This is because air is constantly flowing through the radiator therefore cooling it the hose will normally be hot or warm.
the pressure is hot water ,if it is air you have a head gasket problem.check your oil if its milky or foamy brown have it repaired ,or engine will be ruined.
A portable air conditioner hose kit typically includes a hose, window adapter, and connectors to help vent hot air outside.
A flexible exhaust hose is required for a portable AC unit to effectively vent hot air outside.
if it is a braided hose, it just deteriorated due to age.
I don't know if this is what your looking for but, you can attach your hose to your hot water connection to your washer. the water won't come out scorching hot.
Your garden hose acts the same as a solar collector. The sun shines on the hose which heats up and in turn heats the water inside it. You may see some houses that have solar hot water panels on their roof. They have pipes that run to and from them. The sun warms up the water that is passing through them and sends it to the hot water heater in the house. Since the water is already warm or even hot, the tank does not have to use as much energy to heat it. The darker your hose the more energy from the sun it will absorb making the water hotter.
Lower radiator hoses in water cooled engines are return lines. The upper radiator hoses are feed lines of hot engine water to the radiator. The reason that lower hoses are cooler is that the radiator has allowed much of the water's heat to dissipate into the air. Thus, a lower radiator hose contains cooler water than other radiator and heater hose lines.
ONE OF THE HOSE WAS BROKEN AND NO ANTI-FREZEE
There is no valve, it is probably clogged up.
The temperature of hot water from a hose in the sun can vary depending on factors like the amount of time the water has been exposed to sunlight, the ambient temperature, and the initial temperature of the water. It's generally not recommended to use hot water from a hose in direct sunlight as the temperature can potentially reach levels that can cause burns.
It is probably sediment from the hot water heater, you may need to flush out the hot water heater tank, all it takes is a garden hose.