Kromschroder test nipple set 74917280

This boiler pipe fitting is a test nipple set with G1/8 thread, machined from brass/steel. It is designed for connecting manometers, test equipment and pressure control devices in gas and air lines. It fits Kromschroder DG/DL pressure switches, gas regulators, and Honeywell gas burner systems. The fitting provides a leak-tight access point for pressure measurement without dismantling the system.

Parts of this type are selected by thread size, sealing method, and pressure rating, which must match the system where they are installed. The G1/8 thread indicates the connection size for mating with a pressure gauge or a hose fitting. These test nipple sets typically include the nipple itself, often with a sealing element such as a flat gasket or o-ring. Before ordering, verify the nipple body material is compatible with the medium and that the sealing surface is clean.

When test nipples deteriorate, pressure sampling becomes unreliable or impossible, and air or gas may escape from the measurement point. A failed or clogged nipple will prevent accurate readings on gauges and test instruments connected to it, making system diagnostics difficult. Observable signs include gas or air leaks around the fitting, difficulty connecting or disconnecting gauges, or a complete loss of pressure signal to attached instruments. If the seal degrades, the system may lose pressure or air where the nipple is installed.