another couple of suggestions for you tony,

not sure about where you are but maybe a spear pump installed could
alleviate your problems see the following link:

http://www.spearpumps.8m.com/

he could possibly at least advise, i talk to this chap on gardening
forums his name is paul. or maybe even a bore if you are not suitable
for a spear pump, can't suggest any body about bores, just look in the
yellow pages.

if you do ring paul just tell him gardenlen sent you he may buy me a 6
pack sometime but apart from that there is no affiliation.

a 5,000 gallon inground water tank with an on demand electric pump
would also be another option.

have fun we are

len

snipped
--
happy gardening
'it works for me it could work for you,'

"in the end ya' gotta do what ya' gotta do" but consider others and the environment
http://home.dnet.aunz.com/gardnlen/