pulled up at a job the other day and noticed a slight leak so i took the hose insulation off and the plastic elbow snapped

so i want to replace all the hose connectors hose ect from the tank to the hose reel what best for this

Plus the clear hose that i got from purefreedom was white on the inside why has this happened i have always used pure water with my system is it making the plastic brittle

Thanks Paul