Bouchon «3 / 8 » avec joint intégré De Dietrich 0290429

This 3/8-inch plug features an integrated seal for leak-proof closure of threaded ports in heating systems. Ideal for sealing unused openings on boilers, pumps, or manifolds, it prevents fluid or gas escape. The built-in seal simplifies installation and ensures a tight fit. Made from durable materials, it withstands system pressures and temperatures. A handy spare for maintenance and repairs.