Little Giant CV-10 Check Valve for VCC, VCM, VCMA and VCL-14/24, 1/4" MNPT x 3/8" ID vinyl tubing CHECK VALVE FOR WATERS: The Little Giant CV-114/112 check valve model number 599059 is full flow designed SUMP PUMP CHECK VALVE: The sump pump check valve fits both 1-1/4 inch and 1-1/2 inch pipe. Full flow design passes 1 inch solids EASY INSTALLATION: The easy slip fit design makes simple installation and it can be installed in vertical or horizontal line CHECK VALVE CONNECTION: The check valve has a slip x slip connection. This check valve is ABS construction DURABILITY: Durable flapper design checks back flow of water and sewer gases. Flexible union slip over ABS, PVC or copper pipe