  Plastic gas pipes are widely used in experimental setups for gaseous
detectors, due to their flexibility and easiness of use. This report describes
the characterization studies realized on the use of plastic gas pipes,
particularly in relation to the accumulation of impurities in gas systems that
they may cause. A laboratory setup has been implemented to evaluate the
possible effects caused by plastic pipes, in terms of their specific impact on
O2 and H2O accumulation and the consequences on detectors performance. As
Single Wire Proportional Chambers are very sensitive to the presence of
pollutants and gas mixture variations, this type of detector was chosen to
perform the study.
