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difference of 38 to 14 vacuum hose sizes

3/8 vs 1/2 Air Hose | Vacuum Pump Hose Sizes & 1/4 Vacuum Line Guide

1/4 vacuum hose HVACNathaniel Paul Gepuela

Choosing between 3/8" and 1/4" vacuum hoses can make a big difference to evacuation speed and system performance. This guide explains hose sizing in plain terms so you can pick the right setup for faster, more reliable HVAC work.