OPW 61SA Series 4 in. Swivel Adaptor 61SALP1020EVR

Pressure decay testing of underground storage tank systems has identified the joint between the tight-fill adaptor and the nipple or tank riser as a persistent leak point.Considerable movement takes place along the hose while the fill elbow is connected. Walk-downs and changes from one compartment to another move the hose across the pavement, rotating the elbow along with it. The result can be a loosening of the adaptor. As the adaptor backs off, the seal between it and the nipple is relaxed and a leak path is created allowing vapors to escape to the atmosphere. Vacuum-assist dispensing systems can aggravate this situation due to the slight pressurization of the UST. The 61SA Swivel Adaptor mates with 4" top-seal delivery elbows and features a top section that rotates with hose movement while the bottom section remains securely in place maintaining seal integrity. Features Dual Seals – ensure a vapor and liquid-tight seal Conductive, Self-Lubricating Retaining Rod – ensures maintenance-free, reliable service life Rod - ensures maintenance-free, reliable service life Same Internal Dimension as Standard 633T Adaptors – to minimize pressure drop and maximize flow rates for quick product delivery Materials Adaptor: bronze  Base: bronzeRetaining ring: conductive nylonSet screws: stainless steelSeals: Nitrile Rubber