The Simplex MMR gas manifold is suitable for such health care where the capacity requirement is limited, such as laboratories and small health care clinics Veterinary etc. This gas manifold consists of only one group of cylinders. The regulator is mounted in the collection unit. Each inlet connection has a filter, a non-return valve and a shut-off valve. This arrangement makes it possilble to use one cylinder at a time. In order to obtain a stabile outlet pressure this gas manifold is equipped with a preset two-stage regulator. On the high pressure side of the regulator there is a contact gauge the signal of which can be carried further to an alarm unit. Simplex MMR is delivered mounted and test-pressurized.