PLEASE HELP 2021 White Hawk 32RL

[WindowMan]

Per my manual, my two gray tanks have different capacities. The primary is listed as 30.5 gallons and the secondary is listed as 42 gallons. One tank is for the kitchen sink and the other tank is for the bathroom shower and sink. I know which tank indicator on the Jaycommand screen on the inside is for each tank and I know which dump handle on the exterior operates which tank. My question is, does anyone know which tank is my primary tank and which one is the secondary?
I can figure it out by using my gallon usage meter by filling one of the tanks by watching the indicator on my phone and just watch which one fills first on the screen but I wanted to check with my forum friends first before wasting another 30 gallons of clean water. Thanks for any help!

[rccs]

Wye would you need to fill the tank to full? If your tanks are empty just put about 10 gallons or less in one of the tank and see which one is showing some in the tank on the indicators. One of them should show at least 1/4 full.

[Jayhawk 29]

I have two grey water tanks similar to your setup. My sink tank registers almost when I use my sink water after fully dumping. My bathroom tank sensor takes a lot for it to show any indicator light . I have concluded, not scientifically though two things, one being that possibly the tank angle in the underbelly has a different angle as it relates to the location of the sensors.

Another one being that the fill is located in a different area too combined with mounting of the tanks. With two different sized tanks, the same amount of water has a different height from the bottom inside.

[JKyle]

Originally Posted by WindowMan

Per my manual, my two gray tanks have different capacities. The primary is listed as 30.5 gallons and the secondary is listed as 42 gallons. One tank is for the kitchen sink and the other tank is for the bathroom shower and sink. I know which tank indicator on the Jaycommand screen on the inside is for each tank and I know which dump handle on the exterior operates which tank. My question is, does anyone know which tank is my primary tank and which one is the secondary?
I can figure it out by using my gallon usage meter by filling one of the tanks by watching the indicator on my phone and just watch which one fills first on the screen but I wanted to check with my forum friends first before wasting another 30 gallons of clean water. Thanks for any help!

I have the two gray tanks as well, BUT both are plumbed to a single sewer outlet (with black.) One is not 'primary.' Kitchen dumps to a 30.5 gal tank and the bathroom is what I believe to be the same exact size/shape, 30.5 gal tank. (on my unit with a separate valve for the kitchen) I keep that kitchen valve closed and it will hold its water separate from the bathroom sink and shower tank. I keep it closed because I know my kitchen gray usage will not be greater than my bathroom gray usage and I do not need the kitchen water filling my bathroom gray, prematurely. If it were reversed, I might do it differently.

If I open the gray valve for the kitchen, it will eventually share the total capacity of both tanks. Depending on the run/camper level etc, gray water will run one way or the other, filling one tank faster than the other OR if perfectly level, will fill equally, until one is full, then spills over into the plumbing toward the other gray tank. Neither acts as primary or secondary. If the gate valve between them is kept open, they'll just eventually share gray water. As one tank becomes more full, it will spill over into the other tank.

If you have TWO gray valves BUT a single sewer outlet, your gray tanks share a connection between them. If you have TWO sewer outlets, the tanks are not connected and stand alone in their water capacities.

[WindowMan]

rccs...
Simply putting in a few gallons of water in will not tell me which of the tanks is 30 gallons and which is 42 gallons. Your suggestion will only tell me which one I have put water in, not the capacity of that tank. I use a Rhino Blaster Pro RV Tank Rinser after each camping trip. This product suggests that you fill each tank to capacity then dump, this creates a suction when dumping therefore doing a much better job at keeping the sensors clean and simply cleaning the tank. Trying to put 42 gallons of water in a 30 gallon tank will not have a good outcome.

[WindowMan]

JKyle and Jayhawk 29...
Thanks for your input. Both gray tank valve handles are "side by side" and our rig has an enclosed underbelly. I have put 5-10 gallons of water in the kitchen sink and water will only come out of one of the valves. I put the same amount of water in the bathroom sink and shower and water will only come out of the other dump valve. So I am assuming that the tanks are not connected, but I could be wrong.

[JKyle]

Originally Posted by WindowMan

JKyle and Jayhawk 29...
Thanks for your input. Both gray tank valve handles are "side by side" and our rig has an enclosed underbelly. I have put 5-10 gallons of water in the kitchen sink and water will only come out of one of the valves. I put the same amount of water in the bathroom sink and shower and water will only come out of the other dump valve. So I am assuming that the tanks are not connected, but I could be wrong.

You likely won't see spillover/sharing until one of the tanks if full and you try to add more to it. Even then, you won't 'see' it unless you know exactly how much water you've put into one or the other, in order to gauge how much has spilled to the less empty tank.

IF you only have one sewer opening, your tanks are connected. They have to be...they share the same exit line at some point in the plumbing.

[WindowMan]

Originally Posted by JKyle

You likely won't see spillover/sharing until one of the tanks if full and you try to add more to it. Even then, you won't 'see' it unless you know exactly how much water you've put into one or the other, in order to gauge how much has spilled to the less empty tank.

IF you only have one sewer opening, your tanks are connected. They have to be...they share the same exit line at some point in the plumbing.

JKyle...
Thanks again for your input. We are somewhat newbies to the RV community, (about 18 months), so I am still learning a lot from the veterans on this site. I only have one dump hookup for all three tanks (black/gray/gray). As I mentioned, our unit has an enclosed underbelly so I can't see anything past this one hookup fixture without removing the enclosure material. What you are saying makes complete sense. To confirm that the two tanks are connected, after I dump both gray tanks and all water has drained, I could open only one gray dump valve, use the Rhino Blaster Pro and send up 30 gallons of water into the tank. When my gauge reaches 30 gallons (which is the capacity of the smaller of the two tanks), I could close that valve that I had open when filling with water, then open the other tank and see if water comes out. If it does, that would confirm the tanks are connected. Is my thinking correct in this? With this being said, do you think I would be safe if when after a camping trip, open both gray valves, make sure the black is valve is closed and using the Rhine Blaster, send up about 70 +/- gallons of water (which is the total capacity of both tanks) then dump both? Do you think I would be safe doing that, provided I watched the interior drains and vent pipes making sure I don't overfill?
Thanks again for your help!

[Jayhawk 29]

A point of note that needs to be said, if you open both valves so that the two tanks can possibly equalize and with the end dump cap on the single dump outlet, even when you close the grey water valves and get ready to dump and remove your single dump cap, you will get a hand and possibly a face full of "seasoned water" on you thats laying in the pipe. .

[JKyle]

Originally Posted by WindowMan

JKyle...
Thanks again for your input. We are somewhat newbies to the RV community, (about 18 months), so I am still learning a lot from the veterans on this site. I only have one dump hookup for all three tanks (black/gray/gray). As I mentioned, our unit has an enclosed underbelly so I can't see anything past this one hookup fixture without removing the enclosure material. What you are saying makes complete sense. To confirm that the two tanks are connected, after I dump both gray tanks and all water has drained, I could open only one gray dump valve, use the Rhino Blaster Pro and send up 30 gallons of water into the tank. When my gauge reaches 30 gallons (which is the capacity of the smaller of the two tanks), I could close that valve that I had open when filling with water, then open the other tank and see if water comes out. If it does, that would confirm the tanks are connected. Is my thinking correct in this? With this being said, do you think I would be safe if when after a camping trip, open both gray valves, make sure the black is valve is closed and using the Rhine Blaster, send up about 70 +/- gallons of water (which is the total capacity of both tanks) then dump both? Do you think I would be safe doing that, provided I watched the interior drains and vent pipes making sure I don't overfill?
Thanks again for your help!

In theory, you'd have to fill beyond the capacity of the first tank, in order to have it overfill into the other tank.

I have to ask, why are you trying to fill your gray tanks?
Are you doing this as an exercise...trying to clean them...what is your reason behind what you are doing?

[JKyle]

Originally Posted by Jayhawk 29

A point of note that needs to be said, if you open both valves so that the two tanks can possibly equalize and with the end dump cap on the single dump outlet, even when you close the grey water valves and get ready to dump and remove your single dump cap, you will get a hand and possibly a face full of "seasoned water" on you thats laying in the pipe. .

RIGHT! That gray water will have flowed beyond both tanks, into the plumbing that leads to exit cap. I'd suggest a secondary (twist on) gate valve. I have one and I love the convenience and cleanliness it lends.

Still, I am confused as to the purpose of filling the gray tanks. If you want them full to rinse/clean, run the faucets to fill them.

[WindowMan]

Originally Posted by JKyle

RIGHT! That gray water will have flowed beyond both tanks, into the plumbing that leads to exit cap. I'd suggest a secondary (twist on) gate valve. I have one and I love the convenience and cleanliness it lends.

Still, I am confused as to the purpose of filling the gray tanks. If you want them full to rinse/clean, run the faucets to fill them.

For about a year or so, when setting up camp, I've been using the Rhino Blast Pro (link attached below) as basically a secondary gate valve. It's the first think I hook up. It twists onto the exit cap then your sewer hoses hook to this and go to the dump or in-ground sewer hookup. It allows you to dump your tanks as normal. During takedown before leaving camp, AFTER all three tanks have been dumped and AFTER I have used the RV's built in black tank rinse process, I unhook the tank rinse garden hose and hook it to the Rhino Blaster Pro, with a digital gallon counter (link below) and fill all three tanks (one at a time) to complete capacity, then dump. Doing this creates a vacuum in the each tank (when filled completely) that does an extremely good job at cleaning each tank and cleaning tank sensors. The Rhino Blaster Pro has a built in backflow valve that prevents any contaminants from coming back into the garden hose or the campsite water supply, so I always hook the garden hose directly to the campsite water supply. Since beginning this process about year ago, my tank sensors in all three tanks are always accurate. Yes, I could accomplish the same by just running water inside the RV into the drains, but it is MUCH quicker using this method and I don't have to guess when the tanks are full or bother the wife to keep a "watch out" which she is doing her breakdown process on the inside. You do it all from the outside from the same place, (easy peasy). Just have to make sure to watch the gallon counter and not overfill the tanks. This is why I wanted to know the capacity of each tank and which one was larger than the other. I actually figured the tank capacities out yesterday while doing this process while in storage and now I have it dialed in. I printed out my process and tank capacities with locations on a sheet of paper and taped it inside the basement storage area so all of the information is now right in front of me. I'm sorry for the long explanation but I wanted to make sure I fully explained. Thanks again for your input.




https://www.amazon.com/Camco-Blaster...05&sr=1-4&th=1


https://www.amazon.com/Measure-Consu...1611125&sr=8-1

[JKyle]

okay, I see. That tank valve with the water port is handy.

I looked at it when considering a a secondary valve. I opted to just go with the single twist on valve. I keep it in place all the time. I don't do (so far) any full hook-up camping. I use my black tank flush, then fill the tank about 3/4 a couple times, when at the dump station. (if time allows.) I use Klein Tank's recipe in the tank, too. I'll leave some water in the tanks along with a fresh dose of the recipe, in all 3 tanks, for the ride home.

Okay, so you've got your figures all noted, now. Great.

[WindowMan]

Originally Posted by JKyle

okay, I see. That tank valve with the water port is handy.

I looked at it when considering a a secondary valve. I opted to just go with the single twist on valve. I keep it in place all the time. I don't do (so far) any full hook-up camping. I use my black tank flush, then fill the tank about 3/4 a couple times, when at the dump station. (if time allows.) I use Klein Tank's recipe in the tank, too. I'll leave some water in the tanks along with a fresh dose of the recipe, in all 3 tanks, for the ride home.

Okay, so you've got your figures all noted, now. Great.

Funny...
We use the Kleen Tank recipe as well same as you. My wife keeps two jugs of it marked as "Kleen Tank Recipe" in huge letters and forbids me to touch it. We believe in it, it's the best process to keep tanks clean (in my opinion).
Happy Camping!

[JKyle]

Originally Posted by WindowMan

Funny...
We use the Kleen Tank recipe as well same as you. My wife keeps two jugs of it marked as "Kleen Tank Recipe" in huge letters and forbids me to touch it. We believe in it, it's the best process to keep tanks clean (in my opinion).
Happy Camping!

The batch I mixed up for this past season I used Lemon Scent PineSol. It smelled really nice! That along with SINGLE PLY Scott Paper and good tank rinsing keeps my sensors working well.