Mounting the Pipe is Simple.   The nipple on the back of the riser is formed to provide a slip-fit for the designated pipe diameter.    

Slide the pipe over the nipple and position the supplied cleat on the side as shown.    Using a powered screwdriver or drill with a 5/16 socket, drive the supplied self-drilling screws through the pipe and into the nipple as shown in the video.    We recommend starting with the center two screws then the outer screws.    Repeat on the opposite side using the second cleat.  

These cleats provide a robust connection that will not easily rip out or tear the pipe.    The cleats can optionally be mounted by bolts extended from the inside of the nipple if you prefer not to have the points of the self-drilling screws extending into the pipe.  Simple drill holes and place bolts from the inside and fasten the cleats with nuts.  

The bell-end of the pipe will be very loose on the nipple.  Simply cut the bell off just before the first rib  for a nice fit.   

Sealing Large Diameter HDPE Pipe Connections

Our in-line units are provided with sealed couplings.  Even with properly sized couplings, achieving a truly watertight seal is difficult with corrugated pipe couplings.   The seal is not critical on the outlet side because the coupling is not under pressure.   Leaking can be a problem on the inlet side of an in-line structure if the seal is not watertight. The problem is magnified on taller structures with more head pressure.  An optional step involves applying an adhesive between the pipe and the inlet sleeve on our in-line unit.   Few adhesives adhere well to polyethylene.   We recommend a liberal coating of Dupont (formally Dow) U-418HV, U-428HV or U-438HV urethane  adhesive on the inlet sleeve prior to final installation of the pipe.  These single-part adhesives cure into a tough but pliable urethane rubber.   The glue does not truly bond to the HDPE pipe but it makes a great form-fitted gasket.   Use caution because these adhesives are tenacious and are hazardous.  They make a mess of everything they inadvertently touch.   They do not wash off.  Wear disposable gloves and protective clothing. Follow the manufacturer’s instructions and wear the appropriate PPE.