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Sewer Access in RV Garage-Where to put?

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  • 1 Post By LuvBigBoats

Sewer Access in RV Garage-Where to put?

Old 04-29-2019, 09:59 AM
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Default Sewer Access in RV Garage-Where to put?

Building a house with an RV garage (plan to buy an RV in a year or so). Architect suggested adding a sewer access for pumpout ability when RV is in the garage. Slab foundation that they are digging now.

Was thinking of just having it flush on the floor with a screw cap and creating a threaded line to run from that to the pumpout on the RV.

The RVs I've seen thus far have the holding tank on the driver side. Is that typical? Any other advice?
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Old 04-29-2019, 10:12 AM
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Do you already have a sewer cleanout somewhere in the yard or front of the house? Is it accessible to an RV? Can you get a drain hose to the site? Can you get a garden hose to the plug?
You may already have such a plug in your yard or near that house or driveway.

If not, and you insist on having a dump in the garage put in two sites. One on each side of the garage. The extra cost is minimal. Extra trench and some 4" pvc sewer drain. That way you can either pull in or back in an you will always be ready to dump. Where's the water spigot going to be in the garage? Will is freeze tight in the winter?? Lots to consider.

Personally, I'd put the dump site out next to the slab entering the garage. (Driveway?) That way when you make a mess (and you will) you can hose off the grass rather than the entire garage floor. Then you can garage your RV.

I had a sewer drain cleanout next to my Mailbox in Charleston. Would have been a perfect RV drain.
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Old 04-29-2019, 10:14 AM
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Its a gravity dump and you'd like the tank to be nearer full when you dump it and have plenty of Grey/Fresh in the other tanks to then flush behind it. I think i'd rather have my dump station outside. Perhaps in the driveway near the Garage? So an accident is easier to flush down and clean up. Good idea though.
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Old 04-29-2019, 10:17 AM
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Put the drain hose to hard sewer line connection outside and not inside any building. Keep the stank out as well as any potentially harmful vapors, not to mention roaches. Three inch is adequate.
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Old 04-29-2019, 10:22 AM
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This one was on the passenger's side ....For my TT it is on the driver's side.
I agree with pitting it outside the garage is case there was a "mishap", you can just hose it off into the drain, or on the grass.
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Old 04-29-2019, 11:07 AM
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Thanks guys. Just heard back from the contractor and he too recommends outside the garage, so definitely going that route.

Thanks again!
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Old 04-29-2019, 11:31 AM
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Yes drivers side, yes outside.
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Old 04-29-2019, 11:37 AM
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Just stick a pass through in the wall close to where the outside cleanout will be located. This will give you the option either way.
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Old 04-29-2019, 12:16 PM
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Originally Posted by LuvBigBoats View Post
Thanks guys. Just heard back from the contractor and he too recommends outside the garage, so definitely going that route.

Thanks again!
We have a lot of friends with RV's that visit us in the Hills during the summer. I have two water outlets a 50 and a 30amp outlet.. The dump pipe is like 50' from my garage, I don't think anyone needed to dump until they were leaving, keep in mind, the visitors really only needed (or wanted) the RV's to sleep in...
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Old 04-29-2019, 12:29 PM
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We have one in the shop. We located it 6' behind the sewer connection on the driver's side of the RV and two feet outside the sidewall of the RV when parked. We used the same turn-down end on the sewer hose that you use when you hook up the 4" connection at an RV park, never made a mess in the shop. Worked like a champ, and being inside, nobody ever questioned why we were dumping our RV into the sewer system.
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Old 04-29-2019, 12:55 PM
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When we built our detached garage (with full bathroom) one of the sewer cleanouts was conveniently located right in the middle of the new driveway between the house and the garage. Right where we would keep a class-c RV at some point in the future.
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Old 04-29-2019, 01:04 PM
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Originally Posted by BoatPoor2 View Post
We have one in the shop. We located it 6' behind the sewer connection on the driver's side of the RV and two feet outside the sidewall of the RV when parked. We used the same turn-down end on the sewer hose that you use when you hook up the 4" connection at an RV park, never made a mess in the shop. Worked like a champ, and being inside, nobody ever questioned why we were dumping our RV into the sewer system.
Interesting. Any issues with odors?
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Old 04-29-2019, 01:30 PM
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Make sure the rim of the dump station is elevated an inch or three to keep rain, dirt, leaves and other stuff out.
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