Yet another single to double vanity question

[Jadnashua]

Some of this depends on your vanity...they come in heights from around 29" to 33" or even higher, so a fixed position doesn't really exist except in that 'ideal' situation. The wall opening needs to be where you have adequate room for the bottom of the sink, the trap and to maintain the proper fall to the wall and the vertical there.

 

[BAPlumber]

Is this the scheme Terry wanted? Should I still have a vertical pipe after Lav2 connecting to the revent?

I had to dig around to learn some terms. Also, what I now have labeled as a santee in the stack I had drawn as what I thought was a wye. Does this need to be a wye or is a santee correct?

This is crazy!

terry has it right. that diagram is the way to do it except the upper "tee" should be an upside down santee. I don't understand all the talk of wet venting. I don't see a wet vent in any of the pictures posted, none of the vents were also carrying waste.

 

[Sponsor]

 

[BAPlumber]

If you have the pedestals on hand you can always set them up with the pop up, hook up a p-trap and measure. and as far as pipe size, use 1.5".

If you start your first santee a couple of inches above the floor you should be able to get you trap arms as low as 16", maybe lower.

 

[lojoma]

Thanks for the advice. Why an upside down santee on the top?

Unfortunately, don't have pedestals on hand...trying to budget this a bit at a time. Maybe I can find one in a store all set up. I do have pretty detailed drawings from Kohler with the dimensions, though. I am using the same faucet as in a different bathroom, so I should be able to measure and see how long the pipes are. Yeah, we might be able to make this work.

Also, due to some obstructions, I can't get that bottom santee as low as you describe...so 21 to 21 1/2 may just have to work.

 

[lojoma]

Speaking of pipe size, the floor drain is 2" so was going to use 2" santees for the bottom two with 1 1/2" arms coming off for the horizontals. The existing vent pipe coming down from the ceiling is 1 1/2", so my thought was to put a reducer between the middle santee and the top one and use a 1 1/2" santee for the top one, so it can tie in with the existing. Or, I could use 2" on all the santees and reduce above it. Is either better?

 

[BAPlumber]

The existing vent pipe coming down from the ceiling is 1 1/2", so my thought was to put a reducer between the middle santee and the top one and use a 1 1/2" santee for the top one, so it can tie in with the existing.

rather than a reducer I'd use a 2"x1.5"x1.5" santee. the upside down santee because of the direction of air flow is from the vertical to the horizontal.

 

[lojoma]

Ah, I hadn't seen a 2 x 1.5 x 1.5 santee...I'll go find one. Thanks for the advice.

 

[jimi]

Wye, santee, p and u traps

I am lost with all these plumbing terms such as Wye and santee etc.
Can someone put that in FAQ with drawing and functions. So that newbies like me can be educated.

 

[Cwhyu2]

Sanitary tee p-trap looks like a P a U bend is the bottom of any trap.

 

[FloridaOrange]

I am lost with all these plumbing terms such as Wye and santee etc.
Can someone put that in FAQ with drawing and functions. So that newbies like me can be educated.

A santee is a tee with a slight bend to it where it meets the other pipe, doesn't have a true 90.
A wye looks like a "Y" sort of. Picture a straight pipe with another coming off of it at 45*.

Wye:

Santee (sanitary tees):

Then there are combination fittings - looks like a wye with a 45 on the end. This fitting is used to lessen the # of fittings and mostly can be done with less space than two fittings.

You'll also here the term about a fitting "on it's back" which means the branch off of the main line is facing up.

 

[FloridaOrange]

And just for sh**s and giggles, look at the size of this "tee". Biggest "tee" I've seen in PVC.....

I worked on the design for an airport (RSW Midfield Complex) which had 3 or 4 8" water lines....multiple 24" sanitarys and lots o' greasetraps.

That was alot of fun.