THE HULK COUPLING
Universal Sewer and Drain Repair Coupling.

One coupling per nominal pipe size connects:

  • Clay
  • Concrete
  • Ductile Iron
  • Orangeburg
  • Duriron
  • Cast Iron
  • Steel
  • Plastic
* See chart for specific connections
Part Number Size Dimensional Range
HULK4 4” 5.60” - 4.20”
HULK5 5” 6.70” - 5.30”
HULK6 6” 8.00” - 6.20”
HULK8 8” 10.15” - 8.40”
HULK10 10” 12.75” - 10.50”
HULK12 12” 15.30” - 12.50”
HULK4-Pair-4-19-24.png

Benefits

  • UNMATCHED QUALITY & PERFORMANCE: Built to last the life of the plumbing system, Fernco couplings are made from elastomeric polyvinyl chloride for a strong, leak-proof fitting that’s resistant to chemicals and sewer gases.
  • CONNECT VARIOUS PIPE TYPES: One universal coupling per nominal size connects most pipe materials
  • SPECS & CODES: Complies with IPC, UPC, ASTM C 1173 AND CSA B602
  • HEAVY DUTY CONSTRUCTION: Stainless Steel Ribbed Construction with corrosion resistant high torque 316 series stainless steel clamps
  • PATENTED DESIGN: U.S. Pat. No. D956937

Videos

Compatibility Chart

Hulk Coupling Product Image

Please side-scroll to view entire chart
  HULK4 HULK5 HULK6 HULK8 HULK10 HULK12
COUPLING RANGE 5.60” - 4.20” 6.65” - 5.30” 8.00” - 6.20” 10.15” - 8.40” 12.75” - 10.50” 15.30” - 12.50”
CLAY 4” 5” 4” 5” 6” 4” 5” 6” 6” 8” 10” 12” 10” 12” 14” 15”
Eastern Standard Clay 5.23     6.31     6.31 7.44   9.84 11.99     14.36    
Pacific Clay 5.36   5.36         7.93   9.93     12.88 15.30    
Gladding McBean Clay 5.31   5.31         7.87     12.47     14.52    
Building Products Clay 5.20             7.75   9.80 12.40     14.40    
Can Clay Denlok           7.64     9.88       13.82      
Mission Clay 5.37   5.37 6.65     6.65 7.68   9.90 12.43     14.46    
Mission No Dig                         13.50      
Logan Clay 4.92             7.52   9.70 12.08     14.36    
CAST AND DUCTILE IRON 4” 5” 4” 5” 6” 4” 5” 6” 6” 8” 10” 12” 10” 12” 14” 15”
Ductile Iron 4.80             6.90   9.05 11.10     13.20 15.30  
Duriron 4.76       6.69     6.69   9.02 11.25     13.25    
Extra Heavy Cast Iron 4.50 5.50   5.50 6.50     6.50   8.62 10.75 12.75   12.75    
Service Weight Cast Iron 4.30 5.30   5.30 6.30     6.30   8.38 10.50 12.50   12.50    
No Hub Cast Iron 4.38 5.30   5.30 6.30     6.30   8.38 10.56 12.50   12.50    
STEEL 4” 5” 4” 5” 6” 4” 5” 6” 6” 8” 10” 12” 10” 12” 14” 15”
Stainless Steel 4.50 5.563   5.56 6.625     6.625   8.625 10.75 12.75   12.75    
Steel 4.50 5.563   5.56 6.625     6.625   8.625 10.75 12.75   12.75 14.00  
COPPER 4” 5” 4” 5” 6” 4” 5” 6” 6” 8” 10” 12” 10” 12” 14” 15”
Rigid Copper (TYPES K,L,M)   5.125     6.125         8.125            
PLASTIC 4” 5” 4” 5” 6” 4” 5” 6” 6” 8” 10” 12” 10” 12” 14” 15”
SDR-35 ASTM-3034 4.22       6.28     6.28   8.40 10.50 12.50   12.50   15.30
PS-46, PS-75, PS-115 (ASTM-F679)                                
Thinwall Plastic (S&D)   5.30   5.30 6.27     6.27   8.16            
Plastic Schedule 40, 80, 120 4.50 5.563   5.56 6.625     6.625   8.625 10.75 12.75   12.75 14.00  
HDPE Pipe (DIPS) 4.80             6.90   9.05 11.10     13.20 15.30  
HDPE Pipe (IPS) 4.50 5.56   5.56 6.63     6.63   8.63 10.75 12.75   12.75 14.00  
ULTRA RIB™                   8.81 11.02     13.10    
ULTRA CORR™                                
C900 AND C905 4.80             6.90   9.05 11.10     13.20 15.30  
CONTECH A-2000™ 4.30       6.42     6.42   8.60 10.79     12.80    
Royal Kor Flo™                   8.60 10.78     12.79    
ARMCO TRUSS                   9.40 11.80     14.10    
CONCRETE 4” 5” 4” 5” 6” 4” 5” 6” 6” 8” 10” 12” 10” 12” 14” 15”
CONCRETE
Dimensions will vary by manufacturer and class of pipe

5.50

MIN

 

5.50

MIN

6.50

MIN

   

6.50

MIN

7.75

MIN

 

10.00

MIN

12.45

MIN

   

14.50

MIN

   
ORANGEBURG 4” 5” 4” 5” 6” 4” 5” 6” 6” 8” 10” 12” 10” 12” 14” 15”
Orangeburg Bituminous Fiber
(Actual sizes may be larger than stated size)
4.64     5.82       6.96   9.14