Is this a correct install? Pic of Shower and Toilet Drain installed by local plumber.

[brianslink]

I hired a local plumber to install the drain and waste vent for my new construction home. This is a picture of a drain area I am concerned with. The shower drain (double shower) on the left starts the run and it continues to a toilet drain on the right which continues on to the main line. No vent. I am afraid when the toilet is flushed it will suck air from the shower trap and gurgle. Am I wrong?

[Terry]

Yes. You are right. The shower is not vented. Have the hacks come back out and install a vent on the shower trap arm before it enters the 3" fitting.

Is there a plumbing permit for this? And if so, does the inspector look in the crawlspace?

Here is a nice link to Bert Polk's plumbing tips

[brianslink]

Thanks for your reply. Yes, I purchased a building permit through my city which includes elect, plumbing, hvac, etc. I do not think the inspector goes in the crawl space though. Here are a couple of pics of another bath at the other end of the house. The crawl space pic is actually two pictures joined together. I also included a photo of the same area topside.

The drain run starts at the tub/shower and continues to the toilet and then continues to a double vanity. The only vent I see is at the double vanity. Will this work?

[Terry]

No. That will not work.

No vent on the shower.
The vent for the tub/shower needs to come off at the same height as the trap arm. If it's below the trap arm, or after it has turned down towards the ground, it is no longer vented.
Have them cut in a 2" x 1.5" combo between the p-trap and the 45 and extend the vent up into the wall above.

Seriously, you've got to be kidding me!

Here is a nice link to Bert Polk's plumbing tips

[Tom Sawyer]

Does the "local plumber" have a license? I'm betting NOT

[boardable]

Ok someone correct me if I am wrong. No line can be any more than 5 feet from a vent. AKA if you want to use a single vent stack the rest of the lines can not be more than 5 feet away. You can share one toilet, two sinks, and two bath's or showers on one two inch vent. This is max. The vent in the wall can not be at any more than a 45 degree angle. In your photo it is at a 90 degree angle. Once again I was taught this is a no no. You have no access issues by looking at your crawl space so there is no reason not to do this correctly. Tell them to get back down there and do it right.