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347
347 Member Posts: 151
in Plumbing

Hello All,

I am on a job on the north shore of Long Island. It is installed after the housetrap before the main 4" waste stack for two second floor bathrooms but before a slop sink and washing drainpipe in the basement.

Any help would be appreciated.

Thank you 

Drain1.jpg Drain2.jpg Drain3.jpg Drain4.jpg Drain5.jpg Drain6.jpg

Comments

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,734

    Grease trap.

    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Jamie Hall
    Jamie Hall Member Posts: 27,395

    And clean it out. Which won't be any fun at all….

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Larry Weingarten
    Larry Weingarten Member Posts: 4,116

    Hi, Good chance you'll want some ventilation going when you open it up. Who knows, maybe that long-lost gold ring is in there 🤩

    Yours, Larry

  • 4GenPlumber
    4GenPlumber Member Posts: 175

    That looks like a separator (probably not for grease), also not after a house trap. If that's the kitchen and laundry going into it, its like a gray water tank, but tied into the sewer...weird. pour some bleach into the laundry tray before opening it, and take pics when its opened.

  • hot_rod
    hot_rod Member Posts: 27,501

    Looks like a plaster trap (solids interceptor) possibly. They were used at some sinks in medical facilities.

    Or a pottery person lived there and used the sink for clean up?

    Or a grease trap.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Steamhead
    Steamhead Member Posts: 18,525

    I agree- grease trap. And yes, that's the same Standard Sanitary Manufacturing Co. that later became half of American-Standard.

    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • mattmia2
    mattmia2 Member Posts: 16,890
    https://forum.heatinghelp.com/discussion/comment/1891983#Comment_1891983

    weren't they still branding stuff standard sanitary fixture and arco for decades after they merged?

  • Steamhead
    Steamhead Member Posts: 18,525

    In some cases. But it could help us date when the house was built. That merger happened in 1929 IIRC.

    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • mattmia2
    mattmia2 Member Posts: 16,890

    i've seen fixtures branded "standard" in buildings built in the 50's or 60's

  • Steamhead
    Steamhead Member Posts: 18,525

    That was one of the last of their product line to make the change- in 1963 IIRC. But their heating equipment had both names decades earlier.

    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • hot_rod
    hot_rod Member Posts: 27,501

    you will know when you open the top if it is a grease or plaster trap

    Grease traps have baffles to slow flow and allow grease to rise or float up

    A plaster or solid interceptor forces solids to the bottom

    Seems odd to have either trap in a home? Was there a butcher shop in the basement? Or an artist studio?

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • 4GenPlumber
    4GenPlumber Member Posts: 175

    Or a dark room?

  • Tom_133
    Tom_133 Member Posts: 976

    Im excited! will they send pics opened (and cleaned out)???

    Tom
    Montpelier Vt
  • SuperTech
    SuperTech Member Posts: 2,665

    I'm highly intrigued by the prospect of seeing what kind of goodies are uncovered when it's finally opened. I hope @347 isn't just teasing us all.

  • 347
    347 Member Posts: 151

    Thank you all for all the replies.

    I was told the house is around 100 years old. I did not intend or need to be open it up (Pandor's box to me). I was just wondering what it could be and the purpose of it. I find it odd that it is 4", I would think a grease or plaster trap would be smaller. I have installed either, just a thought.

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