need high pressure external pump continuous running capable

Hi all I am growing in 6- 8" PVC tubes 6' long with 40 spray heads, feed tubes are 4 pieces 3/4" 6' long and roughly 2' rise from pump to spray heads (in a loop)

i am looking for someone who may know of a quality external water pump with enough pressure to spay 40 heads that can run continuously?? any help would be greatly appreciated

Also a continuous use pump would be great something that i could start clones with as well as on a timer.

I have tried most all pond pumps but not enough pressure,I bought a little giant submersable pump which works great (except for the heat it generates) but i would like an external

You mean like a pool pump?

Check it out http://www.herpmist.com/pumps.shtml

THANK YOU!!!!!!!!!!! Perfect i appreciate it greatly!!!!!!!