There’s no factory nipple on the Chinese aluminum manifold, I added the brass one. It’s line goes directly to the face of the pump. This 1.5”x3.0” pump is for lower volume applications, think Colmer style kart motors. It has the vacuum nipple on the face, fuel in and fuel out on the sides. It’s good because of its size. The other diaphragm pumps are like hockey pucks.
