Mounting external pumps upside down?

[beaker020]

here is a pic of one. they come in white too. Home depot carry these and ball valves too, along with just about any hardware/building supply store.




These are the ultimate but are rather expensive and much harder to find. Also, if you do go with these watch out. Many of this style cannot be opened under pressure, the ball pops out. Which makes them completely useless for our application.