Geoprobe® style stainless steel check valve uses 3/8 OD Tubing. The maximum OD of the check valve is 0.44" Recomended tubing: 1/4" ID x 3/8" ODHDPE (High Density Poly)LDPE (Low Density Poly)FEP (Teflon) The Micro Flow System is popular for use in direct push technology micro well installations. This footvalve can deliver a sample from as deep as 75 feet and flow rates with this system are usually less than 1/2 gallon per minute. Also known as a Foot Valve or Inertial Pump
