Gravity fed slip tank

[Matty898]

So I have a 2015 3500 ram and I just got a slip tank for it. 185L. I haven't the slightest idea on how to plumb it in. I've watched a few videos and read a few things but it seems like there are 100 ways to plumb it in. What is the easiest way to do this? And .can I leave the val be open all the time or should I keep it closed?

 

[AH64ID]

I would put a small pump on it so you can push thru a filter.

Filters can work under gravity, but a pump is better.

 

[JR]

I used a tee like this on my 98

https://www.fillernecksupply.com/1-...ler-neck-adapter-tee-kit-see-details-dz97962/

The description states there is a check valve but I would verify it is in the main run of the tee. The tee I used did not have a check valve so I had to source one independently. Depending on the size of the aux tank and amount of head pressure the fuel flaps on the gen 4 may be sealed enough to stop the flow of fuel from the aux but I would not rely on it.

 

[Wiredawg]

On my 2017 Ram 5500, I don't filter the fuel from my aux tank and I upgraded the fuel and fittings to 1/2" with a ball valve to transfer fuel. Works great.

I had a pump and filter on my previous 09 4500, but while transferring fuel once, got busy driving and forgot to shut off. It built enough pressure in the OEM 52 gal tank and blew it out the anti flow valve and dumped about 10 gallons of diesel. I needed some type of pressure shutoff switch.

I don't have any problems transferring fuel manually and without a filter. I always keep both 60 gal aux and 52 gal full and haven't had any problems with almost 20K miles on the clock.

Hope this helps, Ron

 

[AH64ID]

My biggest concern with an in/on bed tank is the potential for a greater temp swing in sunlight and the moisture associated with it. If you park indoors or burn it quickly it won’t be an issue.

If you add a filter I’d use a water absorbing one like a Zinga.

 

[Wiredawg]

My biggest concern with an in/on bed tank is the potential for a greater temp swing in sunlight and the moisture associated with it. If you park indoors or burn it quickly it won’t be an issue.

If you add a filter I’d use a water absorbing one like a Zinga.

I agree with you and you need to proactively manage how you use an aux tank. Although my 17 5500 and 09 4500 were stored indoors, my 02 3500 never was. I kept them both topped, and when not traveling, I used fuel in primary, filled it from aux tank, and filled only the aux tank with fresh diesel.

We have lots of heat here in SW TX, so when fueling locally, I fill both tanks with spicket all the way in until first click and never any problem with fuel leakage. As an honest broker, last trip out both tanks full, was only about 150 miles. Campsite nice and level. Snowbird next to us wanted to clean and treat there roof, so I offered to move my clean truck to their 2nd site to not get it sprayed on. So I parked at an angle with low side on the driver's side and a couple gallons seeped out the turnover safety valve and the attached breather hose. Outside temps were around 60°F. Anyhoo, in hindsight and for future benefit, I need to transfer some fuel if I this situation again.

So, using inbed aux tanks can be managed. I've been happy with the ones I've had for almost 20 years.

Finally, just for grins, I checked online 2020 Ram 3500 CC 4x4 dually equipped with optional 50 gal tank for just $295. That's probably the best deal anywhere.

Cheers, Ron

 

[HarryOlson]

I have a 2019 3500 with an auxiliary 90 gallon tank. It is gravity fed and is always on. I’ve had similar on my prior three trucks and believe you’re better off without a pump. If needed, I’ll be happy to take a couple of pictures of the installation for you.

 

[HarryOlson]

I have a 2019 3500 Ram with a 90 gallon auxiliary fuel tank. It is gravity fed and is always on. I had a similar setup on my past three trucks without any serious issues. I believe you’re better off without an extra pump. If it helps, I’ll be happy to take pictures of my installation.