Eberspacher exhaust

[Graham_Wright]

Is there any reason I cannot use copper?

 

[pvb]

Corrosion perhaps? I'd use flexible stainless.

 

[Graham_Wright]

Corrosion perhaps? I'd use flexible stainless.

You know I'm impoverished!
I have a considerable quantity of 30mm diameter copper. Could be deemed sacrificial!
Why is the exhaust supposed to be lagged if there is no contact risk?

 

[Minchsailor]

If you do use copper, do NOT use soldered joints, they will melt:

Carbon monoxide poisoning on motor cruiser Arniston with loss of 2 lives

 

[Graham_Wright]

If there is no other reason for not, I will silver solder.
I could also use stainless tube I guess but it is only 1".

 

[pvb]

You know I'm impoverished!
I have a considerable quantity of 30mm diameter copper. Could be deemed sacrificial!
Why is the exhaust supposed to be lagged if there is no contact risk?

Lagging minimises condensation of the exhaust gas in the pipe, and also protects against heat damage to the boat or contents.

 

[pvb]

I could also use stainless tube I guess but it is only 1".

That's the size of the exhaust outlet on the Eberspacher, isn't it?

Edit: I have some unused 24mm flexible stainless exhaust hose if you're interested...

 

[Graham376]

Is there any reason I cannot use copper?

Even heating and cooling will expand and contract the exhaust pipe and there may well be movement between the heater and skin fitting, causing failure. I would stick with flexible exhaust, it's used for a reason.

 

[Graham_Wright]

I note that the fixing plate through which the fixing screws, air inlet, fuel inlet and exhaust outlet pass is fitted with a rubber(?) gasket.
This implies that a "rubber" hose could be utilised.
My post has turned into a "curiosity" topic. Why is the exhaust insulated if it passes through free space? Why not let the exhaust pipe contribute to the overall heating?
My exhaust will point upwards into free air and the mechanical fixings will be flexible. After reading the various contentious dos and don'ts, I will use elbows and a tee with a small diameter perforation pointing downwards to catch the condensate. If this is aggressive, it would seem prudent to arrange a container to save the bilge.

 

[Graham_Wright]

That's the size of the exhaust outlet on the Eberspacher, isn't it?

Edit: I have some unused 24mm flexible stainless exhaust hose if you're interested...

Thanks for the offer;- please p.m. me with a price.
The heater is a D4 for which I made a sleeve to match the Ø30 copper during trialling. I though the exhaust outer was Ø26 but the instructions say otherwise. I need to check on next visit.
However, I also have a D5 water heater and that does have a Ø24 outlet.