By choosing Bestweld "Belled-end" fittings seven of nine U.S. manufacturers of jet refueling equipment have upgraded their piping systems and lowered their piping costs. Manufactured in accordance with MSS SP119, Bestweld "Belled-end" fittings are capable of withstanding the higher working pressures found in today's hydrant refueling systems and Bestweld "Belled-end" fittings afford installers with significant cost savings. The Bestweld "Belled-end" design eliminates nearly all weld "prep", wall mismatch and misalignment problems. Fitting installation is four to seven times faster than standard buttwelding.