Another garage urinal thread

[reklund5]

So I just bought a house recently, and I finally have my dream shop- at least in terms of square footage. It's a 40x50 or so building with 3 bays. There's an office in the back of one bay, plenty of room for a lift and storage in the others. The guy who originally built the place used it to store his RV primarily, and as such there's not an abundance of electrical capacity (only 30 amps) but it does have fresh water hookups and sewer dumps for the RV. The water is supplied by a hydrant sunk into the slab, and the sewer is your standard 4" pvc pipe with a cap on it.

The long term plan is to add a room on the back with a full bathroom but for now I need a place to recycle the beer.

I bought this cheap plastic urinal from Amazon, which has a 3/4" OD slip fitting on the bottom, to slide a hose onto. I'm wondering if I just get a new 4" PVC cap for the sewer dump if I can drain the urinal into the sewer without any adverse effects. I'm thinking maybe a molded rubber hose p-trap but I'm not sure it'll drain without a vent. I can also use the fresh water with a garden sprinkler nozzle to "flush" periodically to keep the smell down.

I know garage urinals have been hashed out a time or two from the searching I've done but I've not encountered a thread where it drains into the RV dump style setup I've got.

Any thoughts are welcome and appreciated.

 

[dagofast]

I'm not a plumber, but I think all you'll need is a P trap between the urinal and the RV dump to block the fumes from coming up the 4" line.

 

[nadogail]

I'm not a plumber, but I think all you'll need is a P trap between the urinal and the RV dump to block the fumes from coming up the 4" line.

I absolutely agree

 

[Nicks garage]

Have you considered a waterless trap like this https://www.ebay.co.uk/itm/303554163578

 

[sberry]

It wouldn't need a vent.

 

[sweetk30]

dirt cheep used what i had and doing great for a few years now .

recycled yellow funnel ( not picked for color )
length of plastic hose and used 1/2" copper pipe elbow combo for pee trap
55 gal blue barrel plastic 40-50 holes drilled in bottom and up sides a little bit
dig hole and burrie it in gravel for drainage and hook hose up
1 huge 1qrt water bottle hole in cap for rinse after pee

no problems even in cold winter . no smell . no vent hose . and she just works .