The Clip On Regulator is designed to be used on cylinders supplying Propane gas appliances requiring an inlet pressure of between 1 and 16 bar, and requiring operating outlet pressure of 37 mbar. It is fitted to any cylinder fitted with a 27mm diameter automatic valve. The cylinder must always be kept in an upright position and, if used externally, must be kept under cover. No attempt should be made to adjust the pre-set outlet pressure of the regulator. If you have any problems connecting the regulator to your cylinder, contact your local gas supplier at once.