Listed below are all check valves approved for use in Minnesota when applying fertilizer and pesticide products. The list is updated periodically, so before buying any check valve please check with the MDA to see if the check valve you are considering continues to be approved. Fertilizer applications require one check valve and pesticide applications require two check valves. Please post and retain for your records. A print-friendly version is available.

Check Valve Size Tested Approved
Gheen CMV-FL6   12-9-2014 3-18-2015
Gheen CV-FL8 6 inch 2-5-2015 3-18-2015
Gheen CMV-FL4 4 inch 6-4-2015 8-24-2015
Gheen CMV-FL10 10 inch 6-4-2015 8-24-2015
Gheen CMV-FL12 12 inch 6-4-2015 8-24-2015
Kroy SH300006 8 inch    
Kroy SH340006G      
Midwest CV-1000-AP06 6 inch 2/08/2002 2/25/2002
Valmont KA001150      
Kroy SH300008      
Kroy SH340008G      
Midwest CV-1000-AP08 8 inch 2/08/2002 &  2/12/2002 2/25/2002
Valmont KA01151      
Kroy SH300010      
Kroy SH340010G      
Midwest CV-1000-AP10 10 inch 2/08/2002 2/08/2002
Valmont KA01152      
Pierce 1775-61 4 inch 7/13/2001 1/02/2002
Pierce 1778-01 6 inch 3/09/1995 1/02/2002
Pierce 1778-02 8 inch 3/09/1995 1/02/2002
Pierce 1778-03 10 inch 3/22/1995 1/02/2002
Waterman CPC-30B 4 inch 1/1991 3/12/2002
Waterman CPC-30B 6 inch 10/21/1988 & 10/25/1988 3/12/2002
Kroy F-F 8 inch 2/1987, 11/1988 12/1988
Midwest Irrigation (CVP) 4 inch 5/1991 6/1991
Midwest Irrigation 6 inch 12/1989, 1/1990 5/1990
Midwest Irrigation 8 inch 10/1989, 11/1989, 1/1990 5/1990
Midwest Irrigation (CVMW) 8 inch 12/1992 12/1992
Midwest Irrigation (CVM) 8 inch 7/1993 8/1993
Midwest Irrigation (CVP) 10 inch 7/1990 8/1990
Midwest Irrigation (CVP) 12 inch 3/1991 4/1991
Pierce (1778-61) 6 inch 3/13/1987 1/1989
Pierce (1778-62) 8 inch 3/6/1987 1/1989
Pierce (1778-63) 10 inch 1/1990 2/1990
Reinke (CV-8) 8 inch 2/1987, 11/1988 11/1988
T-L 6 inch 2/1987, 1/1989 2/1989
T-L 8 inch 12/1986, 1/1989 2/1989
T-L 10 inch 3/1987, 1/1989 2/1989
Valmont (1K0217) 6 inch 7/1991 8/1991
Valmont (1K01819) 8 inch 6/1991 3/1991
Valmont (1K02018) 10 inch 3/1990, 7/1991 8/1991
Water Specialties (ML-CV-S) 6 inch 7/1991 9/1991
Water Specialties (ML-CV-S) 8 inch 6/1991 9/1991
Water Specialties (ML-CV-S) 10 inch 4/1991 9/1991
Water Specialties (ML-CV-S) 12 inch 6/1991 9/1991

NOTES

  1. Kroy manufactures Midwest and Valmont valves. Valves listed for Kroy, Midwest, and Valmont are similar in construction and performance.
  2. This list supercedes all previous lists. Only valves listed are approved for use in Minnesota.
  3. Minnesota law requires all valves to be stamped, tagged, or otherwise marked to indicate working pressure, flow rate, and direction, and date, month and year of manufacture.
  4. Manufacturer valve models previously approved by the MDA as of 12/2000 remain legal for use, provided that they are stamped, tagged, or otherwise marked with the information in #3 above.
  5. For additional information on manufacture valves not listed, contact Jeff Lorentz, Ag Chemical Consultant: 320-223-6547.