Posted by carneyke on May 19, 2006, 10:55 am
Do a search on EL Sid pumps. Not sure if it will do the 4 meters, but
it may be worth contacting the supplier. I put one in my DHW system and
it works fine, cost around $ 220 US (ouch !). Take Care, Kevin
Posted by Mike on May 21, 2006, 11:11 pm
EL Sid pumps are only suitable for lower heads up to 2 metres, would have to
put several in series to get sufficient flow @ 4M head, this makes it too
Posted by Jeff on May 19, 2006, 4:43 pm
Why don't you post this over in alt.solar.photovoltaic, might get a
quicker answer there.
You are off the mains?
Put two in series to boost the head. Works with fans, front to back. In
your case I don't know whether front to back, or the second half way up.
Sounds like you are almost all solar. I'm terribly impressed!
Posted by Mike on May 21, 2006, 11:25 pm
Yes am off the mains supply, not cost effective to move to 100% PV, but
solar heating and hot water are things that can be built DIY, making it very
cost effective for anyone who wants to have a go. There is plenty of reading
material available and groups like this are great for getting ideas and
Series pumps work, but starts getting expensive. I have a solar heating
application that requires pumping to a 4m head at 15 litres a minute, so far
cannot locate a suitable DC pump, may have to go to an AC pump running off
Posted by Jeff on May 22, 2006, 1:26 am
I've never lived more than a mile from a freeway or a less than 100
feet from a neighbor. But it seems to a city boy like myself that solar
is the way to go. Why use a resource you don't need?
There is plenty of reading
I was looking at one earlier today at a home improvement store here (in
the states) that looks like it would do that (20 foot head), About $5
US. What's the downside of using an AC pump with an inverter?
Also, I believe that with drainback that once you fill the pipe and
complete the loop that the head drops to near zero (I believe I read
that in this group, you would have to verify). Seems to me that you
could use the pump with the inverter to start and switch to a lower
draw, smaller pump to circulate. You might get too much flow with the
high head pump.
I imagine that electrity is a precious commodity for you, I have Amish
friends and they say electrity is very expensive because theirs comes
from AAA batteries! (All Amish seem to have a one cell LED flashlight in
Haven't found mini corrugated aluminum yet... Thanks for all the tips.