Q. What is a cold water regulator? A. It is a regulator that is designed to be used in water of any temperature. The first stage is environmentally sealed. Q. What is a warm water regulator? A. A regulator designed to be used in water 10 degrees Celsius and above. Q. What is the intermediate pressure of Apeks regulators? A. All Apeks regulators have an intermediate pressure of 9.0 - 10.0 BAR Q. How often should my Apeks regulator be serviced? A. The second stage stage should be serviced annually. The first Stage should have the intermediate pressure checked and filter changed annually and be fully serviced every 2 years. Q. Can my Apeks regulator be converted for Oxygen/Nitrox service? A. Apeks regulators as standard are suitable for use with up to 40% O2 but you must check what regulations apply to your country. For example within Europe we must adhere to the European Standards EN144-3 and EN13949 which state that regulators used with EAN over 21% must use the special Nitrox M26 fitting. The following models can be converted for nitrox use with over 40% oxygen ( up to 100%); T40D, TX40, T50D, TX50, TX100, T20, ATX200, ATX100, ATX50, ATX40, AT20, XTX200, XTX100, XTX50, XTX40, XTX20, Egress, TEK3. Late 5000ST and Sentinels. Older piston first stages cannot be converted. Q. Which way up should the 1st stage be fitted to the cylinder? A. It doesn't matter, it comes down to personal choice. It does not affect the function of the regulator. Q. Do you have agents in other countries? A. Apeks have local agents throughout the United Kingdom as well as International distributors worldwide. Q. Can my yoke clamp regulator be converted to 300 Bar Din? A. Yes, all it requires is a Din handwheel assembly (AP0211) to be fitted in place of the yoke clamp. Q. What is a removable ARCAP seat? A.The seat is the sealing face in the body of the first stage. The Removable ARCAP seat has advantages over a seat machined into the body of the first stage. Firstly it is removable so if the seat was damaged it would not be necessary to replace the whole body of the first stage which would be expensive. Also it can be made of a different material to the brass body. In the ATX200 the seat is made of ARCAP which is a higher 'corrosion resistant' material than brass. A removable seat can also be machined to even finer tolerances than a seat machined into the body of a first stage. Q. Will the Apeks computers allow you to plan a two mix dive in advance? Is it possible to plan a dive time based on a bottom mix followed by a switch to say a 70% decompression mix at 12 metres? A. Yes. This can be done via the computers' simulation software for the interface unit. Q. Can Apeks regulators be left and right handed? A. The XTX, MTX-R and Black Sapphire range of Apeks 2nd stage regulators are suitable for both left and right handed use. An authorised Apeks technician can easily change the hose routing. Contact your local dealer for details. Q. What is TEK3? A. TEK3 is an innovative 1st stage regulator system specifically designed for twinset diving. More information can be found in the PRODUCT SECTION under 1st STAGES Q. What is the purpose of the venturi lever on the 2nd stage of the regulator? A. Many Apeks 2nd stages are equipped with a diver controllable venturi system. This switch allows the diver to control the venturi assist to reduce the sensitivity to free-flow and provide the maximum airflow at depth. Whilst diving the switch should be set to the plus (+) position to achieve maximum assistance for easier breathing. To prevent the 2nd stage from free-flowing this should be set to the minus (-) setting during entry or while swimming at the surface.