Test Plugs & Accessories
Filters 33 Results
$8.15
Subject to factory lead times
$8.59
Subject to factory lead times
$12.14
Subject to factory lead times
$8.15
Subject to factory lead times
$8.59
Subject to factory lead times
$12.14
Subject to factory lead times
$10.22
Subject to factory lead times
$10.22
Subject to factory lead times
$14.37
Subject to factory lead times
$14.37
Subject to factory lead times
$48.53
Subject to factory lead times
$56.52
Subject to factory lead times
$56.52
Subject to factory lead times
$15.17
Subject to factory lead times
$16.84
Subject to factory lead times
$23.45
Subject to factory lead times
$24.07
Subject to factory lead times
$20.45
Subject to factory lead times
$19.82
Subject to factory lead times
$43.04
Subject to factory lead times
$46.37
Subject to factory lead times
$11.14
Subject to factory lead times
$11.14
Subject to factory lead times
$10.72
Subject to factory lead times
$8.15
Subject to factory lead times
$8.59
Subject to factory lead times
$12.14
Subject to factory lead times
$8.15
Subject to factory lead times
$8.59
Subject to factory lead times
$12.14
Subject to factory lead times
$10.22
Subject to factory lead times
$10.22
Subject to factory lead times
$14.37
Subject to factory lead times
$14.37
Subject to factory lead times
$48.53
Subject to factory lead times
$56.52
Subject to factory lead times
$56.52
Subject to factory lead times
$15.17
Subject to factory lead times
$16.84
Subject to factory lead times
$23.45
Subject to factory lead times
$24.07
Subject to factory lead times
$20.45
Subject to factory lead times
$19.82
Subject to factory lead times
$43.04
Subject to factory lead times
$46.37
Subject to factory lead times
$11.14
Subject to factory lead times
$11.14
Subject to factory lead times
$10.72
Subject to factory lead times
- A test plug is a small fitting with a self-sealing rubber core that lets you push a probe (pressure or temperature) through it without disassembling the piping. Used to spot-check gauges and thermometers, troubleshoot pressure drop across filters and heat exchangers, and verify readings during commissioning. The probe goes in, you get the reading, the probe comes out, the rubber core reseals.
- The rubber core is normally squeezed closed by its own elasticity. Pushing a probe through it parts the rubber around the probe (the rubber stays in contact with the probe shaft, blocking leakage). When the probe is pulled out, the rubber springs back and reseals. Good for pressures up to a few hundred psi and temperatures within the rubber's rating. EPDM for water, fluorocarbon for higher temperatures and chemicals.

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About NISCO Inc.
NISCO offers a wide range of pressure gauges & instruments, diaphragm seals, thermometers, valves, and flow control products to the industrial and commercial marketplaces, as well as other resellers like ourselves. We can also provide other value-added services such as gauge repair, NIST traceable calibration, diaphragm seal assembly, and valve automation. NISCO takes pride in providing extensive product knowledge, helpful customer service, and market competitive pricing to help fit whatever need you may have because it is our goal to be regarded by our customers as the best supplier of pressure, temperature, and flow control products.

