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Open Roads Forum  >  Tech Issues

 > Black Water Tank Missing Capacity

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scoobybri

Virginia

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Posted: 09/09/19 07:24pm Link  |  Quote  |  Print  |  Notify Moderator

Bill.Satellite wrote:

If you shine a light down the toilet, do you see anything that looks like it's not the flat bottom of a tank?


I can see the bottom of the tank, I think. I see black plastic.

scoobybri

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Posted: 09/09/19 07:25pm Link  |  Quote  |  Print  |  Notify Moderator

CapnCampn wrote:

Can you get to the outside of the tank to do some measurements? If so, you can calculate the approx. capacity. If you're getting less than that, it could be "stuff" or an air bubble like was mentioned.

CC


The bottom of the camper is completely insulated so I would need to tear it out to see the tank. I wish it was as easy as measuring the dimensions.

mchero

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Posted: 09/09/19 07:52pm Link  |  Quote  |  Print  |  Notify Moderator

Cut access panels, no need to "rip it out"


Robert McHenry
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Dave H M

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Posted: 09/10/19 06:36am Link  |  Quote  |  Print  |  Notify Moderator

If it ain't broke why mess with it.

As Richard Rawlings says, let her rip tader chip. [emoticon]

RJsfishin

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Posted: 09/10/19 07:10am Link  |  Quote  |  Print  |  Notify Moderator

It is what it is. Capacity calulated from dementions, and usable capacity from real life reality, can be 2 very different capacities. Its always been that way.


Rich

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Bert Ackerman

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Posted: 09/10/19 07:45am Link  |  Quote  |  Print  |  Notify Moderator

Terryallan wrote:

I'm betting it is just a 30 gal tank, and it was mistakenly installed. the brochure claims 38 gal


Bill.Satellite wrote:

A number of people making "assumptions"! Why would a manufacturer lie to its customers?


Mistakenly installed, lies, and assumptions.

Here is an assumption. When the manufacturer is in the middle of a production run of the 275FLSD, and all of a sudden they realize that somebody over in procurement dropped the ball and did not order a sufficient number of 38 gallon tanks, they go a scrambling. They don't stop the line. They find some 30 gallon tanks obtained for the 17LPDC model that will fit, or they'll make them fit, and throw those in. They do the same with anything and everything be it a tank, an appliance, a sofa, anything.

Hence the disclaimer they all have on brochures and websites that state they can change materials and specifications at any time without notice.

If you order an RV at the dealer because it has some features you want, when it arrives you had better go over it with a fine tooth comb before signing on the line, because they very well could have changed one or more of the things you specifically ordered it for.

wildtoad

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Posted: 09/10/19 07:58am Link  |  Quote  |  Print  |  Notify Moderator

I doubt anybody physically checks the actual holding capacity of the tanks when they are doing a PDI. When checking was your unit dead level? If it means that much to you get a flexible camera probe and take a look.


Tom Wilds
Blythewood, SC
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mobeewan

Hampton, Va

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Posted: 09/10/19 08:04pm Link  |  Quote  |  Print  |  Notify Moderator

If the tank vent pipe is installed too deep into the tank, it can stop by the tank from filling completely.

lane hog

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Posted: 09/11/19 05:46am Link  |  Quote  |  Print  |  Notify Moderator

I suspect you didn't get the stock tank. 8 gallons is a lot of space...

So is 30 gallons. The average adult "outputs" about 0.5 gallons per day, so a party of four adults would fill 30 gallons in about 10 to 14 days depending on how long people flush and use the sink.



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Bert Ackerman

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Posted: 09/11/19 06:55am Link  |  Quote  |  Print  |  Notify Moderator

wildtoad wrote:

I doubt anybody physically checks the actual holding capacity of the tanks when they are doing a PDI. When checking was your unit dead level? If it means that much to you get a flexible camera probe and take a look.


I always check the tanks for capacity, we once learned the hard way on a rig we ordered that came with different capacities than listed. All it takes is a garden hose and a $15 flow meter, 20 to 30 minutes. If the dealer wants to B&M about it for the the time it takes or anything else then he can pound salt and I'll purchase elsewhere.

It's not a big deal if you always have hookups. If you go rustic or boondock a few gallons less in capacity can be a big deal. It might be the difference on a given stay between toting Blueboys and/or jugs of water, or not.

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