QOD for 6/1/06 Plumbing

[gbeaumont]

Hi to all

here's todays question

Regards

Gerry

[Blaine Wiley]

I wish my kitchen was on a nice tropical island....

[dgagne1]

In my state ....yes

[gbeaumont]

Hi to all,

Dan, in most areas the answer would be no

and yes the answer is code based IRC 3112.1 and UPC 909.0

The issue being one of venting

Regards

Gerry

[rlind]

Yay - I'm one of only 5 people that knew the correct answer! And I knew the reason was insufficient venting...

[rarmstrong1]

P3112.1. Kitchen sinks with a dishwasher waste connection, a food waste grinder, or both, in combination with the kitchen sink waste, shall be permitted to be vented in accordance with this section (Island Fixture Venting).
Wouldn't that mean "yes".

[Brian E. Kelly]

[gbeaumont]

Hi to all,

I will do some further research on this issue as the IRC full text appears to contradict itself on this issue.

ISLAND FIXTURE VENTING

P3112.1 Limitation.
Island fixture venting shall not be permitted for fixtures other than sinks and lavatories. Kitchen sinks with a dishwasher waste connection, a food waste grinder, or both, in combination with the kitchen sink waste, shall be permitted to be vented in accordance with this section.

P3112.2 Vent connection.
The island fixture vent shall connect to the fixture drain as required for an individual or common vent. The vent shall rise vertically to above the drainage outlet of the fixture being vented before offsetting horizontally or vertically downward. The vent or branch vent for multiple island fixture vents shall extend to a minimum of 6 inches (152 mm) above the highest island fixture being vented before connecting to the outside vent terminal.
P3112.3 Vent installation below the fixture flood level rim.

The vent located below the flood level rim of the fixture being vented shall be installed as required for drainage piping in accordance with Chapter 30, except for sizing. The vent shall be sized in accordance with Section P3113.1. The lowest point of the island fixture vent shall connect full size to the drainage system. The connection shall be to a vertical drainpipe or to the top half of a horizontal drain pipe. Cleanouts shall be provided in the island fixture vent to permit rodding of all vent piping located below the flood level rim of the fixtures. Rodding in both directions shall be permitted through a cleanout.

I'll get back to you.

Regards

Gerry

[Brian E. Kelly]

It is permitted, just like is says in 3112.1.

[away]

I was going to post and ask Gerry to clarify this one but after looking at the code section and reading the question it would seem that if a DW is in an island then there had better be a sink as well. The question only asks if a DW is allowed so I thought he was being tricky and not to assume a sink was present. So in that case DW's are not allowed as noted in the first sentence of 3112.1.

As I read the second half of 3112.1, it seems to be addressing kitchen sink island venting only. Take out everything after "kitchen sinks" and up to the comma after "waste" and you end up with "Kitchen sinks shall be permitted to be vented in accordance with this section." I think all the other gobbledy gook is just to be sure that the island sink is the true kitchen sink and not one used simply for food prep.

So all in all I think a DW by itself would not be "up to code" but one with a kitchen sink would be just fine since the venting would be there.

[Jae Williams]

So everyone is correct...or incorrect...or not...

[gbeaumont]

Well kinda yes and No

It was a bad question with an incomplete answer

Regards

Gerry

[Paul W. Abernathy]

lol....Gotta Love Those....

[gbeaumont]

Originally Posted by pabernathy

lol....Gotta Love Those....

Thanks Paul, I write around 800 questions per year one way and another I hope I'm allowed to get it wrong now and again.

Regards

gerry

[Brian E. Kelly]

Originally Posted by gbeaumont

Well kinda yes and No

It was a bad question with an incomplete answer

Regards

Gerry

The question was fine and the answer is yes.

Now perhaps your next more carefully worded question will have a different answer.

Ta

Gerry