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Successfully eliminated “P” trap under sink with Hepvo valve

Dalehelman
Dalehelman Member Posts: 2,414
edited June 2018 in Modifications & Upgrades
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  • Homebodyatheart
    Homebodyatheart Member Posts: 2,516
    @Dalehelman I really like this! Are you dewinterized yet and can play with it with water to see how it performs?
    2017 T@B 320 Max S silver and cherry red, L@dybug ("Bug" aka my esc@pe pod), TV 2015 Toyota Highlander aka Big Red
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  • Dalehelman
    Dalehelman Member Posts: 2,414
    edited March 2018
    Parts list 
    https://www.amazon.com/dp/B00NLMPLDU?ref=yo_pop_ma_swf


    Everbilt 1-1/2 in. Plastic Tee Slip Joint


    See this on Homedepot.com

    OMSID#: 205153788
    Store SKU#: 1000050260

    Qty: 1

    Aisle: 08 Bay: 007


     1-1/2 in. ABS DWV Hub x SJ Trap Adapter


    See this on Homedepot.com

    OMSID#: 100344620
    Store SKU#: 188891

    Qty: 2

    Aisle: 09 Bay: 011

    Everbilt 1-1/2 in. x 12 in. PVC Solvent-Weld-Joint Extension Tube


    See this on Homedepot.com

    OMSID#: 205154042
    Store SKU#: 1000050266

    Qty: 1

    Aisle: 08 Bay: 007


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  • Photomom
    Photomom Member Posts: 2,217
    You are awesome!!!
    John and Henrietta, Late 2016 T@B S Max in Western New York
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  • Dalehelman
    Dalehelman Member Posts: 2,414
    Photomom said:
    You are awesome!!!
    Thanks for turning me on to the Hepvo.
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  • Dalehelman
    Dalehelman Member Posts: 2,414
    @Homebodyatheart
    works as advertised. Garage never gets below 40*. IMHO it would ok to dewinterize now. Even if it were to drop below freezing at night it wouldn’t be long enough to do any damage.
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  • ChanW
    ChanW Member Posts: 3,165
    Dale, that's excellent! I had no idea such a device existed!

    About a year ago, I bought all the parts I'd need to reroute the drain and trap under the kitchen sink (ours drains toward the front of the cabinet).

    Haven't got a round tewitt though, of course, and now I have to find a use for all those parts, cuz this is a much better solution!

    Thanks Dale. Love it!
    Chan  -  near Buffalo NY
    2014 S Maxx
    2011 Tacoma 4cyl ... edit: 2022 Tacoma 6cyl - oh yeah! 

     A_Little_T@b'll_Do_Ya
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  • marknjudy
    marknjudy Member Posts: 378
    edited March 2018
    @Dalehelman I can’t make it this weekend but I’ll be there next week end. Beverages and food of your choice plus..

    ok not really, but I’m gonna study these
    pics in great and see if I can maybe try once more. Great work!
    Mark - 2016 T@b Max S (Silver/Red), 2012 F-150
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  • ChanW
    ChanW Member Posts: 3,165
    edited March 2018
    Dale, there's a bit of a contradiction in your illustrations vs parts list...

    The slip tee you used in your installation photos looks to be part of a 'slip tee / waste outlet' fitting. ie:
    LDR 506 6135 PVC Slip Connect End Outlet Waste Tee 1-12-Inch
    Wouldn't that be easier than the triple-slip tee?

    Also, a question. The el between the sink outlet and the Hepvo is a slip fitting, isn't it? How do you seal the threaded sink outlet to the slip-fitting el? 
    edit: I now see, it's not a slip-joint. I found the video here.
    Chan  -  near Buffalo NY
    2014 S Maxx
    2011 Tacoma 4cyl ... edit: 2022 Tacoma 6cyl - oh yeah! 

     A_Little_T@b'll_Do_Ya
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  • ChanW
    ChanW Member Posts: 3,165
    Note the Hepvo is a couple dollars cheaper directly from their website, here: http://hepvo.com/buy-now/
    Chan  -  near Buffalo NY
    2014 S Maxx
    2011 Tacoma 4cyl ... edit: 2022 Tacoma 6cyl - oh yeah! 

     A_Little_T@b'll_Do_Ya
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  • jkjenn
    jkjenn Member Posts: 6,417
    Dale, this might be your best mod, yet!!

    2021 T@b 320 Boondock "Mattie Ross" | 2021 T@b Nights: 239 | Total nights in a T@b 455 | 2022 Jeep Grand Cherokee L Overland | T@b owner since 2014

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  • Dalehelman
    Dalehelman Member Posts: 2,414
    ChanW said:
    Dale, there's a bit of a contradiction in your illustrations vs parts list...

    The slip tee you used in your installation photos looks to be part of a 'slip tee / waste outlet' fitting. ie:
    LDR 506 6135 PVC Slip Connect End Outlet Waste Tee 1-12-Inch
    Wouldn't that be easier than the triple-slip tee?

    Also, a question. The el between the sink outlet and the Hepvo is a slip fitting, isn't it? How do you seal the threaded sink outlet to the slip-fitting el? 
    edit: I now see, it's not a slip-joint. I found the video here.
    Very true I can’t get anything by some of you. In my case I did use a T like you picture d. Instead of the slip fit T in the parts list. I all ready had one and it saved me a trip to HDI
    placed it in the inverted position. By doing that it was necessary remove the baffle inside it with a small grinder. The standard slip T should be easier for the average person. Either way will get the job done.
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  • Dalehelman
    Dalehelman Member Posts: 2,414
    If you do this mod. Be advised that it is necessary to reconnect the vent pipe at the top of the T fitting.

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  • ChanW
    ChanW Member Posts: 3,165
    I was sure that 39923 195944 bar code sticker was an important part of it, since it wasn't there in the earlier photo...  =)

    Chan  -  near Buffalo NY
    2014 S Maxx
    2011 Tacoma 4cyl ... edit: 2022 Tacoma 6cyl - oh yeah! 

     A_Little_T@b'll_Do_Ya
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  • hymie
    hymie Member Posts: 150
    @Dalehelman Beautiful work (as usual!). Any concerns about odour from the grey water tank?
    James & Jacquie     Almonte, Ontario
    2016 Jeep Cherokee & 2017 T@B Outback
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  • Dalehelman
    Dalehelman Member Posts: 2,414
    hymie said:
    @Dalehelman Beautiful work (as usual!). Any concerns about odour from the grey water tank?
    None take time to watch @ChanW video posted above.
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  • Photomom
    Photomom Member Posts: 2,217
    Dalehelman said:
    If you do this mod. Be advised that it is necessary to reconnect the vent pipe at the top of the T fitting.

    According to a couple videos I’ve watched, the hepvo valve makes that vent pipe unnecessary. Would you comment?

    https://m.youtube.com/watch?v=yfYwmKnWXXw
    John and Henrietta, Late 2016 T@B S Max in Western New York
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  • ChanW
    ChanW Member Posts: 3,165
    edited March 2018
    @Photomom, I wondered the same thing, but got to thinking (uh oh). It's a possiblility that that vent pipe is the main 'stack' vent for the gray water.

    IOW, the shower drain might also depend on that vent pipe. (I haven't looked in that wall behind the toilet in a while).

    But, on second thought (uh oh!), combining a drain and a vent like that might be unacceptable...
    Chan  -  near Buffalo NY
    2014 S Maxx
    2011 Tacoma 4cyl ... edit: 2022 Tacoma 6cyl - oh yeah! 

     A_Little_T@b'll_Do_Ya
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  • hymie
    hymie Member Posts: 150
    edited March 2018
    @Dalehelman aahhhh. Comprehension dawns..... Ok. Another DH mod to add to the list. :) Thanks!
    James & Jacquie     Almonte, Ontario
    2016 Jeep Cherokee & 2017 T@B Outback
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  • hymie
    hymie Member Posts: 150
    edited March 2018
    Sigh... Like the discharge mod in that a shopping trip south may be in order. The challenge of living in the land of snow.... Good to know that direct purchase is an option because Amazon.ca is not.
    James & Jacquie     Almonte, Ontario
    2016 Jeep Cherokee & 2017 T@B Outback
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  • ScottG
    ScottG Administrator Posts: 5,655
    edited March 2018
    ChanW said:
    @Photomom, I wondered the same thing, but got to thinking (uh oh). It's a possiblility that that vent pipe is the main 'stack' vent for the gray water.

    IOW, the shower drain might also depend on that vent pipe. (I haven't looked in that wall behind the toilet in a while).

    But, on second thought (uh oh!), combining a drain and a vent like that might be unacceptable...
    If my plumbing schematic is to be believed, the gray tank (and by association the shower) do indeed vent up past the sink drain.

    So, while the Hepco valve itself may not require a vent, you should still reconnect as Dalehelman has.

    Draining into a pipe that serves as vent for a fixture lower down is called "wet venting." Residential plumbing codes do prohibit it in certain situations, but I don't recall the specifics. I think it has to do with toilets on upper floors, so unless you've installed an extra can on the roof of your T@B, you should be good to go.  ;-)
    2015 T@B Max S (320)
    2015 Nissan Frontier SV V6 4x4
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  • ChanW
    ChanW Member Posts: 3,165
    $216!?! What the heck is that about?

    Must be the new tariffs! Jeesh!

    I might just have to go into smuggling over the Peace Bridge. I'd clearly be able to make some good money! (JUST KIDDING, Customs Officer, sir!)
    Chan  -  near Buffalo NY
    2014 S Maxx
    2011 Tacoma 4cyl ... edit: 2022 Tacoma 6cyl - oh yeah! 

     A_Little_T@b'll_Do_Ya
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  • Dalehelman
    Dalehelman Member Posts: 2,414
    ScottG said:
    ChanW said:
    @Photomom, I wondered the same thing, but got to thinking (uh oh). It's a possiblility that that vent pipe is the main 'stack' vent for the gray water.

    IOW, the shower drain might also depend on that vent pipe. (I haven't looked in that wall behind the toilet in a while).

    But, on second thought (uh oh!), combining a drain and a vent like that might be unacceptable...
    If my plumbing schematic is to be believed, the gray tank (and by association the shower) do indeed vent up past the sink drain.

    So, while the Hepco valve itself may not require a vent, you should still reconnect as Dalehelman has.

    Draining into a pipe that serves as vent for a fixture lower down is called "wet venting." Residential plumbing codes do prohibit it in certain situations, but I don't recall the specifics. I think it has to do with toilets on upper floors, so unless you've installed an extra can on the roof of your T@B, you should be good to go.  ;-)
    @ ScottG thanks for answering the question. You did it better than I could have. I tried without. The water entering the gray tank forced the air up through the shower drain. Correct that vent is needed for the shower.
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  • ScottG
    ScottG Administrator Posts: 5,655
    Thanks, @Dalehelman. I always appreciate a good "try it and see what happens" to back up the theory. Now we know!
    2015 T@B Max S (320)
    2015 Nissan Frontier SV V6 4x4
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  • rfuss928
    rfuss928 Member Posts: 1,180
    The Dutchman T@Bs have a strainer/sink adapter that includes a check valve style waterless trap.  In the picture it is the round bottom white unit on the bottom of the sink.  The entire drain plumbing is the corrugated grey hose leading to a 3/4 inch threaded hose connection beneath the trailer.



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  • dsatwork
    dsatwork Member Posts: 744
    @Sandiegogal Our next mod......this will eliminate the weird smell in the trailer. HepvO® valve.... who knew this even existed? The HepvO® valve means enhanced plumbing design and system efficiency, without compromising performance or risking the escape of foul air into the living space from the drain or sewer.
    2017 Tab Basic S Silver on Silver with Sofitel Cushions....upgraded from 2013 LG 5W....Towed by a 2016 Sorento V6 AWD w/5000lb tow capacity. Dave S. married to Jen aka SanDiegoGal We pull a Tab but live in a 2014 Airstream International Signature 27 FBQ...Talk about embracing a trailer lifestyle.
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  • Dalehelman
    Dalehelman Member Posts: 2,414
    rfuss928 said:
    The Dutchman T@Bs have a strainer/sink adapter that includes a check valve style waterless trap.  In the picture it is the round bottom white unit on the bottom of the sink.  The entire drain plumbing is the corrugated grey hose leading to a 3/4 inch threaded hose connection beneath the trailer.



    I assume you have know holding tank. If that is true then no “P” is needed 
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  • NHCraig
    NHCraig Member Posts: 28
    Very cool, but I have to admit I'm not sure what the reason was - is this a plumbing improvement, or done to buy more storage space under the sink?
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  • Dalehelman
    Dalehelman Member Posts: 2,414
    edited March 2018
    More storage easier access.
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  • jkjenn
    jkjenn Member Posts: 6,417
    @Dalehelman in the third picture, on the floor of the cabinet, are those shavings from having to cut something?

    2021 T@b 320 Boondock "Mattie Ross" | 2021 T@b Nights: 239 | Total nights in a T@b 455 | 2022 Jeep Grand Cherokee L Overland | T@b owner since 2014

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  • Dalehelman
    Dalehelman Member Posts: 2,414
    edited March 2018
    jkjenn said:
    @Dalehelman in the third picture, on the floor of the cabinet, are those shavings from having to cut something?
    Yes it is necessary to cut 8” from the drain pipe. It is important to make the top cut  3/4” from the top 45* elbow.


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