VIEGA Transition Nipple 1/2″ x 3/8″ (Male x Male Thread), Silicon Bronze, Model 3246, Art. 441517

Both ends are male, meaning the thread is on the outside of the nipple. The R 3/8 end screws into a 3/8" female port, while the G 1/2 end needs a part with a G 1/2 female thread designed for cone sealing. Use it when both pieces you want to join have female threads.

The nipple has two different threads. R 3/8 is a tapered thread to DIN EN 10226-1 that seals in the thread itself, so it needs hemp with paste, PTFE thread tape or thread-sealing cord. G 1/2 is a parallel thread, and on that end the joint seals at the inner cone.

Yes. Art. 441517 is listed on DVGW certificate DV-7401AO2957, whose scope is products for gas and water supply, and its specification names drinking water, heating and gas. A qualified installer should fit it and carry out a load and leak test before the system goes into service.