Evaporative Check Valve: Testing and Inspection

1. Remove the check valve (two-way).
2. Attach an air hose to the SST.




3. Set the SST to port A as shown in the figure.
4. Verify that there is airflow from port B when pressure of +0.99 kPa {+7.4 mmHg, +0.29 inHg} is applied to port A.
- If there is no airflow, replace the evaporative gas check valve (two-way).

5. Verify that there is airflow from port A when pressure of +0.99 kPa {+7.4 mmHg, +0.29 inHg} is applied to port C.
- If there is no airflow, replace the evaporative gas check valve (two-way).