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Old 07-22-2019, 01:36 PM   #1
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NEW 25 FKS owner - Black Tank Flush?

Hello all... first post, and my first travel trailer!

Im actually loving it as we learn along the way. Recently just returned from Yosemite National Park and have a question about FLUSHING the Black Tank: HOW DO YOU DO IT?

Is there a connection for a Black Tank Flush on the 25 FKS, if not whats the best way to flush the tank

thanks in advance!
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Old 07-22-2019, 01:51 PM   #2
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Do a search on the topic. Lots of people manage this in different ways.

If you have a BT flush it should be labeled on your rig.
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Old 07-22-2019, 01:57 PM   #3
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Originally Posted by gbaldwin View Post
Do a search on the topic. Lots of people manage this in different ways.

If you have a BT flush it should be labeled on your rig.
thanks, thats why I decided to ask. I did NOT see one on the Trailer. Just the Antifreeze Inlet. I scoured youtube looking for anything and various trailers had the black tank flush but Im wondering if it was an "option" I needed to added to add when the trailer was built.
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Old 07-22-2019, 01:58 PM   #4
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Welcome... 1st post.

There are many posts on black tank flushing and maintenance

The first stop will be the Library section.

Here is a link... FRF LIBRARY

Next would be a search. here is one such search link...
Black Tank Flushing

Did you buy this unit new?

This (and many other R/V 101 items) should have been part of your PDI/Customer Orientation.
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Old 07-22-2019, 02:04 PM   #5
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Originally Posted by WA_25FKS View Post
thanks, thats why I decided to ask. I did NOT see one on the Trailer. Just the Antifreeze Inlet. I scoured youtube looking for anything and various trailers had the black tank flush but Im wondering if it was an "option" I needed to added to add when the trailer was built.
It will look just like a city water connection but labeled Black Tank Flush.

If you dont have one, a hose down the toilet accomplishes about the same.

Type in search box above...Black tank flush cleaning
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Old 07-22-2019, 02:13 PM   #6
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Originally Posted by 5picker View Post
Welcome... 1st post.

There are many posts on black tank flushing and maintenance

The first stop will be the Library section.

Here is a link... FRF LIBRARY

Next would be a search. here is one such search link...
Black Tank Flushing

Did you buy this unit new?

This (and many other R/V 101 items) should have been part of your PDI/Customer Orientation.
yes, brand new this March, it was not discussed in the orientation.
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Old 07-22-2019, 04:37 PM   #7
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On my Rpod it looks like this


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Old 07-22-2019, 04:58 PM   #8
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Originally Posted by Riverbc View Post
On my Rpod it looks like this


Attachment 210546
thanks for the pic. Ive looked for a black tank flush port and we just don't have one on the trailer. I did receive some great info and product recommendations that should alleviate the problems
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Old 07-22-2019, 05:07 PM   #9
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From pictures of new 25fks it looks like the black tank flush is on the back of the trailer, either next to your fresh water inlet or on opposite side where if you have a ladder factory mounted it is behind the ladder. Every picture I try looking at is blurry, but you should have Fresh water inlet, city water inlet, anti freeze inlet and black tank flush all on the rear of the trailer.
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Old 07-23-2019, 11:21 AM   #10
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thanks MT Biker, I'll take a look. Its hard to look up as they are all slightly different. I'll let you know what I find out
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Old 07-23-2019, 11:33 AM   #11
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https://www.amazon.com/dp/B0006IX7YC...v_ov_lig_dp_it

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Old 07-23-2019, 02:48 PM   #12
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I have a 2017 25 FKS. The black tank flush fitting is on the drivers side ( same side as the slide) just above where the power cord hooks up.
It is in a great spot. Very convenient when dumping the tanks. I dump the black tank first, then hook a water hose to the black tank flush fitting and let it run for 15 minutes if time and traffic allows. Then I dump the two gray water tanks last.
This process works great for me. No odor in the trailer ever from the black tank.
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Old 07-23-2019, 03:16 PM   #13
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black tank flush inlet

Quote:
Originally Posted by WA_25FKS View Post
Hello all... first post, and my first travel trailer!

Im actually loving it as we learn along the way. Recently just returned from Yosemite National Park and have a question about FLUSHING the Black Tank: HOW DO YOU DO IT?

Is there a connection for a Black Tank Flush on the 25 FKS, if not whats the best way to flush the tank

thanks in advance!
On our 25FKS it's on the driver side of the trailer, above the power inlet. It doesn't say black tank flush but has a sign under it that says Caution Do not use the tank flush valves unless the fullway termination valve is in the open position. I'll send a picture.
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Old 07-23-2019, 03:20 PM   #14
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On our 25FKS it's on the driver side of the trailer, above the power inlet. It doesn't say black tank flush but has a sign under it that says Caution Do not use the tank flush valves unless the fullway termination valve is in the open position. I'll send a picture.
Here's a picture turned sideways - sorry
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Old 07-23-2019, 03:43 PM   #15
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I was looking at pics of a 2020 model. If you just received yours I assume this is what you have.
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Old 07-23-2019, 09:51 PM   #16
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Greetings. Look on the passenger side of the trailer for the black tank flush. We have a 2020 Rockwood 2608BS and it is on the passenger side of our trailer under the television mount.
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Old 09-19-2019, 05:29 PM   #17
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What is Fullway Termination Valve?

Quote:
Originally Posted by Alabama Potter View Post
On our 25FKS it's on the driver side of the trailer, above the power inlet. It doesn't say black tank flush but has a sign under it that says Caution Do not use the tank flush valves unless the fullway termination valve is in the open position. I'll send a picture.
I have the same label near my black tank flush, and I have no idea what a "fullway termination valve" is, or where it might be located on my 2304DS.

Can anyone help?
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Old 09-19-2019, 05:49 PM   #18
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Quote:
Originally Posted by Paul Dershem View Post
I have the same label near my black tank flush, and I have no idea what a "fullway termination valve" is, or where it might be located on my 2304DS.

Can anyone help?
Ah yes the dreaded Fullway Termination Valve
That is what the slide gate valve is called that you open to dump the tank.
Now lets all chip in and warn about what happens if you run the black tank rinse with the fullway termination valve closed.
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Old 09-19-2019, 05:52 PM   #19
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Quote:
Originally Posted by Paul Dershem View Post
I have the same label near my black tank flush, and I have no idea what a "fullway termination valve" is, or where it might be located on my 2304DS.

Can anyone help?
It is nothing more than the black/grey/galley dump valve(s).

The 'industry' calls them fullway termination valves.
R/Vers call them dump valves.
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Old 09-20-2019, 10:51 AM   #20
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This video shows you exactly where it is. Jump to the 4:15 minute mark to cut to the case. I've also attached a picture. Oddly it is not labeled clearly as the BTF connection on the unit showcased here which I'm sure confuses a lot of people. Video.
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