GrabLOC® non-terminating, double containment fittings are compatible with all standard sizes of PFA and FEP tubing. They feature a PFA-fitting body and PVDF nut, and are designed so the primary and secondary tubes can pass through the fitting body. This allows chemistry to flow back to the supply source if the primary tube leaks. GrabLOC® terminating double containment fittings feature a PFA-fitting body and PVDF nut and allow termination of the outer containment tubing. This stops chemistry flow at the outer containment tube connection if the primary tube leaks. These fittings are compatible with all standard sizes of PFA and FEP tubing.