What is the benefit of this hose?

[Pat]

I'm freshening up the '40's cooling system and a friend suggested I use a Hump Coupler Hose. Realizing that my first inkling that this was some sort of sex toy was probably a function of an old dirty mind, I looked one up in a catalogue.
Does anyone know what if any, benefits these provide?

 

[Jack]

I've seen them used for intercoolers, intakes and where a hose may tend to slip
(allows a little bending to occur). Not aware of any used in a cooling system though.

 

[Scott Calabro]

Looks to me like those hoses would allow a small amount of movement where two coolant pipes are connected during a heating/cooling cycle. Would definitely be a good idea where the forward coolant pipes interface with the radiator inlet and outlet stubs.

 

[Bill Musarra]

They are for joining two pipes where one has a tendency to move and the other is fixed. The pipes on an engine will move with the torque of the engine. The radiators are fixed in their position. The coupler absorbs that movment(that is the advantage).

Bill

 

[Pat]

Thanks Bill. Given that the CAV SS water plumbing is bolted to the MONO and the radiator is rubber mounted, it may be a good idea to use them there. I've read elsewhere that some have had radiator leakage due to too rigid a mounting. So far, the cooling system on the CAV (once I had the right thermostat in it) has been trouble free.

 

[Steve Wood (PANAVIA)]

From a water flow point of view-- they might also allow a lesser restriction for coolant movement as they have a space for the water to alter / change directions.

If you decide to use them, don't forget the special clamps they sell for these, as some older types of hose clamps can slice the silicone hose inadvertently and lead to leaks.

Be sure to get them from a trusted vendor as we have seen some cheap ones that do not hold up to temps.

 

[Robert May Eng.]

These are bellow`s , similar things are used in commercial pipework as a cushion between fixed pipework . Rubber Expansion Bellow - Rubber Bellows, Rubber Expansion Bellow Manufacturer, Rubber Bellows Supplier from Delhi, India

Steel pipe will expand roughly 1mm in length per mtr @ 100 celc. It sounds like a small amount but take the fixed pipes that run front to back on a 40 and that is a few milimeters tugging on the radiator connections. I think they are a good idea.

Bob

 

[David]

Robert has the best reason. They are made to absorb expansion.