Double‑Wall Containment — 110% Built‑In. Audit‑Clean.
Stop guessing with berms. This page outlines the double‑wall tank systems we supply and how James Riggins specifies containment, monitoring, fittings, and seismic/wind anchorage—so you meet EPA/SPCC without external dikes and pass audits.
The James Factor: Double‑Wall Specs that Don’t Leak, Warp, or Fail Audits
James matches containment path, venting/monitoring, fittings, anchors, and materials—so your tank stores clean, alarms correctly, and passes audits first time.
Related systems: Monitoring & Automation · Chemical Feed Skid Systems · Chemical Transfer Pumps
Double‑Wall Types: Choose a System for Your Duty
Extrusion‑Wound Double Walls (PP/PE): large engineered systems up to 50,000 gal; ~200°F service when PP; extreme longevity vs. FRP/steel.
Captor® (Rotomolded XLPE): enclosed tank‑in‑tank; UFO™ sealed sidewall fittings on primary; clean interstice.
Dualline™ (Freestanding): flat‑bottom, min. 110% containment; no sidewall fittings (top‑draw kits & sight gauges available).
Day‑Tank / Compact Units: 35–1500 gal integrated containment; automatic compliance for labs/commercial.
Need pumps or controls, too? See Chemical Transfer Pumps and Monitoring & Automation.
Applications & Industries
Ideal where regulations require secondary containment and berms are impractical—without rainwater, debris, or trip hazards.
The Bottom Line: Built‑In Compliance, Clean Installs, Lower Risk
Get the Right Double‑Wall Tank, Guaranteed.
Avoid fines and rework. Get a free consult with James Riggins to match resin, containment, fittings, anchors, and monitoring to your chemistry and site.
*Availability of NSF/ANSI 61 and specific calcs varies by vendor/model. We’ll confirm at spec.
Double‑Wall FAQ
Why choose double‑wall over a berm + single‑wall?
Double‑wall provides enclosed 110% containment without rainwater/debris management, reduces trip hazards, and often cuts install cost vs. building a dike.
How do we monitor the interstitial space?
We provide a leak alarm port with dry contact for SCADA. Routine checks are clean and visual; no standing water like berms.
Can I put sidewall fittings on all double‑walls?
Dualline™: no sidewall fittings—use top‑draw kits and reverse sight gauges. Captor®: use UFO™ sealed sidewall fittings on the primary while maintaining the interstice seal.
What resins handle my chemistry and temperature?
XLPE/HDPE cover most ambient chemical duties. PP handles hotter service up to ~200°F water and many chemicals. We’ll match resin to MSDS and duty cycle.
Can Liberty integrate pumps, skids, and monitoring?
Yes. Single‑point accountability—tanks, feed skids, transfer pumps, and SCADA‑ready controls—all spec’d by James.
