Standard adapter Inlet installation kit to update or install with any central vacuum system utilizing patented 2 x 2 adapters to connect to regular PVC piping 2 x 2 adapters create a seamless connection between central vacuum sized fittings and standard PVC pipes, allowing you to purchase inexpensive and readily available plumbing PVC for your installation White, 3 in. X 5 in. Tall non-electric Inlet features a sleek, spring-loaded door for a discreet design Utilizing standard plumbing PVC saves you time and money Compatible with most major brands of central vacuums, including: beam, MD, Canavac, Cyclovac, VacuMaid, Vacuflo, imperium, Honeywell, Husky