Plumbing diagram for a 2020 Momentum 376THS

[skhohl]

Hello, I am looking for a plumbing diagram for a 2020 Momentum 376THS. I have identified most of the plumbing lines but have an extra line running to the back by the bathroom. I have identified the rear outside spray port, the black flush line, toilet, washer, and sink cold. I have 2 cold lines going toward the shower I am unable to identify. One is most certainly the shower cold but I have no idea what the second line is. All the colds tee off from one line coming through the under belly as well as the hot. There is a separate line coming for the black flush and also a 3rd coming through the under belly that goes alongside the hot and cold for the shower which I would like to identify.

Thanks Kenton

[Jlawles2]

Have you identified which is the power fill line for the fresh water tank from the control panel?

[skhohl]

Yes, the fresh tank is up beside the Nautilus system and that line is visible. there are 3 colds (black flush, main feed and powerfill) entering the underbelly but 4 colds coming out the other end which is where the unidentified line is.

Thanks

[howson]

Hello, I am looking for a plumbing diagram for a 2020 Momentum 376THS. I have identified most of the plumbing lines but have an extra line running to the back by the bathroom. I have identified the rear outside spray port, the black flush line, toilet, washer, and sink cold. I have 2 cold lines going toward the shower I am unable to identify. One is most certainly the shower cold but I have no idea what the second line is. All the colds tee off from one line coming through the under belly as well as the hot. There is a separate line coming for the black flush and also a 3rd coming through the under belly that goes alongside the hot and cold for the shower which I would like to identify.

Thanks Kenton

Hi Kenton,
In the area you identify the only thing that I can find is what the 376TH "plan" shows as an optional exterior shower connection. The "outside shower if equipped" is referenced in the Momentum Owner's manual, too. See https://www.granddesignrv.com/sites/...al-Rev0217.pdf

I can't find any reference to an exterior shower on GD's website as an option.

It looks like in the brochure for the 376THS there's an exterior kitchen? Does that have water?

Sorry can't be of more help...might need to ask GD this question.

Howard

[skhohl]

Hello, Thanks for the reply. I have also been able to identify the outside shower (hot and cold) as well as the cold water spray port. The exterior shower is on the Nautilis system and the spray port is run off the main cold feed. I have tried to upload a photo. There is a cold feed that everything taps off for the RV. There are 3 blue Pex pipes coming from below. The main feed supplies the washer and shower in this picture. The Pex with the black line is the black flush but I cant figure out what the 3rd Pex is... Its the one that runs alongside the hot and cold to the shower

Kenton

[skhohl]

I have also sent an email to GD but have not received a response. I will wait for a response from them. The exterior kitchen is not supplied with water

Thanks again

[howson]

skhohl -- dang, I'm stumped. Looked at every resource I have available to me and I can't figure it out. When GD responds please update this thread with the results.

[skhohl]

Will do.

Thanks for your help

[skhohl]

Still no response from GD

Kenton

[howson]

Still no response from GD

I'll send a request to our Momentum rep to see if I can get a status on your email and question.

Howard

[howson]

Still no response from GD

Kenton

Kenton,
I checked with a source at GD and there's no record of your email. I'm sending you a PM with information. Please reply by PM so I know you got this message.

Howard

[skhohl]

Will do

Thanks

[Cook]

Will do

Thanks

Hi Kenton,

Did you ever get an answer? I found the line you are mentioning today going up the shower wall then back down to the black tank for flushing. I am guessing GD runs the line up the shower then back to the tank to keep it warm but that is just a guess. I am in the process of replacing all rubber hoses to pex and this one is impossible to access if I keep the line running like it is.

Thx. Marc

[Country Campers]

Hi Kenton,

Did you ever get an answer? I found the line you are mentioning today going up the shower wall then back down to the black tank for flushing. I am guessing GD runs the line up the shower then back to the tank to keep it warm but that is just a guess. I am in the process of replacing all rubber hoses to pex and this one is impossible to access if I keep the line running like it is.

Thx. Marc

The black line that goes up to the shower wall is for the black tank flush line. The reason that it goes in this route is so the black tank flush valve and check valve is above the rim of the toilet, built for code. It is not in this position to keep warm. If you remove the shower control you should see the valve and the black line.

Welcome to the Forum and please have a read of our Welcome Letter to New Members

Brian

[Cook]

Thanks for taking the time Brian. This is extremely helpful.