Brass Flush Reducing Bushing M/F

Reducing bush M/F in brass threaded, ultra-compact, to reduce or increase the diameter of a connection. The small-diameter male side screws into a female fitting, while the larger-diameter female side accepts a male fitting. ISO 228-1 BSPP standard.

Description of the Reducing Bush M/F in Brass

This reducing bush is an ultra-short fitting that allows a change from one diameter to another in minimal space. The male side screws into an existing female fitting, and the female side accepts a male fitting of a different size.

Its compactness makes it the preferred solution when space is limited or discretion is required. Unlike a reduced coupling or a standard reducer, the reducing bush adds virtually no length to the assembly. Ideal for diameter adaptations in confined spaces.

Technical Specifications

Operating Conditions and Installation

• Operating pressure: PN 16 bar
• Temperature: Depending on the type of sealing chosen
• Fluids: Drinking water, glycol water, compatible fluids
• Installation: Apply moderate tightening torque and choose suitable materials (risk of galvanic corrosion). Wrench flats compatible with standard spanners.

Certifications and Compliance

• Drinking water: Compliant with the French decree of June 25, 2020 relating to metallic materials and products intended for installations in contact with water for human consumption.
• 4MS: Compliant with 4MS requirements — Harmonisation of European certification rules for materials and products in contact with drinking water.

Applications and Installation Tips

Uses

• Domestic plumbing: connection of hot and cold water installations
• Industrial plumbing: installations compliant with PN 16 bar
• Interior decoration: creation of light fixtures, shelves, towel rails in exposed brass
• DIY and creative projects: custom projects with threaded fittings

Installation tips

• Use PTFE tape (Teflon) or hemp to ensure sealing on male threads
• For flat gasket seats, use a flat gasket with a minimum thickness of 1 mm
• Tighten with an open-end wrench or adjustable wrench — do not use pliers to avoid marking the part
• Apply a moderate tightening torque — excessive tightening may damage the thread

Technical Drawing

Dimensions (mm)

All dimensions are expressed in millimetres (mm), unless otherwise stated.

Available Size Combinations

This reducing bush allows a change from one diameter to another. The table below shows the available combinations.

The appearance of the part may vary depending on the batch in stock (see photos). Contact us for confirmation.