Iceline pipe is a unique innovative product designed and made here in the UK. It has been designed and made to prevent excessive heat build up which can be a problem when using conventional black piping. Iceline is made from the highest quality materials. It has a black inner layer which absorbs U.V. light and a white outer layer to reflect heat and keep the nutrient solutions inside cool. Temperatures are reduced by up to 15%! Keeping the nutrients solution at a lower temperature means increased levels of oxygen and reduced risk of root diseases. It also helps with keeping the pH and EC stable.