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Thread: Funky S-trap

  1. #1
    Master Home Inspector danrogers's Avatar
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    Default Funky S-trap

    I did a home inspection on a flipped home where they had a licensed master plumber but in a new bathroom. I hit them on the S-trap under the bathroom sink (first picture)Name:  P1010205 (Small).JPG
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Size:  27.7 KB. The agent asked to have the S-trap changed to a P trap. The second picture Name:  P1010190 (Small).JPG
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Size:  44.3 KB shows it is now an S trap with a vent. I also reported the vent stack is too short because it's below the drain flange.
    By the way. They could have used a regular plumbing vent through the roof but they didn't.
    Can somebody tell me if this plumber is all washed up?

  2. #2
    DIY Senior Member Rich B's Avatar
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    I have a similar setup under my kitchen sink......

    I installed it myself.... It never had a vent before and was an S trap and always drained slow.

    There was no way to get up thru the roof with a proper vent. The drain is in the floor not the wall and the sink is on the first floor.. so I added a Studor AAV. Mine is above the bottom of the sink and the trap arm is longer....

    Mine sink drains perfect...no smells.....5 years at least working fine.....

  3. #3
    Plumbing Contractor for 49 years johnjh2o1's Avatar
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    In many ares studor vents are legal. The only requirement is that they are accessible. They do not have to be above the flood level of the fixture.

    John

  4. #4
    In the Trades Gary Swart's Avatar
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    Have you guys noticed the Kohler TV ad where they depict a vanity sink on the top floor that has no trap at all? Drain goes down below the sink then elbows 90 deg for a few inches then elbows straight down and through the floor. I know it's just an advertisement for their Kohler products, but the lack of trap really jumped out at me.

  5. #5
    Test, Don't Guess! cacher_chick's Avatar
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    The mechanical vent is allowed in some places and not in others. IMO, it makes sense to use one when installing a real vent is not cost effective for a remodel, but I believe it should be avoided whenever possible.

    IMO, one improvement to the one in the picture would be to get the vent up as high as possible under the cabinet to help prevent it from becoming contaminated if their were a minor back-up. If any solids get stuck up in the AAV, it will not seal and then the sewer gas will be leaking in.

  6. #6
    Expert Plumber plumber2011's Avatar
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    Hi all:

    I don't know...I see this as a vented STRAP. I mean, doesn't the vent have to be at least 2 pipe diameters from the wier of the trap? Here, that would mean that the trap arm needs to be a minimum of 3 inches (1.5" pipe x 2), otherwise, it's an STRAP, right?

    Also note that the manufacturer's of AAVS only require that the AAV be installed a minimum of 4-6" above the crown of the trap so the height of the AAV is OK, but I do agree with Cacher_Chick that the AAV is better up higher, for sure!

    That's my thoughts here!

  7. #7
    Moderator & Master Plumber hj's Avatar
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    quote; would mean that the trap arm needs to be a minimum of 3 inches

    The DISTANCE between the trap's "U" and the riser would have to be 3", not the branch pipe itself. IN the second picture, it appears that the water lines "grew" since the valves are now higher above the floor than in the first picture. If the original "plumber" installed that "S" trap, then he was NOT a very good plumber, assuming he was actually a plumber in the first place. but then, how many "flippers" hire professional tradesmen for their projects. They look for low price first, and accept whatever quality they get as a bonus.
    Last edited by hj; 06-29-2011 at 06:23 AM.

  8. #8
    In the Trades Tom Sawyer's Avatar
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    the distance from the trap ell to the san tee needs to be twice the pipe diameter or you have an s trap

    The height of the AAV is fine although I like to get them as high as possible.

    I doubt that a licensed plumber did the work. How many plumbers use blue waterproof glue on an interior joint?

    Nice PEX job also. So neat and professional looking LOL

    Ever wonder why the trade is dying? Perfect example above. Nobody gives a crap what things look like as long as they work which by the way the S trap in the first picture would have worked just fine, just not to code.

  9. #9
    DIY Senior Member BobL43's Avatar
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    Default Trap glue job

    Quote Originally Posted by Tom Sawyer View Post
    .

    I doubt that a licensed plumber did the work. How many plumbers use blue waterproof glue on an interior joint?

    Nice PEX job also. So neat and professional looking LOL

    Ever wonder why the trade is dying? Perfect example above. Nobody gives a crap what things look like as long as they work which by the way the S trap in the first picture would have worked just fine, just not to code.

    Hi Tom, you brought up something I was wondering about: on a solvent glue PVC trap like that, where it would show, what is the correct glue to use without the primer color showing? I will be installing a pedestal sink where the trap would be visible, and was not planning on using a chrome trap, as I think the white PVC would look OK with the white china sink. Is it OK to use the clear solvent glue by itself for a trap?
    Thanks.
    I am definitely not a pro plumber, but I am a pro crastinator

  10. #10
    In the Trades Tom Sawyer's Avatar
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    If you must use a glued trap you can use clear glue and primer or a plastic tubular trap that uses slip joints but I think you will find that chrome looks a whole lot better.

  11. #11
    Moderator & Master Plumber hj's Avatar
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    I REMOVE sch 40 sink drains and traps, I do not install them. Chrome tubular traps make a much nicer installation. The whole installation from the oversized pipe openings without trim escutcheons to "S" trap and the "spaghetti" like water piping smacks of DIYer or handyman, NOT any self respecting professional plumber. If I did something like that I would be sure to leave one of my competitors business cards there.
    Last edited by hj; 06-29-2011 at 05:48 PM.

  12. #12
    In the Trades Tom Sawyer's Avatar
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    And don't trying to snake a glued up trap piss you right off

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    DIY Senior Member BobL43's Avatar
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    thanks guys, sounds like good advice. she wants oil rubbed bronze fittings in the new bathroom anyway, so brass it will be for the trap as well in the ORB finish and angle stops as well.
    I am definitely not a pro plumber, but I am a pro crastinator

  14. #14
    Moderator & Master Plumber hj's Avatar
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    quote; And don't trying to snake a glued up trap piss you right

    Not a bit, because my SawZall is the FIRST tool used on it. After that the snake goes right in.

  15. #15
    DIY Senior Member BobL43's Avatar
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    Quote Originally Posted by hj View Post
    quote; And don't trying to snake a glued up trap piss you right

    Not a bit, because my SawZall is the FIRST tool used on it. After that the snake goes right in.
    Well if I HAD used a PVC trap, it would have been the type where the U piece is removable. I know what I posted originally and saw that photo, but I meant the solvent joint at the arm into the wall santee, and was concerned as you mentioned above that the trim plate would not cover that joint. Anyway, it will be a brass trap when I do it. I love my Sawzall too. It is an older 2 speed model from '79
    I am definitely not a pro plumber, but I am a pro crastinator

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