Sewer line install to basement washroom

[pratihome4]

I recently had a contractor add a new washroom. He extended a sewer line with only a 3.5" rise over a 20ft run and a 0.5 inch drop over the last 2ft (total 22ft).
Also the connection to existing line has a very sharp turn. (See Photos). I would appreciate any professional feedback on this.

Thanks
Mark

 

[arctic bill]

Normally we slope pipes at 1/4 inch per foot, that being said i have had to install pipe with much less that did work with out trouble for many years. Just be gentle on your pipe s, Do not install an ultra low flow toilet for example. I did not like the toilet counter slope. when i had very little slope i would give slope to the beginning of the pipe with the thought that once the waste was up and running in to make it down the pipe,

 

[Twowaxhack]

Based on the numbers given it’ll work fine.

 

[frodo]

piss poor plumbing job. He uses 90 degree bend on a toilet instead of a 45 or 22 degree offset.
plus the line is a full bubble back fall

 

[Twowaxhack]

Yeah, I agree with FRODO based on the pictures.

He did use two 45’s to make the horizontal turn for the toilet. It’s still backpitched.

 

[MicEd69]

I agree with frodo, this is piss poor. It's always hard to meet proper slopes when working away from a sewer under a slab. The slope should be at least 4.8 inches over 20 feet, but you can probably get by with a little less. But the negative slope is unacceptable. Sometimes to make things work you need to elevate the washroom floor. a 4 inch step up into the washroom is a minimal issue if it makes sure the toilet works correctly.

 

[frodo]

22' @ 1/8'' per ft= 2 3/4'' fall minimum

my concern is the pipe is not bedded in sand it is sitting on a rock base

 

[Twowaxhack]

It being back pitched it what bothers me.

 

[frodo]

It being back pitched it what bothers me.

yep, that also

 

[MicEd69]

22' @ 1/8'' per ft= 2 3/4'' fall minimum

my concern is the pipe is not bedded in sand it is sitting on a rock base


View attachment 35802

I was using 2%, but you obviously are correct that 1/8" per foot is good for a 3" line. the negative slope is a real killer though/

 

[Twowaxhack]

We use to follow a slope of 1/8” per ft for 3-4”. Now our code wants .25” per ft.

 

[frodo]

We use to follow a slope of 1/8” per ft for 3-4”. Now our code wants .25” per ft.

what code are you using?

 

[Twowaxhack]

what code are you using?

It depends on where I’m working. Each jurisdiction amends the model codes to what they want it to say. Technically I’d have to buy 12 different business license to work in a 30 miles area. 12 different sets of amendments. They literally make it up as they go.

1/4” for 3” and under and 1/4” for 4” but they’ll give you an exception and accept 1/8” for 4” if that’s all you can get. You must get pre approval for 1/8” fall on 4”.

 

[Twowaxhack]

Also at least 4” pipe is required on sanitary drainage outside the walls of the foundation in my area.

The AHJ required me to run 4” pipe 20’ around a house for a handicap shower addition. They also required at least a 3” vent.

No way I would’ve complied if I was spending my money. It cost a lady who didn’t have money to satisfy their stupid made up BS.

Sorry to be off topic, I thought I was on a different thread. I apologize.

 

[MicEd69]

International Plumbing Code

 

[Twowaxhack]

Read 708.1 of the UPC.

This guys in Ontario Canada if anyone knows what the Canadian code says

 

[frodo]

canadian national plumbing code is 1 in 50 weird math which is a 2% slope in a real math

 

[MicEd69]

canadian national plumbing code is 1 in 50 weird math which is a 2% slope in a real math

2% is what I initially replied to, but IPC, as noted above, allows 1/8"/ft as you indicated. So pratihome4 does have a code issue living in Canada.

Damn the luck!

 

[CT18]

Did you pull a permit

 

[frodo]

Did you pull a permit

i doubt it, job look like ****