18 x 65 Natural Mineral Tank – 4″ Top Opening with Base

The 18″ × 65″ Natural Mineral Tank provides substantial treatment-media capacity for commercial water softening, filtration, ion exchange, and specialty media systems. Its 18-inch-diameter, 65-inch configuration is designed for equipment requiring greater media volume, increased bed area, and higher treatment capacity than standard residential mineral tanks.

A 4-inch top opening provides improved access for installing compatible control valves, tank adapters, riser tubes, and distributor assemblies. The exact neck thread and required adapter must be confirmed before selecting the control valve or internal components.

Composite FRP construction provides corrosion resistance and structural strength without the rust concerns associated with conventional steel vessels. Its natural off-white exterior creates a clean, professional appearance for commercial equipment rooms, OEM systems, pretreatment equipment, and private-label water-treatment assemblies.

An included support base helps maintain the vessel in its required vertical position. Depending on the selected media and required freeboard, an 18×65 tank may be configured with approximately 5 to 6 cubic feet of compatible treatment media.

Treatment-media quantity, service-flow rate, pressure loss, distributor configuration, backwash requirement, and control-valve capacity must be calculated for the intended application. The 18-inch tank diameter may require substantial backwash flow, making proper hydraulic sizing essential.

Technical Specification

Key Features

• 18″ diameter x 65″ height mineral tank
• 4″ top opening for large control valves and high-flow systems
• Includes heavy-duty base for enhanced stability
• High-strength composite / FRP construction
• Corrosion- and chemical-resistant exterior
• Compatible with carbon, calcite, resin, and specialty media
• Natural finish for professional installations
• Designed for high-capacity and high-flow water-treatment systems

Applications

• Large whole-house water filtration systems
• Commercial and light-industrial carbon filtration
• High-capacity neutralizer and calcite systems
• High-flow commercial water softeners
• Specialty and mixed-media filtration systems
• OEM and private-label water-treatment assemblies

Shipping Information

Optimal Purity Solutions is committed to fast, reliable, and professional fulfillment for our authorized dealer network.

Fulfillment & Processing

• Order Processing: Most in-stock orders ship within 1–2 business days

• Custom/OEM Builds: Lead times vary by configuration; your sales representative will confirm timelines

Shipping Coverage

• Domestic: Nationwide shipping throughout the United States

• International: Available for qualified distributors (terms and transit times vary)

Carriers & Methods

• Shipments are sent via trusted national freight and parcel carriers

• LTL/FTL freight available for pallets and bulk orders

• Expedited shipping options available upon request

Packaging & Handling

• Products are professionally packaged to protect against damage in transit

• Palletized and freight shipments are secured and labeled to industry standards

Tracking & Support

• Tracking information is provided once your order ships

• Our logistics team is available to assist with routing, delivery coordination, and special requirements

Important Notes

• Shipping costs are calculated based on weight, dimensions, destination, and service level

• Damages or discrepancies must be reported within 48 hours of delivery

• Products are sold exclusively through authorized water treatment dealers and partners