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Old 04-16-2018, 10:03 AM   #1
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Pressure regulator & black tank flush.

Just a quick question. If you have a dedicated black tank flush inlet, is it best to feed that with a line that goes thru the pressure regulator, or connect to full pressure from the camp site water supply?

I am planning to use a Y fitting at the camp faucet so I have a 2nd line for washing etc and am thinking I should connect the pressure regulator first, then the Y fitting, then the hoses for fresh water feed and utility feed - would this be the best way?
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Old 04-16-2018, 10:05 AM   #2
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I use both sides of the y after my pressure regulator, set at 55 psi.
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Old 04-16-2018, 10:17 AM   #3
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There seems to be about a 50/50 split of those who do and don't regulate the pressure to the black tank flush.

For me, I'm in the opposite camp as BuzzWolf- my water pressure regulator is hung inside of my water bay so my Y, water hoses, and black tank flushes are unprotected.

Of course, now I'm in a new rig without a water bay- so I'll maybe do it differently.
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Old 04-16-2018, 10:22 AM   #4
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I've found with my last two black tank flushes that it wasn't actually the pressure from the flush that really did the cleaning but rather the ability to fill the black tank (with the flush) and let it 'swoosh' out the debris.

Just be very careful about closing the black tank blade valve with the flush running. Do not get distracted. It will overflow and make a mess.
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Old 04-16-2018, 10:30 AM   #5
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You may want to see how it's plumbed, too. My flush goes into the tank right above the drain, so it's actually pushing stuff AWAY from the drain, not towards it. Arrow is pointing at the flush attachment; drain line is below the arrow.

Great idea, FR.
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Old 04-16-2018, 10:30 AM   #6
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Just be very careful about closing the black tank blade valve with the flush running. Do not get distracted. It will overflow and make a mess.
Or worse and rupture the tank. Friends of mine had that happen.
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Old 04-16-2018, 10:36 AM   #7
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There seems to be about a 50/50 split of those who do and don't regulate the pressure to the black tank flush.

For me, I'm in the opposite camp as BuzzWolf- my water pressure regulator is hung inside of my water bay so my Y, water hoses, and black tank flushes are unprotected.

Of course, now I'm in a new rig without a water bay- so I'll maybe do it differently.
In 9 years of camping, I have used a pressure regulator once, but the pressure was always too low so I stopped using it. If I were to ever use it again, I would hook up the Y first and then the regulator to the city water hose part of the Y. Since I don't have a orig equipment black tank flush system, I instead use a camco flush valve to flush my black tank. It would be counter productive to attach a regulator to that hose!
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Old 04-16-2018, 12:57 PM   #8
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5picker....you're right.....I was within seconds of opening the valve after timing it to the T,,,,,I didn't get to it before my wife pushed the flush pedal. Yup,,,,it made a mess. Thank God it wasn't the initial fill, but a douche....which I always do to keep the tank as clean as possible. Guess who had to clean up the bathroom?
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Old 04-16-2018, 01:20 PM   #9
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I have my outside shower hooked up to the black water tank flush. I always have my pressure regulator hooked up, itís a Watts adjustable regulator. For me itís better to be safe than sorry
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Old 04-16-2018, 01:49 PM   #10
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The instruction manual with my flusher said not to use a pressure regulator at all...use full city pressure. Also, I read an article somewhere in the past cautioning about possible backflow from the black water tank, through the flusher into the hose and possibly causing contamination. I don't know if it's true, but I use a different hose for the flusher and don't use the regulator with the tank flusher.
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Old 04-16-2018, 02:03 PM   #11
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5picker....you're right.....I was within seconds of opening the valve after timing it to the T,,,,,I didn't get to it before my wife pushed the flush pedal. Yup,,,,it made a mess. Thank God it wasn't the initial fill, but a douche....which I always do to keep the tank as clean as possible. Guess who had to clean up the bathroom?
Who cleaned up the wife??
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Old 04-16-2018, 03:21 PM   #12
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Quote:
Originally Posted by Vladivar View Post
Just a quick question. If you have a dedicated black tank flush inlet, is it best to feed that with a line that goes thru the pressure regulator, or connect to full pressure from the camp site water supply?

I am planning to use a Y fitting at the camp faucet so I have a 2nd line for washing etc and am thinking I should connect the pressure regulator first, then the Y fitting, then the hoses for fresh water feed and utility feed - would this be the best way?
Yes, use the pressure regulator as your first connection to the water source. I have the Camco Tornado flush installed on both black & grey tanks and I have heard reports that the spinning nozzles on the units may come flying off into the tanks if you slam too much pressure on them. I always turn them on slowly.

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Old 04-16-2018, 03:45 PM   #13
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Originally Posted by DrLewie View Post
The instruction manual with my flusher said not to use a pressure regulator at all...use full city pressure. Also, I read an article somewhere in the past cautioning about possible backflow from the black water tank, through the flusher into the hose and possibly causing contamination. I don't know if it's true, but I use a different hose for the flusher and don't use the regulator with the tank flusher.
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Old 04-16-2018, 03:54 PM   #14
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Yes, use the pressure regulator as your first connection to the water source. I have the Camco Tornado flush installed on both black & grey tanks and I have heard reports that the spinning nozzles on the units may come flying off into the tanks if you slam too much pressure on them. I always turn them on slowly.

Good Camping
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It appears you have a special case - with the 3rd party Tornado flush. Regular run-of-the-mill flush systems don't have spinning nozzles as far as we know. Therefore, full pressure without a regulator seems to be best for the normal flush systems. As DrLewie said "I use a different hose for the flusher and don't use the regulator with the tank flusher."
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Old 04-16-2018, 05:23 PM   #15
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If she hadn't pushed the pedal...

Quote:
Originally Posted by Grampa Jim View Post
5picker....you're right.....I was within seconds of opening the valve after timing it to the T,,,,,I didn't get to it before my wife pushed the flush pedal. Yup,,,,it made a mess. Thank God it wasn't the initial fill, but a douche....which I always do to keep the tank as clean as possible. Guess who had to clean up the bathroom?
Well, if she hadn't pushed the pedal it would be just like that scene from the great movie "Vacation."
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Old 04-16-2018, 05:27 PM   #16
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Larry,,,,,It MIGHT have been like that.....I was outside when I heard her scream. I guess it WAS like Robin's explosion being as what I saw all over the bathroom. Boy, she was pissed.
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Old 04-16-2018, 05:30 PM   #17
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Use this instead

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Originally Posted by Schvarak View Post
In 9 years of camping, I have used a pressure regulator once, but the pressure was always too low so I stopped using it. If I were to ever use it again, I would hook up the Y first and then the regulator to the city water hose part of the Y. Since I don't have a orig equipment black tank flush system, I instead use a camco flush valve to flush my black tank. It would be counter productive to attach a regulator to that hose!
I've never used a regulator either, but I do carry one of these and have used it from time to time. It screws right onto the standard 3/4" garden hose thread.

Larry
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Old 04-16-2018, 05:33 PM   #18
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Out the vent on the roof

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Larry,,,,,It MIGHT have been like that.....I was outside when I heard her scream. I guess it WAS like Robin's explosion being as what I saw all over the bathroom. Boy, she was pissed.
I was thinking that if the toilet made a good seal, the black water would come shooting out the roof vent, of course.
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Old 04-16-2018, 06:49 PM   #19
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I was always told to use white hose only for potable water. (drinking water) Use a 2nd hose for black tank--washing rv or whatever. They now sell a blue hose for potable water. Standard hoses may give off a chemical. While growing up we always drank from hoses.
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Old 04-16-2018, 07:08 PM   #20
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I was always told to use white hose only for potable water. (drinking water) Use a 2nd hose for black tank--washing rv or whatever. They now sell a blue hose for potable water. Standard hoses may give off a chemical. While growing up we always drank from hoses.
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