Your 38 mm line needs to feed a 32 mm port and you're done guessing. This Jaycar reducer is glass-reinforced nylon – light, strong, and completely immune to corrosion and electrolysis. Shrugs off chemicals and UV. Runs from -20 °C to +110 °C. Two clamps, tighten, sorted
| brand | JAYCAR |
| material | Glass-reinforced nylon composite |
| inlet_size_mm | 38 |
| outlet_size_mm | 32 |
| operating_temp_min_c | -20 |
| operating_temp_max_c | 110 |
| corrosion_resistant | 1 |
| uv_resistant | 1 |
| chemical_resistant | 1 |
| electrolysis_immune | 1 |
| recommended_fitting | Two hose clamps |
| category | Electronics & Components > Automotive & Outdoor Electronics |