Add RV dump to septic tank


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Old 10-12-22, 08:40 AM
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Add RV dump to septic tank

Hello,
I am wanting to add an RV Dump Station fitting to my Septic tank so i can dump my RV when i get back from camping. Should the pipe go down below the water level into the effluent water table portion of the septic tank or can it just dump out on top of it?

skeeter
 
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Old 10-12-22, 07:41 PM
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I wouldn't think it's necessary to discharge below the liquid level.
I've seen many people just tap directly into their sewer line.
How do you plan to attach it to your septic system ?

Not quite sure how sewer gases are handled with no trap.
I don't believe there is a trap under the RV.
 
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Old 10-13-22, 12:00 PM
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Would it be possible to put together something that would fit into the cleanout of the sewer line from the house? Say maybe a 90 that sits inside the cleanout pipe and the other end attaches to the RV? Would not a 3 inch diameter 90 work? Then there is no digging or pipe installation required. Just screw off the cleanout cap and attach 90, dump tank, remove 90, screw cap back on and job is done.
 
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Old 10-14-22, 08:08 AM
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Clean out access is in the back yard and not accessible. My septic tank is in the front yard. I was planning on just going straight down through my septic clean out lid with a 3" adapter on top to connect my RV sewer hose when needing to dump. So, it would go straight into the top of my septic tank. On a septic tank, normally the inlet on the septic goes in below the water level so the solids(poop) fall to the bottom and any floating matter forms at the top and the liquids flow through to the leach field. If the floating matter builds up enough before i get it pumped it could cause the solids to build up above the floating matter. Ewww.....and that might cause problems. Usually, i dump about 40 gals out of my RV. That could be a lot of solids to be laying on top.

Well, i guess i answered my own question. The proper way is going to be adding a pipe going down into the effluent water.

Anybody have anything to add that might help?

skeeter
 
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Old 10-14-22, 08:22 AM
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I see your point. There's nothing worse than floating poop.
 
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Old 10-14-22, 11:09 AM
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You are correct. You should NOT pipe directly into the top of the tank. You don't want your dumps to disturb or break up the crust layer in the top of the tank. That agitation can allow solids to get past the baffle and into the second chamber of the tank where they should not be. It is much better to dig dow to the pipe leading to the tank and intall a clean out/dump location. That way the effluent will enter the tank in the proper manner.
 
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