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C30 P VV <br />OPW 61SA Swivel Adaptor (61SALP-1000 61SALP-1010 61SALP-1020 61SALP- <br />1020-EVR) <br />Pressure decay testing of underground storage tank systems has identified the joint <br />between the tight -fill adaptor and the nipple or tank riser as a persistent leak <br />point.Considerable movement takes place along the hose while the fill elbow is <br />connected. Walk -downs and changes from one compartment to another move the hose <br />across the pavement, rotating the elbow along with it. The result can be a loosening of the <br />adaptor. As the adaptor backs off, the seal between it and the nipple is relaxed and a leak <br />path is created allowing vapors to escape to the atmosphere. Vacuum -assist dispensing <br />systems can aggravate this situation due to the slight pressurization of the UST. The <br />61 SA Swivel Adaptor mates with 4" top -seal delivery elbows and features a top section <br />that rotates with hose movement while the bottom section remains securely in place <br />maintaining seal integrity. <br />Table of Contents: <br />1. Features <br />2. Ordering Specifications <br />3. Certifications and Listings <br />4. OPW 61 SA - Tool <br />5. Additional Resources <br />M <br />