Double Containment Valve Boxes

Double containment valve boxes are designed to house and protect valves in dual wall piping systems. These double containment valve boxes include a true union industrial ball valve or check valve with an elastomer seal. Double containment (DC) valve boxes allow flow control valves to be installed within double pipe systems while maintaining an extra layer of protection. The double containment design features an inner carrier pipe that transports the liquid and an outer containment pipe that encases the carrier pipe. In case of a leak in the carrier pipe, the liquid is contained within the outer pipe, preventing environmental release, damage, or contamination. DC valve boxes are used for liquid flow control and to safeguard workers, equipment, and the environment from leaks.

Double containment valve box sizes range from 1/2ʺ x 2ʺ up to 2ʺ x 4ʺ in carrier pipe by containment pipe diameters. Additional sizes are available on request. Double containment valve boxes come in SCH 40 x SCH 40, SCH 80 x SCH 80, and combination SCH 40 x SCH 80 sizing standards. Available carrier valve options include true union ball valves and true union check valves. Available gasket options include EPDM and FKM. Carrier valves come with PTFE seats. All double containment valves are assembled with silicone free, water soluble lubricant. Double containment valve boxes can be installed horizontally or vertically. 

Double containment valve boxes are made in the USA by Spears Manufacturing®. They are manufactured from high grade PVC or CPVC thermoplastic. These materials provide reliable chemical resistance and mechanical strength. They comply with industry standards including ASTM, NSF, UL, and ISO certifications for heavy duty performance, reliability, quality, and safety. Their double containment engineering can be used to meet regulatory codes and laws that require secondary containment. DC valve boxes are rated to SCH 40 or SCH 80 fluid pressures and operational temperatures up to 140°F (PVC) or 200°F (CPVC). Double containment valve boxes come with a containment valve box fitting with threaded access plug, a true union 2000 industrial ball valve or check valve with lockout, and centralizers to secure the valve within the containment box.

• Material Profile: PVC Type I Class 12454 or CPVC Type IV Class 23447 
• Material Options: PP or PVDF may also be available on request
• Type: Valve box with true union ball valve or check valve 
• Color: White, clear, or dark gray
• ASTM Standards: D1784, D2466, D2467, F439, F2618, D3034, E84
• Certifications: NSF 14, NSF 61, UL 94
• Pressure: Full SCH 40 or SCH 80
• Temperature: PVC: 140°F (60°C), CPVC: 200°F (93°C)
• Sizing Standard: SCH 40 and SCH 80 
• Size Options: 1/2ʺ x 2ʺ to 8ʺ x 12ʺ 
• Connection Options: True union

Our double containment valve boxes offer many features and benefits due to their professional engineering and production that make them a key component in dual pipe systems and critical applications. Their built-in containment enhances safety by capturing leaks and failures. Their design helps companies, facilities, and owners comply with strict safety guidelines and ecological regulations by preventing the environmental release of hazardous substances that could cause damage to public health, equipment, and the environment. This extra protection also increases the working life of plumbing systems by reducing damage to the pipeline and contains leaks for easier maintenance and repair. Double containment valve boxes allow leak detection systems to be integrated for real time monitoring and prompt response to potential issues. Their true union design allows easy maintenance and quick removal for limited downtime.

• Enhanced Safety: Dual containment design provides a secondary barrier against leaks to protect both personnel and the environment.
• Chemical Resistance: PVC and CPVC materials for compatibility with a wide range of corrosive chemicals.
• Durability: Engineered for long term performance with high impact and stress resistance.
• Leak Detection: Compatible with various leak detection systems for proactive maintenance and preventative safety.
• Ease of Installation: Slip on sockets and true union connections reduce installation time and labor costs.
• Lightweight: Low weight synthetic makes for easy transport and installation.
• Compliance: Built to meet regulatory codes for containment and release prevention for applications handling hazardous materials.

Double containment valve boxes are an integral component for flow management in a variety of industries and applications. In chemical processing plants, they help prevent leaks of dangerous chemicals and contain waste solutions. In wastewater treatment facilities, double containment valve boxes ensure safe and compliant handling of effluents and treatment chemicals. Pharmaceutical manufacturing relies on their precision and reliability for managing sensitive compounds. The oil and gas industry uses dual pipe valve boxes to maintain safety standards while transporting volatile substances. In food and beverage production, they are used for their hygienic and secure fluid handling capabilities.

Ensure the highest safety, reliability, and compliance with our industry leading solutions. Don't compromise on safety — choose Spears® double containment valve boxes for unparalleled protection and performance of critical pipelines that handle hazardous or corrosive chemicals and application materials. Explore our extensive product range and discover the difference PVC Pipe Supplies can offer with our professional products and lowest price guarantee. Contact us today to learn how our double containment valve boxes can protect your operations, meet regulatory compliance, and provide peace of mind. Reach out to our expert team for information, price quotes, and details on contractor pricing and bulk discounts.