I am building a guest house behind my home. The kitchen sink will be about 16 feet from the vertical down drain. It is impractical to vent this directly above the sink due to a window. I can vent it aproximatly 5 feet down line from the window. My question is will this work? Also can I use a 'flapper' vent in addition or in lue of the vertical vent? - One more question, would one vent through the roof be OK if I tie all the vertical vents together in the attic?
Oh, one more thing, Is there anyplace that can give me some general plumbing dememsions -- Drain height out of wall, pitch of drains, distance from vertical vents, heights of supply valves out of wall,- etc etc. Seems all I can find is general info. For example, I know that a toilet flange has to be 12" OC from the wall.

I am building a guest house behind my home. The kitchen sink will be about 16 feet from the vertical down drain. It is impractical to vent this directly above the sink due to a window. I can vent it aproximatly 5 feet down line from the window. My question is will this work? Also can I use a 'flapper' vent in addition or in lue of the vertical vent? - One more question, would one vent through the roof be OK if I tie all the vertical vents together in the attic?


"]I am building a guest house behind my home. The kitchen sink will be about 16 feet from the vertical down drain. It is impractical to vent this directly above the sink due to a window. I can vent it aproximatly 5 feet down line from the window. My question is will this work?"

Yes it will indeed work. Most of our kitchen sinks are roughed in under a window. On a 2" drain line you are allowed, by code, to run 5' from trap to vent. If local code allows, you may use a spring loaded mechanical vent instead of going through the roof or reventing.

"One more question, would one vent through the roof be OK if I tie all the vertical vents together in the attic?"

Yes, this is called reventing and we do it all the time. After the vents are tied together increase the pipe size that's going through the roof to at least 3". Hope this helped and thank you for rating my reply. Tom

Thanks Tom - But no one seemed to see my second paragraph - Does any one know the standard demensions for pluming drain layouts?

Thanks Tom - But no one seemed to see my second paragraph - Does any one know the standard demensions for pluming drain layouts?


Youe question was answered in my last post (On a 2" drain line you are allowed, by code, to run 5' from trap to vent. If local code allows, you may use a spring loaded mechanical vent instead of going through the roof or reventing.)

The complete list follows.
From trap to vent.
1 1/2" drain pipe (not recommended) 3 1/2'
2" " " (recommended) 5'
3" (recommended) 5'
3" " 6'
4" " " 10'
Regards, Tom

Yes I got the info the first time but I guess you don't understand my last question. I would like to find out if there is a listing of various demensions for plumming -
Height of the stops out of the wall below sinks
Height of the stops out of the wall below toilet
Height of the valves in showers
Drain height out of the wall under sinks - kitchen and bathroom
Also Drain height under deep sinks
Toilet flange distance from wall ( I know this is 12")
Height of stops for outside faucets
ETC ETC

Thanks - Hal

Yes I got the info the first time but I guess you don't understand my last question. I would like to find out if there is a listing of various demensions for plumming -
Height of the stops out of the wall below sinks
Height of the stops out of the wall below toilet
height of the valves in showers
Drain height out of the wall under sinks - kitchen and bathroom
also Drain height under deep sinks
Toilet flange distance from wall ( I know this is 12")
Height of stops for outside faucets
ETC ETC

Thanks - Hal

Height of the stops out of the wall below sinks = 18"
Height of the stops out of the wall below toilet = 6" off the floor and 6" off center
height of the valves in showers = 48"** shower head 72"
Drain height out of the wall under sinks - kitchen and bathroom= 18"
also Drain height under deep sinks =12 to 14"
Toilet flange distance from wall ( I know this is 12") to center
Height of stops for outside faucets = 36" average

Thanks a lot!

SpeedBall1,

I will be installing a toilet where directly below is a garage, so the soil stack is 24 feet away across the ceiling of the garage.

Just to verify, are you saying it is OK to be up to 6 feet away from the closet bend on a toilet before wet venting vertically if the toilet drain line is 3" ?

Is that still OK if the vent is not going straight thru the roof but runs horizontally through attic space for 10 feet before being tied to another vent for shower and sink ?

And can that vent pipe be 2" or does it need to be 3" ?

I'm in California if it makes a difference.

PS. My alternative to venting this would be straight up the wall behind the toilet, but that would put the vent upstream from the closet flange rather than downstream. Would upstream venting be better ? Would I use a closet bend with a rear 2" vent horizontally and then up the rear wall ?

Thanks,
Kirk

SpeedBall1,

I will be installing a toilet where directly below is a garage, so the soil stack is 24 feet away across the ceiling of the garage.

Just to verify, are you saying it is OK to be up to 6 feet away from the closet bend on a toilet before wet venting vertically if the toilet drain line is 3" ?

Is that still OK if the vent is not going straight thru the roof but runs horizontally through attic space for 10 feet before being tied to another vent for shower and sink ?

And can that vent pipe be 2" or does it need to be 3" ?

I'm in California if it makes a difference.

PS. My alternative to venting this would be straight up the wall behind the toilet, but that would put the vent upstream from the closet flange rather than downstream. Would upstream venting be better ? Would I use a closet bend with a rear 2" vent horizontally and then up the rear wall ?

Thanks,
Kirk


Hi Kirk,

" are you saying it is OK to be up to 6 feet away from the closet bend on a toilet before venting vertically if the toilet drain line is 3" ? "

Yes, up to 5' from trap to vent.

"Is that still OK if the vent is not going straight through the roof but runs horizontally through attic space for 10 feet before being tied to another vent for shower and sink ?"

Yes again! It's still a vent no matter if it's vertical or horzontal.

"And can that vent pipe be 2" or does it need to be 3" "

You can use 2" for the vent.

"I'm in California if it makes a difference."

If you don't run afoul of any local codes your good to go by my code book.

"PS. My alternative to venting this would be straight up the wall behind the toilet, but that would put the vent upstream from the closet flange rather than downstream. Would upstream venting be better ? Would I use a closet bend with a rear 2" vent horizontally and then up the rear wall ?"

Code dictates that you may use a side or heel inlet closet bend as a vent ONLY if it's washed by another fixture such as a lavatory. Since I don't see you tieing a fixture into that vent I'm going to hafta go with door #1.
Good luck. Tom

Thanks !

I'm actually surprised. As I was writing the PS, I was convincing myself that was going to be the preferred method. Hadn't thought about waste backing up and sitting in the heel without another upstream fixture washing it.