Muller Regulators are German made for precise accuracy and responsiveness. This diaphragm-type vacuum controller mounts with a 1-1/4” pipe mount to vacuum line with one tee—no extra elbows or other fittings are required. Muller Regulators are highly sensitive to vacuum levels from 10” to 18”hg, and they are extremely quiet. No P-Trap is needed, so installation is also very simple. Includes a washable filter, which is easily cleaned and replaced. Operating range: 15–95 CFM U.S.