks of the injection pump and contact-tank hardware keeps a large oxidation system running at full effectiveness, protecting the downstream filters and the quality of water reaching the home. For large oxidation systems, a sound mixer assembly is the difference between reliable treatment and frustrating breakthrough.