I have a Rheem pool heater hooked up to my 21 foot round pool. I am having an issue with the hoses the pool guy that installed the pool used. THey are grey somewhat heavy duty corregated hoses, but they are coming apart at the neck where they connect to the heater, I am assuming that its due to the hot water that is coming out of the heater. Does anyone have ideas on hosing that I can use to fix this with having to go to hard piping. I will convert to hard pipe if I need to but it is much easyer to use hose. I am having a hard time finding heat rated 2 in pool hosing. Any help will be welcomed!