[lsblpn]

Is it a bad idea to place a toilet at end of the main drainage Line. Planned on the vent stack being in the corner of the building followed by the toilet, shower, bath sink, washer, ending with the kitchen sink. These will all be on one wall making the main drainage line one strait pipe, but didn't know if a toilet at the end of the line was mechanically a bad idea.

[massplumber2008]

Hi Isblpn

I see no issue with putting a toilet anywhere in relation to the drain system... ;)

I do, however, see an issue with what you present as your VENT system.

Here, for example, in some states you need to individually vent each plumbing fixture (each fixture gets its own vent and then all vents connect together into the vent stack at the appropriate height off the floor), or as in some states you can WET VENT your bathroom (means the toilet, sink and tub/shower can share the same vent), but the washer drain and kitchen sink MUST have their own vents, etc...

Let me know what state you are from and let me know more on how you plan to vent everything, OK?

Mark

[lsblpn]

Mark,
Thanks for your reply. I live in NC. If you tie into the main vent stack after each fixture for venting, can you explain how this done.

Hi Isblpn

I see no issue with putting a toilet anywhere in relation to the drain system...;)

I do, however, see an issue with what you present as your VENT system.

Here, for example, in some states you need to individually vent each plumbing fixture (each fixture gets its own vent and then all vents connect together into the vent stack at the appropriate height off the floor), or as in some states you can WET VENT your bathroom (means the toilet, sink and tub/shower can share the same vent), but the washer drain and kitchen sink MUST have their own vents, etc....

Let me know what state you are from and let me know more on how you plan to vent everything, OK?

Mark

[speedball1]

Here's what NC code says.

912.2.1 A combination waste and vent system,(wet vent) is limited to sinks, dishwashers, floor sinks, indirect waste receptors, floor drains or similar applications where the fixtures are not adjacent to walls or partitions. It consists of the installation of waste piping in which the trap of the fixture is not individually vented.

[massplumber2008]

Since wet venting is allowed in your area it is exactly as I presented in my first post on wet venting. Here, "your bathroom (means the toilet, sink and tub/shower can share the same 2" vent), but the washer drain and kitchen sink MUST have their own vents, etc."

This means that the toilet and shower/tub use the sink drain and vent to "wet vent" the bathroom group. As noted, the washer and kitchen sink get their own vents and these vents connect together and connect into the vent stack.

Vents must pitch from the stack toward the drains they vent so any rain water or condensation build up can fall down the drain via gravity.

You can google "basic venting plumbing" to learn more on how to pipe a vent system. Google "wet venting" a bathroom group under google images to see how that works, too!

Mark

[speedball1]

Here's a typical bathroom wet vent installation in my area, good luck, Tom

[lsblpn]

I appreciate all the input guy's. I have read up on what you all have recommended. Wanted you guys to look over my proposed layout. Try to attach it here.

Try this, easier to read.

[massplumber2008]

See my picture below... should get you started in the right direction. Questions? Let me know, OK?

Mark

[speedball1]

Follow Marks advice, "S" traps are a plumbing No-No. Here are some more outlawed traps. Good luck, Tom

[hkstroud]

Why you going through the exterior wall and then through the roof? Plays hell with siding, soffits and gutters. Why not go straight up through roof?

[massplumber2008]

Answer Harold's question and then please note that in my drawing I have shown the PTRAP going to the washer as being below the floor. It is only drawn below the floor... should be instalkled above the floor is all, OK?

Mark

[lsblpn]

Mark,
Thank you so much for the design advice. Will do it your way.

1. Are the PTraps bought as separate units with cleanouts?
2. No problem putting the ptrap above the floor on Washer.

Tom,
Thanks for the input on the traps.

Harold,
The reason for the stack there is it's a metal roof and exiting through the endwall and going through the roof there will minimize the chance for leakage inside the house.
1. Is it OK to run the stack like that? Will that have any affect on proper venting?

[massplumber2008]

Yes, PTRAPS are purchased as separate units with cleanouts.

It is OK to run the stack as you presented... ;)

Mark

[speedball1]

Harold asks,

Why not go straight up through roof?

Or you could simply run to the attic and revent back into a existing roof vent using a inverted sanitary tee. Good luck, Tom

[massplumber2008]

And in post #12 Isblpn answered, "Harold,
The reason for the stack there is it's a metal roof and exiting through the endwall and going through the roof there will minimize the chance for leakage inside the house."... ;)

[speedball1]

That's the reason I gave for reventing back in the attic, Regards, Tom

[lsblpn]

Guy's
Thank you so much for the input!! You guy's are the best. I really appreciate it!
Larry

[speedball1]

Please let us know what you decide and how you made out. Good luck, Tom

[lsblpn]

Will do Tom. Try to take some pics as I go. Thanks again!
Larry

Did have one other question guy's. Should the toilet drain into a wye at the beginning of the main line or strait it?

[massplumber2008]

As shown in my drawing... can only use WYE fittings on the horizontal drains.

Sanitary tees can be used on the vertical for drains and on the horizontal for VENTS ONLY... ;)

Mark