Reducing piece 241, ET/IT - Riegler K1808

Reducing piece 241, ET/IT. This range covers 28 variants from 0.98 EUR. Select the version you need above.

Available variants

Shared technical data

About Reducing bushes

Reducing pieces join two pipe threads of different size in a single part, so no adapter pair with an extra sealing point is needed. The group combines female threads from Rp 1/4 to Rp 2 1/2 with male threads from R 3/8 to R 3. The fittings are cast from black malleable iron B350-10.

What matters when choosing

• Thread 1: the female side runs from Rp 1/4 to Rp 2 1/2 and defines the smaller end of the transition.
• Thread 2: the male side runs from R 3/8 to R 3. The combination of both sides gives the reduction step, which should stay within what the line tolerates before flow velocity rises too far.
• Thread standard ISO 7-1: the tapered male threads seal in the thread itself, so sealant and tightening allowance have to be planned for.
• Material: black malleable iron B350-10, design symbol A, a grade specified for mechanical load in pipework.
• Length and across-flats size: in crowded manifolds the length of the reducer decides whether a pipe wrench can still be applied.

Typical applications

• Pipework where a header is stepped down to smaller branches
• Compressed air distribution from the ring main to the machine connection
• Existing heating and water lines where old and new nominal sizes meet
• Connecting valves, filters and stopcocks that carry a different thread size
• Pump and vessel ports where the stub is larger than the continuing line

The fittings in this group are built to DIN EN 10242, the threads follow ISO 7-1 and the material is black malleable iron B350-10 with design symbol A. Surface quality is to DIN 2444 and manufacturing takes place in China.