This GUIDI reducing double nipple and reducing fitting in bronze is a straight M-M pipe fitting with external, tapered BSPT threads at both ends. It connects components with internal threads of different nominal sizes and is available in several reducing combinations for small to large marine pipe installations.
The fitting belongs to the GUIDI 0245B series and is manufactured in bronze, which is suitable for demanding maritime environments with saltwater and freshwater. It can be used in pipe installations above and below the waterline, provided the connected components have compatible threads and the same thread standard.
The tapered pipe threads follow EN 10226-1, formerly BS 21. BSPT and NPT have different geometries and must not be combined, even if certain dimensions may appear to fit. When installing, suitable thread tape or sealant must be used, and the risk of galvanic corrosion should be limited in case of inappropriate combination with other metals.
The hexagonal center section allows for secure mounting and tightening with appropriate tools. Depending on the variant, the overall length ranges from 28.5 to 67.5 mm, the wrench size from 19 to 93 mm, and the internal bore or clearance from 8.5 to 65 mm. Several variants have documented dimensions for axial thread sections, drilling, height, and weight.
Key features
Reducing, straight M-M pipe fitting
External BSPT thread at both ends
Thread standard: EN 10226-1 / BS 21
Manufactured in bronze
Multiple reducing thread combinations
Hexagonal center section for tool mounting
Overall length: 28.5–67.5 mm depending on variant
Wrench size: 19–93 mm depending on variant
For marine salt and freshwater systems
Suitable for installation below the waterline
GUIDI series 0245B
