Abstract: A low profile solenoid cartridge valve with replaceable spool preferably includes a valve body, a valve spool, a spool return spring, a solenoid coil, a solenoid plunger and plunger return spring. The valve body includes a spool body, a solenoid body and a threaded manifold end. A spool inner diameter is sized to receive the valve spool. The valve spool includes a chamfered neck. A plunger bore is formed through the solenoid body to receive the solenoid plunger. The solenoid coil includes a coil body and an electrical connector. A solenoid counter bore is formed in the solenoid body to receive the coil body. A chamfered slot is formed on one end of the solenoid plunger. The chamfered slot engages the chamfered neck of the valve spool and forces the valve spool upward to open a flow path in a valve manifold.