FasTest External (FE) Connectors seal conventional and non-standard surfaces, connect to any tube or pipe, smooth or threaded. Compressed air activates the elastomeric seals for a full-flow test to 500 psi with air, gas or liquid. Uniform seal movement makes a virtually leak-proof connection, even over threaded, rough and oily surfaces. Testing, filling or flushing of the test piece is accomplished by introducing media through the FasTest connector.