A variety of materials stability tests have been completed for
the stainless steel lined PVC UV-Tube, with mixed results.
Concerns about PVC degradation under UV light initially led to
the lining of the tube with stainless steel, and have
subsequently led to the search for new material options. Even
with the lining, with extended UV exposure of stagnant water,
some by-products are produced at detectable levels (most likely
due to the exposed end caps). The levels, however, are well
below levels that would lead to a person to consume a daily dose
above the US Environmental Protection Agencys reference daily
oral dose (see table 1). Serious concerns about unlined PVC and
maybe ABS Although many researchers have investigated the
effects of UV-A and UV-B from sunlight on various materials,
less is know about the affects of UV-C (shorter wavelength UV
radiation) used in water disinfection. To ensure that UV-Tubes
do not produce harmful disinfection by-products, we conduct the
following tests to simulate possible h