iGX800 12GPM 2500PSI and 32" Hephaestus Combo Special.  

Pair 12GPM of high flow to move the 32" surface cleaner at high speed.  This surface cleaner will work with 8 and 10GPM but 12GPM will make it rip!  You can still use 3/8" hose on the reel but 1/2" will improve flow and performance reducing friction and restriction.  Use 1/2" whip lines regardless.