Random Atom 4 question…

[Atlarge]

Can anyone tell me where the top tube on the atom4 water expansion tank goes?

[IanG]

It should just be a vent pipe
It should just go to the floor as a bleed
Ian

[John Scherrer]

As this is a pressurised expansion tank (the blue cap is pressurised) and not an overflow tank, surely that upper pipe can't be vented to air?

I think it's an input pipe from the thermostat housing area. If the temperature gets too high and the water expands, it goes into the expansion tank via that hose. When the temps cool down, the water is draw back into the system by vacuum via the tank's bottom hose (which you cannot see in that photo)

Disclaimer - I don't have a '4' !

[Atlarge]

Thanks for the replies, I don’t have a 4 either but wondered what it could be for as the main coolant pipe should connect at the bottom. On the 3 the top hose part is blocked (on mine at least) so I wondered where it went on the 4!

Cheers!

[abcoro]

On mine it’s just closed/terminated with closed hose.

[Atlarge]

[mention]abcoro[/mention] - Thanks for the insight, I wondered where the random hose on the Ariel pic was connecting to..... your setup is closer to mine on the 3 with the upper port blanked off. Maybe it's related to an optional extra on the 4?

Cheers!

[speedmachine]

@abcoro - Thanks for the insight, I wondered where the random hose on the Ariel pic was connecting to..... your setup is closer to mine on the 3 with the upper port blanked off. Maybe it's related to an optional extra on the 4?

Cheers!

Its just an early picture i think