Underslab Plumbing

Looks great Alan. I like the wyes and 1/8th bends...Mad Dog

Very neat, looks great. A toilet connection is an acceptable clean out.

We prefer to " wash " vents to prevent dry horizontal vents below a fixtures flood level.

Dry horizontal vents below a fixtures flood level can become blocked if there's a soilage back - up, with no easy way to clear the vent. Connecting the lavatory drain ( 1.25" ) to the shower vent allows for washing & snaking; not a wet vent, but a combination waste & vent......

Alan,

I've discovered 100's of dry horizontal vents below fixture flood levels in my 50 plus year career; mostly on tub & shower drains. And more than half of those vents were plugged with hair, soap scum, & other organic matter.

In my experience there are way more less than ideal vent connections on tubs & showers; only about 10% are ideal. It's so interesting because there's always a way to be code compliant. I don't asign fault or blame because the installers were probably taught to do it that way......

On High Rise buildings We'll use a Drinking fountain waste stack to "wash" the multi-story vent stack . Mad Dog

@Alan (California Radiant) Forbes

Curious why the toilet has it's own 2" vent when the shower vent is right there?

California is under UPC code no?

What code says that?

international plumbing code

I think a new rule or decorum here should be if you're going to cite code you should post a screenshot of the actual code or copy and paste the text and the location it applies to.

This avoids any confusion and helps others learn.

This is common in electrical groups and honestly I feel it's very beneficial to everyone.

ill try to find it and post it. maybe some one can show me in a code book its legal

its not just for floor drains its any vent.

yes where does it say it can go horizontal before tying in bestto post pictures from a codebook

I like to indivually vent fixtures, but Wet Venting get very creative and fun. When I began in the mid 1980s, I did my apprenticeship in NYC code. "All fixtures shall individually vented within two feet of the trap. It was simple and worked perfectly. After Stony Brook, I worked for R.S. English on Long Island, so then I learned Wet Venting. My Master Plumbers Exam was on NYS Code...tons of Wet venting.

Now, even NYC code allows limited Wet venting. It's all good. Mad Dog

I've found the most roughing mistakes are made by guys that don't understand the principles of venting. Yes, Code with Commentary is an excellent study guide. When I sat for my Master Plumber exam in 1998, I took that thin typing paper you could see through and traced out ALL the venting diagrams: Circuit, Loop, Island, unit, local, backvent, trombone vent, stack vent, wet vent.

That helped me memorize how they were piped. Then I just mimicked them over & over until it was burned in my brain. Mad Dog

I took & passed the unlimited Plumbing license test in 1980; a lot more learning has taken place since then.

what code book does mass use for residental single family homes

@mikedo

Slightly modified IPC.

i live in connecticut and have a p1 and s1 the s1 is for hvac they are both unlimited contractors. the state of connecticut does virtually nothing to enforce the need for a licencse. you cant get a permit without it but that doesnt stop the hundreds of thousands of people working without one. my friend just left californa only the owner needs a licencse so the unions are slow because unskilled people are willing to work for alot less. so not sure it was worth the time and effort to get it.

Just think about this. Go to HD or Lowe's and look around at all the plumbing and electrical material sold in their stores.

How much of that material is installed on jobs that have permits and inspections?

1%, 5%, 10%???????