Hello,I just bought an RDS tank. It is gravity filled. It will go in a 2022 Ram 3500. Apparently,RAM decided not to put a gas cap on these trucks so you have to manually fill the tank (open valve) and close it when gauge is full. It sounds like a pain in the neck. I was told a motorized ball valve could be installed to control the filling of the tank from inside so I don't have to manually and physically pull over to start and stop.Can you share how you solved this problem?Thank youMC

MC,I had such a device on my class c diesel. It would stick. Leaving me stranded--with LOTS of fuel.I don't recommend it.

All you need is the tee for the fuel filler hose with a check valve in it. They’re sold by the fuel tank mfgs as “kits.” Gravity feed, 100% hands off and super simple.

I was told that because the 2022 Ram 3500 doesn't have a fuel cap, fuel spills out even with the check valve in place. I don't see how but apparently it does. It sounds like the mechanized ball valve may be an overkill. Perhaps a simpler solenoid would work better. It will be nice to leave the manual shutoff valve open, use the solenoid to control the aux tank remotely and let the check valve keep main tank from overflowing. I am just a little confused with the no gas cap situation and what it means. MCGrit dog wrote:All you need is the tee for the fuel filler hose with a check valve in it. They’re sold by the fuel tank mfgs as “kits.” Gravity feed, 100% hands off and super simple.

Couldn’t you just use the manual shut off and leave it closed until you need it? That’s to say when your fuel gauge shows something below 1/2 you open it when you stop for another reason?If you open it with half of the oem tank remaining, you could almost certainly drive the rest of the day and with the rate of fill vs the rate of burn it would take at least a couple hours to get the oem tank back to full.

You can purchase a kit with a ball valve in it that stops the fuel when tank is full. I have one on my 2019 Ram and it works great, no problems so far. Also have a manual valve at the tank should there be a problem.linkyMod Edit: Created clickable link. When posting a link please click on the and paste the link there, add any text you wish. Long URLs cause the forum to skew wide off the screen. Thanks.

Help with fuel transfer valve | Good Sam Community

Bionic_Man
Explorer
Mar 23, 2022
Couldn’t you just use the manual shut off and leave it closed until you need it? That’s to say when your fuel gauge shows something below 1/2 you open it when you stop for another reason?

If you open it with half of the oem tank remaining, you could almost certainly drive the rest of the day and with the rate of fill vs the rate of burn it would take at least a couple hours to get the oem tank back to full.
speediq99
Explorer II
Mar 23, 2022
I was told that because the 2022 Ram 3500 doesn't have a fuel cap, fuel spills out even with the check valve in place. I don't see how but apparently it does.

It sounds like the mechanized ball valve may be an overkill. Perhaps a simpler solenoid would work better. It will be nice to leave the manual shutoff valve open, use the solenoid to control the aux tank remotely and let the check valve keep main tank from overflowing. I am just a little confused with the no gas cap situation and what it means.

MC

Grit dog wrote:
All you need is the tee for the fuel filler hose with a check valve in it. They’re sold by the fuel tank mfgs as “kits.” Gravity feed, 100% hands off and super simple.
Grit_dog
Navigator
Mar 23, 2022
All you need is the tee for the fuel filler hose with a check valve in it. They’re sold by the fuel tank mfgs as “kits.” Gravity feed, 100% hands off and super simple.
pianotuna
Nomad III
Mar 22, 2022
MC,

I had such a device on my class c diesel. It would stick. Leaving me stranded--with LOTS of fuel.

I don't recommend it.

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