You say the existing hose are clogged. I assume that means with scale build up. If so...bofore you go through the process of replacement...may I suggest you buy a gallon of muriatic acid (Home Depot) and pump it through your lines till you see it coming out the through hull. Let it sit for about an hour in the lines. You may cure the problem for about 5 bucks!
(Note...the fume reaction when the stuff hits water is NOT to be breathed in...make sure you have good ventilation.)