1/4″ x 3/8″ BSP Brass Fitting
Common parallel pipe fitting with a flat seat, used to connect 1/4″ and 3/8″ BSP threaded lines.
SPECIFICATIONS
- Overall length: 29 mm
- Wrench flats: 18 mm
- Internal diameter: 7 mm
- Material: Low-lead content brass (CW510L / OT57)
COMPATIBILITY
- Fits: Any application requiring a 1/4″ M BSP to 3/8″ M BSP flat-seat fitting
INSTALLATION
Simple DIY swap; the flat-seat design seals against a washer, not the threads.
PRO TIPS
- Because this fitting seals via its flat seat rather than tapered threads, check the condition of the mating seat washer/gasket, a worn washer, not the fitting, is the most common cause of leaks here.








