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Old 07-18-2018, 12:38 PM   #21
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Originally Posted by Dskyward View Post
Sorry for being slightly off topic, while my unit does not have an outdoor sink, I thought Iíd throw this in this footnote to the alleged 50 gal shower grey capacity of my NP 377RLBH...with app 1.5 gallons standing water in the shower basin, an experiment using four 5 gal buckets, I collected 3 rounds (all an inch from the top) plus app three gal bucket for 63 gallons! Iíve yet to try the same with the 35 gal galley grey.

Iím a fan for knowledge of the exact capacities of all my tanks. Hope you find the true cause of your backup with the kitchen grey. Has anyone asked about where the vent to it is located? What is itís condition?

Thanks for sharing. You're method is the best way to figure out exactly how much the tanks will hold.

Glad you posted your results.

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Old 07-18-2018, 01:00 PM   #22
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Your quite welcome. Iím a fan of all these RV and diesel forums. I read whenever I get the chance. What can I say, Iím a knowledge junkie and love to share.
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Old 07-20-2018, 08:58 AM   #23
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I had the same problem took it to dealer thjey added another vent and it works great now
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Old 07-23-2018, 02:09 PM   #24
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Had not thought of that. Did they forget to install a vent to the system? Maybe that mechanical trap is closed by pressure in the grey tank, causing the sink to back up?

I'll have to remember that one.
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