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Old 01-08-2017, 11:45 PM   #1
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How do you use black water tank flush?

Just purchased a 251RKS this week and the only thing I don't understand is the black water tank flush. There is nothing in my papers about this so I guess we just hook up a water hose, open the black water tank valve and flush?

Question is for how long and is that it?

thanks . . . .
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Old 01-09-2017, 12:30 AM   #2
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Never mind - found what I needed
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Old 01-09-2017, 01:45 AM   #3
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something to think about

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Originally Posted by Hudgen View Post
Just purchased a 251RKS this week and the only thing I don't understand is the black water tank flush. There is nothing in my papers about this so I guess we just hook up a water hose, open the black water tank valve and flush?

Question is for how long and is that it?

thanks . . . .
if your tank flush unit is mounted into your tank on the street side, as most if not all are, consider this: ... it is mounted on the drain side, probably just above the drain valve(that's where mine is), ... the flush unit sprays water into the tank, so, IF you "spray while draining", you are spraying water into/against the flow of water and solids trying to flow out the drain, ... thus hindering that flow, ...

for a long time, I assumed the flush unit would be mounted on the curb side of the tank and over there would actually be spraying in the direction to help push the stuff towards the drain, but that's not the case, .... our first two trailers didn't come with a factory flush unit so I installed an after market tank flush system, the "quickie flush", on both and mounted them on the curb side because to me that is where it should be installed, trailer #3 came with the flush unit installed and I thought that was going to be great, ..... I used it the same way until I discovered it's mounted just above the drain valve on the street side of the tank, ... now I spray as much as I want to spray and then turn off the spray before opening the dump valve, I then open the dump valve and let the tank dump without spraying water into that flow trying to leave the tank, ...

you will need to search to find where the unit is installed into the tank, but more than likely it is on the street/drain side,...... its easier for FR to put it there, than to run a line over to the curb side and it does work from there , it just works better if you don't spray while dumping, ......
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Old 01-09-2017, 04:35 AM   #4
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Never mind - found what I needed
I would recommend a "Clear 45Deg elbow "on the discharge,just before the hose! Seeing is Beliving! Youroo! !
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Old 01-09-2017, 07:22 AM   #5
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I have learned that my black tank is NOT empty after simply opening the black valve and letting it drain. I have a clear elbow. First I drain the tank. Then I close it. Then I run the tank flush until it is about 1/2 full (I have a 36 gal black tank). Then I drain it. I do this two or three times. That seems to clear the sensors and get the bulk of the material out.

Marty
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Old 01-09-2017, 01:46 PM   #6
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Black Tank Flush Problems

Teaman here.

Have been meaning to ask sort of similar question. My Black tank may not be flushing properly. I had a strong suspicion something was amiss and recently ordered a clear 45 degree adapter for the drain, to enable observation of the cleaning progress. Sure enough, the Flush sprayer gadget seems to be clogged or not installed correctly. Only a tiny trickle of water is flowing thru the clear adapter while trying to use the flush. The water hose is connected and the faucet turned full on.

Any ideas anybody. Is this flush gadget accessible or even repairable???

I have only owned this 2013 Sunseeker for about six months and am still working the 'bugs' out.

Will appreciate any tips.

Thanks
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Old 01-09-2017, 02:28 PM   #7
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I would be very careful running the black tank flush with the dump valve closed. You are introducing water into the tank at a fairly high rate. If you have a clogged or partially clogged or malfunctioning vent, you could get black tank contents where you don't want them or damage the tank.
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Old 01-09-2017, 02:30 PM   #8
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A note of caution. Don't use your fresh water hose for the tank flusher. Most rigs don't have a check valve on the flusher inlet so its possible for some black water to back up into the hose. I carry a separate hose which I only use for the flusher. Those collapsible compact hoses work great for this and don't take up a lot of space.
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Old 01-09-2017, 02:33 PM   #9
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A note of caution. Don't use your fresh water hose for the tank flusher. Most rigs don't have a check valve on the flusher inlet so its possible for some black water to back up into the hose. I carry a separate hose which I only use for the flusher. Those collapsible compact hoses work great for this and don't take up a lot of space.
X2.

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Old 01-09-2017, 03:33 PM   #10
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My black water flush is on the street side. Do I still need to use the knock down pressure gizmo during the flushing of the black tank or do I need to remove the water pressure regulator for higher pressure for flushing the black tank???
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