We typically use 3/8" nylon as a transfer tube from our pumps to the mist line. The high pressure nylon tubing is durable and can be direct buried. The wall thickness is .090 inches and normal operating pressure is 1000 psi. Measured burst pressure is 2000 psi at 75 degrees F.

 

                       BLACK TUBING                                                    BROWN TUBING

3/8" O.D. Nylon Tubing 25 FT Roll Black                                    3/8" O.D. Nylon Tubing 25 FT Roll