Is flexible drain kit appropriate for my kitchen sink?

[Nikita]

Hello,

I am replacing my 2-bowl kitchen sink with a new model whose left bowl (connected to disposal) will be ~ 3.5" deeper. Looking to replace plumbing as well (see current setup) and, concerned about space, came across a flexible drain kit. Looks convenient. Any reason not to use one and go with a more conventional, rigid pipe? Is a certain pipe material more preferable?

Also this kit is 1.5" inches whereas the waste drain and current p-trap are 2" and current. Any issue with using a 2" -> 1.5" reducer to connect this kit to the waste drain?
http://snappytrap.com/

Details

• live in San Jose, CA
• see photos here (also see captions)
• waste drain and p-trap are 2" in diameter
• disposal elbow and secondary sink's current tail piece are 1.5"
• new sink diagram (left bowl ~ 3.5" deeper than current)

thanks!

-nikita

 

[Gary Swart]

These a never acceptable anywhere. They are sold to unsuspecting DIY because they look like a quick, easy, simple way around a problem. There is a way to do it right.

 

[Sponsor]

 

[Nikita]

Thanks for you reply, Gary. Could you please elaborate on why, though?
Also are flexible extensions like this one also not appropriate? thanks.

 

[Asktom]

I'm with Gary. The corregations accumulate slime and become a bacteria farm. Also, not close to legal.

 

[hj]

Your existing system is 1 1/2" sch. 40 pipe, not 2", and most plumbers do not use it preferring 1 1/2" tubular drainage.

 

[FullySprinklered]

The really great thing about doing the drains on a kitchen sink is that is stays accessible. As a homeowner you can goober it up as much as you want and fix it later if it doesn't work.

 

[Gary Swart]

The really great thing about doing the drains on a kitchen sink is that is stays accessible. As a homeowner you can goober it up as much as you want and fix it later if it doesn't work.

This may be acceptable in Georgia, but in the civilized world, codes prevail. Too many DIY think if their cobbled up job works, it's OK, so never mind the codes because codes are just there to make money for the government.
the Redneck Teaparty wants to down size government by eliminating all regulations like this.

 

[Nikita]

Your existing system is 1 1/2" sch. 40 pipe, not 2", and most plumbers do not use it preferring 1 1/2" tubular drainage.

Hi, HJ:

Perhaps I am measuring the wrong thing, but I measured the circumference of both the p-trap and the waste drain (sticking out of the back wall). Both were 6", yielding a diameter of ~ 1.9". Why do you say it's 1.5"? Or are you not referring to either of these?

FWIW the tail piece coming out of the non-disposal sink and the elbow coming out of the disposal are indeed 1.5".

Thanks,
-nikita

 

[Asktom]

There are two sizes of 1 1/2". 1 1/2" pipe has an outside dimension of 1 7/8" (about 1 1/2" inside). 1 1/2" tubular size is 1 1/2" OD.

 

[Nikita]

@asktom - Thanks, makes sense

 

[FullySprinklered]

This may be acceptable in Georgia, but in the civilized world, codes prevail. Too many DIY think if their cobbled up job works, it's OK, so never mind the codes because codes are just there to make money for the government.
the Redneck Teaparty wants to down size government by eliminating all regulations like this.

Not a good venue for political concerns.

 

[Terry]

I think the simple answer is:

Home centers sell all kinds of stuff that the plumbers can't legally use.
I don't lose sleep over it though. When I'm working on a job, and I see that kind of stuff, it gets tossed, and I use the correct fitting from the truck.
Can you use the fitting and have it work? Yes.
Do the plumbers use them? No.

Now lets not start discussing the music we listen to. That could really get out of hand.

 

[FullySprinklered]

I think the simple answer is:

Home centers sell all kinds of stuff that the plumbers can't legally use.
I don't lose sleep over it though. When I'm working on a job, and I see that kind of stuff, it gets tossed, and I use the correct fitting from the truck.
Can use use the fitting and have it work? Yes.
Do the plumbers use them? No.

Now lets not start discussing the music we listen to. That could really get out of hand.

Thanks, Terry. May reason prevail.