ZVac Compatible Central Vacuum Pipe Tubing 56.5" Replacement for Central Vac Built in Vacuum Pipe. Works with Nutone, Beam, Vacuflo, Dirt Devil, Broan, Eureka, Hayden, Honeywell 56.5" of central vacuum pipe. Designed, developed and made in America by ZVac. Works with all brands of central vacuum cleaners. Pipe measures 2" OD by 56.5, designed and developed for use with all central vacuum cleaner systems. Buy quality central vacuum pipe by ZVac in 56.5" packs of 1, 5 or 25.