Spring in bottem heater hose

An LA water pump unresticted on the the outlet cannot flow enough water to collapse a 1-1/2" hose. But remember the outlet is resticted with a thermostat. Meaning the flow in can't be more than the flow out.

Also a cooling system is a pressure system, at 12 - 16psi which is what most radiator caps are it would take a pretty large pump to collapse a suction hose. This is the main reason you do not need a spring.

And anything in the path of flow will restrict flow, a curved hose will flow less than a straight hose because of friction loss. I probably should have used the "could" instead of "can" because it would depend on the situation for it to restrict flow, if at all.

Not one of my vehicles (10) including my drag car have a spring in the lower hose and they do not collapse or have any cooling problems.



Thanks, for the personal attack with the drug smoking thing.
Chuck