This GUIDI bronze M-F reducing bush is a straight pipe fitting with male and female threads for transitioning between different nominal pipe threads. It is designed for marine plumbing, hydraulic, and fluid systems, including fresh water, seawater, cooling water, diesel oil, and installations below the waterline.
The fitting allows for connecting threaded components of different sizes without altering the rest of the piping. The hexagonal design provides good wrench surfaces for controlled assembly with appropriate tools. Bronze is well-suited for maritime environments due to the material's corrosion resistance and long-term stability.
The variants cover reductions from 3/8″ to 1/4″, 1/2″ to 3/8″, 3/4″ to 1/2″, 1″ to 3/4″, 1 1/4″ to 1″, 1 1/2″ to 1 1/4″, 2″ to 1 1/2″, and 3″ to 2½″, specified as male to female thread. Dimensions vary by variant: total height 17.5–52 mm, dimension A 11.5–28.5 mm, and wrench size 19–93 mm.
The threads follow EN 10226-1 / BS 21. Depending on the variant, the thread design is BSPT male and BSP or BSPP female. BSP and NPT threads are not mutually compatible, and the thread type, standard, and the design of mating parts must therefore be verified before installation. Suitable thread tape or thread sealant is recommended where required by the installation.
In installations with a risk of galvanic corrosion, improper connection of dissimilar metals should be avoided. The fitting belongs to the GUIDI 0241B series and is available in several variant designs with manufacturer numbers 0241B.200202, 0241B.200205, 0241B.200208, 0241B.200211, 0241B.200214, 0241B.200217, 0241B.200220, and 0241B.200226.
Key featuresM-F reducing bush with male and female thread
Made of bronze
Series 0241B
Thread standard: EN 10226-1 / BS 21
Variant sizes: 3/8″–1/4″ to 3″–2½″
Hexagonal wrench surfaces
Suitable for marine saltwater and freshwater systems
Not documented as NPT compatible
