Big Dipper Drain Pump Kit



The Big Dipper Drain Pump Kit allows you the freedom to install Big Dipper where gravity drain lines are not available. The kit includes: 
The W-250-IS Automatic Grease Removal Device, which is rated to the PDI-G 101, and ASME A112.14.3 and A112.14.4 standards and is capable of accepting up to a 25 GPM (1.58 l/s) flow while holding more than 56.4 lbs. (25.6 kg) of grease.  The center module which comes with digital time control, heater assembly, and mechanized skimming assembly, automatically isolates trapped grease into grease collector for easy disposal.
  • Advanced Odor Protection* (patent-pending) keeps odors inside the tank and out of the kitchen.
  • Fully automatic self-cleaning cycle. Removes collected grease & oils from tank without any operator assistance. Comes complete with a digital control interface and Grease Collector.
  • Constructed of corrosion-resistant materials suitable for installation in virtually any location. Attractive sanitary Stainless Steel exterior.
  • Integrated Motor/Grease Outlet/Heater/Lid enables a fast, do-it-yourself unit operation reversal.
  • Compact footprint.
  • Two (2) No-Hub Connectors provided.

The LP-405 pump by Liberty Pump, a specially designed commercial drain pump built to perform in high-head, high-temperature situations. Liberty's QuickTree® Technology provides a separate access cover for easy switch inspection.

The SFK-LP support stand, which raises the Big Dipper W-250-IS off the floor directly at the source to accommodate water flow to the Liberty Pump Model 405. The sturdy, compact design lends itself easily to tight situations. 


*Advanced Odor Protection prevents odors from escaping through the lid of the Big Dipper but does not prevent odors related to the rest of the plumbing system including but not limited to: open floor drains, air gaps, external solids straining devices, improper venting, and odors generated elsewhere in the plumbing system.


Exterior: 304 Stainless Steel, Bright Finish
Interior: Rotationally Molded Polyethylene

Electrical:  115 VAC, 50/60 Hz, 1173 Watts (10.2 Amps)*

Maximum Inlet Flow Rate:  25 GPM (1.58 l/s)

Number of Skimming Wheels:  1

Skimming Rate:  9 Pounds Per Hour (4.08 Kg Per Hour)

Grease Retention Capacity:  56.4 Pounds (25.6 Kg)

Internal Solids Strainer Capacity:  1.85 Gallons (7 L)

Product Weight:  48 Pounds (21.7 Kg)

Thermaco Big Dipper Model No. W-250-IS, bright finish type 304 stainless steel exterior, rotationally molded polyethylene interior automatic self-cleaning grease and oil recovery separator(s) for floor mounted or partially recessed installation, rated to ASME A112.14.3 and/or PDI-G 101 standards at 25 gallons per minute (1.58 liters per second) peak flow with 56.4 Pounds (25.6 Kg) of grease capacity and including as an integral part of the unit, 2” (50 mm) inlet/outlet, 1 rotating gear oleophilic/hydrophobic skimming wheel assembly for automatic grease/oil removal, flow control device, self-regulating electric immersion heater with thermostatic control, 1” (25mm) vessel vent, integral gas trap, digital control for programmable operation, field reversible motor assembly and grease/oil sump outlet, quick release stainless steel lid clamps, fully removable polymer lid with magnetic lid tensioners, internal polymer/stainless steel strainer basket for collection of coarse solids, polymer wiper blade unit and a separate gasketted removable grease and oils collection container with carry handle and pouring spout. Electric assembly shall be tested to comply with pertinent sections of the Standards for Safety ANSI/UL 73 and/or ANSI/UL 1004. Electric motor equipped with overload protection. Two (2) no-hub connectors for plumbing connection provided.














Icon Label Description Type Size Download
W-250-IS-SPEC W-250-IS Specification Sheet pdf 433.3 KB Download
Manual for 51k Series Internal Strainer (IS) Units (Jan. 2021) Installation & Operation Instructions For Big Dipper 51k Series Internal Strainer (IS) Units pdf 1.3 MB Download
LP-405 Manual Operation and installation instructions for the Liberty Pump LP-405 pump. pdf 1.2 MB Download
LP-405-SPEC Measurements and other details for the Liberty Pump LP-405 pump. pdf 631 KB Download
LP-405 Brochure Features and benefits of the Liberty Pump LP-405 pump. pdf 1009 KB Download
SFK-LP-SPEC Measurements and other details for the SFK-LP Support Kit pdf 323.1 KB Download
Drain Pump Kit Insert 1-Page Summary pdf 1.1 MB Download

Choose the CAD format first and then click 'Download CAD' to get drawing.

If CAD/DWG tool is not loading properly, visit the Specifications Page and click View CAD File next to model desired.

Your browser does not support WebGL, please use a Modern Browser