1)Connect md 40 to a pipe that leads to the sump
2)Connect another tubing to the md40 outlet and give it a LOVE KISS... (suck it)
srry, bit vulgar.
3)Now the MD40 will be filled with H2O then..connect the tubing to the BECKETT..
then fire up..
4) Observe if there any bubbles, if no... repeat step 2-3.
if still cannot...give me a call then