October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Check Valve

Check valve is a 1-way flow valve. It prevents exhaust manifold air from backing up through the system and reaching air pump. Check valve will be found either in tubing, leading to injection manifold or as an integral part of manifold.

Fig 1: Three Different Types of Air Injection Systems Used (V8 Engines) Air injection systems may vary according to equipment.