Premium 4MM Schrader Valve T-Piece Air Suspension Repair / Emergency Bypass Kit. TMH4KITP by TMH Air Suspension Solutions. Part # TMH4KITP. *** This particular listing is for our 'Premium' range, Similar to our nylon based 4mm solutions - but with a fully nickel-plated brass T Piece and valve. Schrader / Tire Valve to Push-Fit T-Piece Kit - 4mm Air Suspension Repair Kit - Car Suspension Compressor Bypass Kit, Self Levelling Suspension / EAS Error Fix. *** If you are experiencing the dreaded compressor failure, or simply the Self-Levelling Suspension/EAS error you can use this 4mm kit to stay on the road! Even with a completely non functional compressor you can evenly fill two airbags using a standard tire valve - simply cut, or remove the hoses where they meet the compressor, push them into the push fit T-piece connector and fill using a 12v or petrol station air pump. *** Each unit will be sufficient for an axle, if front & rear are sagging - two of this item will be required. The T-Piece ensures an even fill of your air suspension - recommend a fill of 5-6 bar. This kit is compatible with any vehicle using 4mm outer diameter air line. *** 4MM air line is commonly used in the following vehicles: Compatible with Mercedes Benz. Compatible with Audi. Compatible with BMW. Compatible with Volkswagen. Compatible with Bentley. Compatible with Jaguar. Compatible with Jeep. Compatible with Land Rover. Compatible with Range Rover. *** Schrader/Tire Valve to Push-Fit T-Piece Kit installation job: Designed for Manual Refill & Compressor Bypass of Air Line Air Suspension Systems Ensuring Even Pressurization Across a Single Axle. If your vehicles air suspension is experiencing compressor failure or leaks, you can use this system to manually refill it using an external air source, via the attached Schrader/Tire Valve. This allows temporary inflation of the air suspension to maintain ride height until permanent repairs are made. The unique T-Piece design ensures even re-pressurization of air struts. *** Tools Needed: Schrader/Tire Valve to Push-Fit T-Piece Kit (1 Per Axle). Utility Knife or Air Line cutter (Not Provided). *** Step-by-Step Guide: - Identify the Air Line. Locate the air supply line running from the compressor to the valve block. Common locations: under the vehicle near the compressor (typically around the spare tire area on many models), the valve block or near each strut. - Squarely Cut Each Air Line. Use a sharp air line cutter or utility knife to make a clean, straight cut. Both the left and right air strut air hoses will need to be cut cleanly. Avoid crushing or kinking the line, as this can restrict airflow. - Attach Air Line to Left/Right Connectors on the T-Piece. Using the Push Fit (Blue) connector on the t-piece, securely push each cut air line into the ‘teeth' of the connector. This will create a sealed circuit for both and can then be re-inflated. - Refill the System. Use a standard air compressor or portable air pump to inflate the system via the Schrader valve. Inflate gradually, monitoring height to avoid over-pressurizing the air struts. - Seal or Cap the Valve. Once inflated to the desired height, cap the Schrader valve to prevent air loss.