gravity draining tank

[Gregory]

I have a small, outdoor wedding venue for weekend summer events. I got a PJN3 for guys and a Comfort XL for gals, handicaps and wheelchairs. They are situated at the top of a small slope with a road at the bottom. I would like to gravity-drain the tanks into the portable tanks in the back of a pickup that I would take to the RV dump. Are there valves that can be put on the bottom of the portajohn tanks that would connect to a drain hose that RVs use?

[Alex]

Im also interested in the topic. I’d like to buy some portable restroom, but want to do maintenance by myself.
Is any model with gravity drain valve? I already sent the question by email, still waiting for answer…
Please reply anybody

[potty animal]

I am pretty sure that it is illegal to haul liquid waste without a proper license. I know that we have to have one in order to run our business. Not sure if there are regulations on limits for people without a license or not. But I do know that PolyJohn has has an RV type valve that can go on the bottom of a waste tank. I would call into one of their reps and ask them about it.

[Autor]

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