Where does this loose hose go?

[Chirider]

Recently bought a 2007 280 Sundancer and going through it for Spring and learning the ropes! Photo shows the Atwood heater with heat exchange and there is a big black rubber hose not connected. Is this taken off for winter storage? Common sense told me that It should be connected down to the black male connector. Is that correct? The hose isn’t long enough so I’m having doubts. What is this black hose? I traced it and I think it goes to the outside of the boat? Thanks from a newbie!

 

[Stee6043]

I'd be willing to bet you could download the owners manuals for your boat from Sea Ray. There should be....might me....a diagram in the manual showing the routing?

Did you not sea trial this beauty? Seems like de-winterization should have been a part of your purchase agreement??

 

[quality time]

It's for the pressure relief valve (the fitting next to the hose with the flip handle on the end). The barb is pointing down next to the blue hose and just needs reconnected.

 

[JimG]

+1 on the pop-off valve (another name for it) drain.

Obviously your hot water heat exchange is not hooked up either.

 

[b_arrington]

The black barb next to the blue hose is for hot water from the engine for the heat exchanger. This circulates hot engine cooling water through the heat exchanger in the water heater. There should be another one near the red hose and the drain valve. As JimG said, the one in the photo it's not connected. Since it's not connected, the only way to heat the water is via AC power.

I would also look at where the engine water hoses are - are they capped off or just loose? If loose you're going to pump water or antifreeze into your boat at startup. I'm not sure why you would disconnect the heat exchanger hoses. I've never taken mine off, but I do have a closed cooling system.

Sorry if I'll tell you something you know.

 

[Strecker25]

Maybe it's different on the newer models but we don't have the engine hoses going to the water heater because we have a generator. I think the logic was if you have AC power by way of genset you will use it, as I've looked at non-genny versions of our boat and they did have the engine hoses. I've thought about adding it, as we don't use the generator all the time.

Just wanted to mention it because I see the OP has the genset

 

[bbwhitejr]

That hose is the hot water circulation through the HWH to heat it while running.

We had a gen in our 2006 260DA and had the hoses from the engine to the HWH as well. The coil inside the HWH gets plugged very easily especially in SW. The nipple where the hose connects to on ours was lose one day and when I went to tighten the clamp, the nipple fell off. It was plugged solid inside. I just made a short hose to connect the two barbs on the engine and removed the hoses from the HWH. The only fix was to replace the HWH and it worked fine on 110v so we never did.
Bennett