max p trap distance from tub drain in arizona??

As stated, I am installing a new tub which has a center drain, the old tub was at one end. The drain is 2". The new drain is approx 2'6" - 3' further away from the existing tub drain?
I cant see where the vent is(drops away from the chopped hole in the slab), my guess it ties into the shower vent approx. another 4' away.

thanks chris

Max length of a 2" trap arm is 5' (from crown weir of PTrap to edge of vent)

trap

You want the "P" trap as close to the tub outlet as possible, or you will get odors from scum buildup between the tub and the trap. Besides making it difficult, if not impossible, to snake the drain if you just offset the pipe from the tub to the trap.

HJ,

THe P trap sits in the slab under a wall into the toilet closet(non bearing). The distance from the P trap (if I dont move it) would be 32"(center of the tub). Probably too far and would be enough for odors. Geez..nothing is simple about this new tub

Chris

Any of you AZ guys know if code requires a pressure balance valve for tub fillers? The tub filler is not anti-scald.

thanks,
Chris

Here are pics of my diliema, the old tub was a fiberglass drop with the drain to the end(near the wall). The new tub has a center drain thus the concern for p trap distance.
I think the vent is tied into the shower another 3.5' away.

Hope the pics help...
Chris

tub

A lot of things during a remodel are PITA's, but that does not mean they should not be done correctly. Move the trap to the new location, BUT, unless the new tub does not have an overflow, (in which case doing it by offsetting the pipe would create a tub that would not drain), the trap has to be under the overflow pipe location, not the tub's drain hole.

HJ,
the freestanding tub has a overflow built in that I believe ties into main drain inside the tub.
Its location is on the side at the center to vs off to one side.
I lost you on the last sentence, the P trap has to be under the overflow pipe and not the main drani?

Chris

The outlet from the tub is usually aligned with the overflow. The p-trap should be directly under the outlet. If you run that through an arm, crud in the arm can start to smell nasty, and it may not drain well.

The tub arrives on Monday, I will have a better idea of what I have to work with.
I agree 100% everything should be done correctly, no sense into this far and not get it right, thus the nature of the post and inquiring people who know what to do right the first time...thansk again for the replies.

Chris

if I saw it right, what those pictures show is that the old tub used to have its P trap aligned pretty much directly under its overflow hole, and not directly under its drain hole. The pipe coming almost straight down from the overflow goes into the P trap opening. There is an offset in that vertical pipe.

Then, I think what hj said is that ya gotta align that P trap opening now to be directly (or with that slight zigzag offset) to be under the new tub's overflow hole. Like the current set up.

Then, what Jimjadnashau said is that ideal would be to put the P trap opening directly under the tub drain hole, which is very often seen, and always advised when possible. The small problem he mentions is that organic matter can stick to the piece of pipe before the P trap, like hair and gray water sediment dust. Not a serious concern, imho.

Although you have very little wiggle room, you do have some. Pivoting the P trap so its opening is under the overflow hole, or under it with a slight offset, seems to be possible, if i read hj's remarks right. It is a couple inches over but it doesn't put your P trap under that concrete.

If this makes sense, then i am happy.

david

attached are pics of the tub, the overflow and drain across the tub vs down its length. My understanding is the P trap will be set in line with the overflow and drain and the drain pipe rotated 90deg back the plumbing stack toward the wall. (see my illustration)
I will have to saw out some slab for the P trap and PEX pines for the tube filler.

Chris

You could use a shoe outlet W/O.

tub

If that tub has an internal overflow, similar to a lavatory, and you offset the drain, you could create the same condition that a double trap would and the tub will either not drain or drain very slowly, at least for the first few minutes.

shoe outlet? you lost me.
HJ, cant I set the p trap right below the drain to avoid this like in the illustration?
Chris