Attach the LDH Drain Attachment to the RollNRack unit easily. 

Lift the LDH and lay it over the drain attachment's top roller. 

Feed the coupling though the 'Rack. 

Kick the coupling back with your foot.  

Walk on the LDH as you roll the 'Rack forward on all four wheels. 

Drain all the water out quickly. 

There's no need to stop or pause. 

Slow up at the end and the coupling will clang through. 

The Drain Attachment is meant for long straight lays and will drain residual water from the line. 

Here, one 'Rack is loading and one 'Rack is draining.