just viewed this one, I think the 855 cummins has a hose like that ..must be another vent or bleed hose also...I think these designers do not like trapped air pockets.
@@larryanderson8049 the 1 inch hose off back of water pump to upper tank is a blend hose for northern climate. Mixes t-stat hot water back to pump. Faster warm up's. Just got off phone with a Detroit mechanic
just viewed this one, I think the 855 cummins has a hose like that ..must be another vent or bleed hose also...I think these designers do not like trapped air pockets.
@@larryanderson8049 the 1 inch hose off back of water pump to upper tank is a blend hose for northern climate. Mixes t-stat hot water back to pump. Faster warm up's. Just got off phone with a Detroit mechanic