What are these for?

[Canyonlight]

The 295 has been in production since at least 2019....or are you referring to the use of the 2 pex lines I referred to in my post?

Yes, the 2 pex lines....Thank you !

Dan

[luvmyrv]

Yes, the 2 pex lines....Thank you !

Dan

OK..gotcha! Unfortunately the trailer is away in storage now so unable to take a pic, but basically it's the same as pics in previous posts with the pex tube right next to fresh water drain, except it has 2 tubes side by side, same length.
I am trying to understand the 2 tube concept...is it simply that a vacuum can't be created since the 2nd tube provides air intake?

[Saxles]

OK..gotcha! Unfortunately the trailer is away in storage now so unable to take a pic, but basically it's the same as pics in previous posts with the pex tube right next to fresh water drain, except it has 2 tubes side by side, same length.
I am trying to understand the 2 tube concept...is it simply that a vacuum can't be created since the 2nd tube provides air intake?

Yes, that is exactly the reason for the two lines although my understanding is that they needed to be different lengths to work.
I retrofitted my 2018 to this system and it really does stop any siphoning. It will not stop any water from sloshing out while travelling however. I put valves on both my lines to stop that.

[Scott'n'Wendy]

@Keebler

Thanks, I try my best. Lots of years in construction and the old back ain't what it use to be... some of these mods are a necessary evil.

@IBEW Sparky Speaking of construction...do I spy cantruss there? From a fellow IBEW (Canada) member.

[IBEW Sparky]

@IBEW Sparky Speaking of construction...do I spy cantruss there? From a fellow IBEW (Canada) member.

I'm not familiar with the term "cantruss"? Are you referring to the aluminum unistrut? I love the versatility of making/mounting things with unistrut. Aluminum, fiberglass, or stainless steel are best for little projects like this... galvanized steel where strength is needed. I try and avoid the green painted stuff unless it's inside and never gonna see any moisture.

[luvmyrv]

Yes, that is exactly the reason for the two lines although my understanding is that they needed to be different lengths to work.
I retrofitted my 2018 to this system and it really does stop any siphoning. It will not stop any water from sloshing out while travelling however. I put valves on both my lines to stop that.

If you installed valves, I suppose you have to leave the one for fresh air intake open all the time otherwise it can't do it's job?

[gbkims]

I'm not familiar with the term "cantruss"? Are you referring to the aluminum unistrut? I love the versatility of making/mounting things with unistrut. Aluminum, fiberglass, or stainless steel are best for little projects like this... galvanized steel where strength is needed. I try and avoid the green painted stuff unless it's inside and never gonna see any moisture.

Same, I hadn't heard of Cantruss before.
I mostly used B-Line & Unistrut. Aluminum & Stainless were my favorite, but pricey, & HDG that had the thicker layer.

Cantruss - I had to look it up:
Based on THOMAS & BETTS INTERNATIONAL, INC.(a Delaware Cor, the CANTRUSS trademark is used in the following business: Cable trays and components of a metal framing system used as supporting structure for electrical equipment such as cable trays, conduits, busducts, lighting fixtures, and the like. , Components of metal supporting and framing structures for mechanical devices, pipelines, water mains, sewage mains and the like.

[Scott'n'Wendy]

Ya, in my area (North Western Ontario) uni-strut was commonly called cantruss (regardless of brand) when I was an apprentice in the late '80's. Some of us still use it. Now it's usually just called deep or shallow strut.

[wfsdno]

So... best way to winterize... drain using the 2 lines (plus hot water) or use the pink rv gallon jugs and the 12v pump?