VIEGA Rotguss Elbow 90°, 3/4″ Male x Male Thread, Gunmetal (Brass Alloy), Art. 317980

Both ends carry an R3/4 thread: a tapered male thread to DIN EN 10226-1 that seals inside an Rp parallel female thread of the same size. A G-threaded joint usually needs a flat gasket for this; an R thread does not. Wrap the thread with hemp and sealing paste, PTFE thread tape or thread-sealing cord, and use only non-hardening sealants with the DVGW mark.

This 3/4" elbow has male threads at both ends, so it screws into female ports and takes the place of a separate nipple at the bend. A female-threaded elbow works the other way round: male-threaded pipes or nipples screw into it. The right choice depends on what the neighbouring parts end in.

Viega requires the installer to carry out a load and leak test before commissioning, on the completed installation while the pipework is still exposed. If one of this 3/4" elbow's R3/4 joints leaks during the test because of a damaged thread, replace the affected part and document the result.