Abstract: An apparatus for pressure testing of tubulars. The apparatus comprises a tester body having multiple spaced-apart external circumferential seal elements expansible by piston movement; a seal gas saver valve connected to the tester body; and a pressurized seal and test gas source to supply gas to the tester. The tester body is inserted into a tubular so that the seal elements are astride a desired test area, typically a tubular connection. Seal gas pressure is then applied to move the pistons and expand the seal elements against the tubular wall, forming a test chamber. Test gas is then introduced into the chamber to achieve a desired pressure, and external containment and sensing means are used to detect any escape of test gas, thereby showing a leak. When the test is complete, the test gas pressure is released, and the seal gas pressure is reduced, with the seal gas flowing back into a reclamation tank.