The XTX50 regulator can be converted from a right handed hose configuration (as supplied from the APEKS factory in the standard) to a left handed one. - This feature is known as the Reversible Venturi System (RVS). Changing the regulator to a left handed configuration is both quick and simple and can be performed by any APEKS Authorised Service Technician. - This system gives the diver the ability to change from a small exhaust tee to a large exhaust tee. The XTX50 regulator incorporates a new twoshot high strength plastic front cover, improving the durability of the most vulnerable part of the demand valve. - A new silicone exhaust valve has been used on the XTX50 regulator improving breathing performance. - The XTX40 octopus can be converted from a right handed hose configuration (as supplied from the APEKS factory in the standard) to a left handed one. - This feature is known as the Reversible Venturi System (RVS). Changing the regulator to a left handed configuration is both quick and simple and can be performed by any APEKS Authorised Service Technician