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Dual Column 4 lb Closed Loop Hydrocarbon BHO Extractor

The 4lb closed loop hydrocarbon extraction system performs botanical extraction within a sealed, vacuumed system. Utilizing both bottom and top-fill input, solvent washes thru the material column, collecting oils as it passes over the material. Oil bearing solvent is collected in the collection base under the material column. Once collected, solvent is distilled and recovered, leaving the oils in the collection base. 

Every Emerald Gold Closed Loop Extractor is built with 304 Stainless Steel and tested for 24 hours under pressure and vacuum. Each column holds approx. 900 grams plant material allowing for 4 lb. runs with both columns. This closed loop extractor has been designed to allow switching of columns during a run to be able to extract more. Built with a splatter platter collection base that separates to allow you to safely deposit your extract and start again in minimal time. Our Dual Column BHO Extractor is Bi Directional allowing you to flood from both the top and bottom for full extractions.

Every Dual column 4 lb. Closed Loop Hydrocarbon BHO Extractor comes with:

  • (2)3" x 36" Tri Clamp Columns
  • (2)3" Filter Plates
  • (2)1.5" to 3" reducers
  • (3) Compound Gauges
  • (6)1/4" WOG Valves
  • (2) 2" to 3" End Cap Reducer
  • (2) 1/4" Tee
  • (5) 1/4" MNPT x 1/4" MNPT
  • (2) 2" High Pressure Clamps
  • (2) 3" High Pressure Clamps
  • (3) 6' x 1/4" PTFE Lined Stainless Steel Braided Hoses
  • (4) 3" Tri Clamps
  • (8) 1.5" High Pressure Clamps
  • (1) 1.5" Tee
  • (2) 1.5" Tri Clamp 90 Degree
  • (2) 1.5" Ball Valves
  • (1) 8" x 6" Spool
  • (1) 8" x 6" Splatter Platter Base
  • (2) 8" High Pressure Clamps
  • (1) 3/8" WOG Valve
  • (3) 3/8" MNPT x 1/4" FNPT Bushings
  • (1) 3/8" x 3/8" MNPT
  • (1) 3/8" Cross
  • (6) 1/4" MNPT x 1/4" MJIC
  • (1) Welded 8" Extractor Lid


Tri Clamp sizes are determined by the outer diameter of the pipe or tubing, not the outer diameter of the flange or Tri Clamp itself. The flange of a Tri Clamp fitting typically has about a ½” inch greater diameter than the outside diameter of the pipe. This can become especially confusing when the Tri Clamp fitting has no pipe attached to it, as is the case with adapters, For instance, a 1.5" Tri Clamp to 1/2" hose barb adapter is not 1.5" inches in any dimension, but the Tri Clamp end will fit any other 1.5" Tri Clamp fitting. 

If you have any doubts about what size Tri Clamp fittings your project needs, simply measure the outside diameter of the flange (dimension "B" below) and consult the chart below, or feel free to contact us .



Pipe Outer Diameter

Flange Outer Diameter

Pipe Inner Diameter
































Emerald Gold is proud to offer customization of every extractor. Call us today at 417-778-1589 or by to see how we can help you today!!!



Depending on the type of oil you are extracting, these product(s) may not be legal to operate in some areas. For safety reasons, these product(s) are designed and intended for outdoor use only. Emerald Gold, LLC strongly discourages any unlawful use of these product(s), and is not responsible for any damage or injury caused by the misuse or unlawful use of these product(s). Any person or entity that uses the equipment and/or information provided by Emerald Gold, LLC does so entirely at their own risk, and accepts all liability concerning the use of the product(s) and information listed above.

*WARNING* Never extract with butane or propane indoors. May cause serious injury, or even death.

Free, Fast Local Shipping

All continental US orders over $99 qualify for free shipping.

Discreet Shipping

We understand the importance of privacy to many of our customers. All orders placed on Growbuds are shipped in plain boxes without explicit identifying marks.

Estimated Arrival

Between 1 and 5 business days, depending on your location.

Easy Returns

For up to 90 days, depending on the brand.


Please refer to our Shipping & Returns policy page for more detailed information.

All products sold on Growbuds are subject to the respective manufacturer’s warranty policy, which can be found on manufacturers websites or by contacting them. If your product fails in the remainder of our returns period, the manufacturer's warranty policy will prevail. In this case, send us an email at and we will assist you in your warranty claim by helping you coordinate with the original manufacturer.

Our experienced commercial team has helped supply hundreds of indoor, outdoor and commercial greenhouses projects in Canada and the United States.

Looking to get a quick quote? Contact us at or call at 1-877-900-2632 option 2 to talk with a Growbuds sales representative. Otherwise please fill out the quick form below and we will be in touch as soon as possible.

United States Headquarters

2915 Ogletown Road
Newark, DE 19713, United States

Canada Headquarters

295 Cure-Labelle Boulevard,
Laval, QC H7L 2Z9, Canada

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Toll Free: 1-877-900-2632
Hours: 9AM - 5:00PM EST

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We are here to help and want the best for you. Use our live chat, email us at or call us at 1-877-900-2632 during business hours. We are always here for you.

Full Warranties and Generous Return Policies

We only carry top American brands that back their products with full warranties and return policies of up to 90 days, depending on the brand.

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Price Match

We want you to be absolutely secure that you're getting the best price with us, so we will not only match a lower price you find online before purchase, but will even refund you the difference up to a month after purchase.

Discreet Insured Shipping

All orders ship via FedEx, UPS, and USPS, or a reputable freight company and the shipment is always insured, so you do not have to worry about a lost or damaged package. You also don't need to worry about prying eyes: all orders ship discreetly.

Hassle-Free Returns

For up to 90 days, please refer to our Shipping & Returns policy page for more information.

Free Shipping

On orders over $99 to the lower 48 states.

No Sales Tax Anywhere

Except for MI, and CA for some brands.

Authorized Dealers

We only carry American brands whose lights and other products have been extensively tested by real growers and processors. 100% US warranty on all products.

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Free Fast US Delivery
For Orders Over 99$

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