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Pump recomendations for pumping water from a pond with (20ft of head)

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Hello all!  Thank you in advance for you help.

Two years ago I purchased a SHURflo diaphragm pump (model # 2088-474-144) to pump water out of my pond and up 30 vertical feet to a tote from which I gravity feed my 3-acre forest garden. When the pump arrived with a plastic guard broken, the company sent another free pump.  We set up the pump to run on an altE 110W solar panel, a a water filter attachment, and a linear current booster, and ran the pump only when it was very sunny and not very often in general (about one day out of every two weeks in the summer).  

The system appeared to work perfectly, but after about a year the first pump failed without any clear explanation and a year later, the second pump (we were able to use the pump with the broken plastic guard, after all) stopped working as well.  We have gone through all of the troubleshooting recommendations - in the case of the second pump, each of the troubleshooting efforts would make it run only a short while before it stopped running again. It seems ridiculous to go through one water pump per year, so I would love to hear people's recommendations for durable, high-functioning water pumps.  I am happy to spend more money on a pump if it will last for longer and be of a quality that allows me to reliably repair it or have it repaired.

My initial research into water pumps made it seem that diaphragm pumps would work best for this type of low intensity pumping, but I think now that centrifugal pumps might make more sense given that they have fewer moving parts.

I very much look forward to hearing people's thoughts.  Thank you!

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Posts: 210
Location: North central Ontario
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The shurflo is a good pump but that extremely efficient watts per gallon pumped rating comes at a price; they wear out. Add in the linear actuator and they wear out faster. The dankoff 24 volt pump is a much better long lasting beast but it's pricey https://www.altestore.com/store/solar-water-pumps/surface-solar-pumps/solar-slowpump/dankoff-slowpump-1322-24-24vdc-surface-pump-p452/
I have seen old school off grid setups with them well over 20 years old and running fine. You could go the jet pump route instead but expect to use 2 to 3 times the power to pump the same amount of water. More if you go ac and the linear actuator wont help. I like piston pumps myself but they are crazy expensive new and require maintenance but mine are over 50 years old.
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Cheers David
Posts: 639
Location: In the woods, West Coast USA
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I have had the absolute best performance and endurance from a pump that is made by a company that also makes cars.  I have no association with this company.  It was able to pump about 20 feet of head across 300 feet to the top of a ridge, in a 1 1/2" line, and then the line went down the ridge.  It tied into my drip system without putting too much pressure on it.   As the pond lowered during the summer and the head increased to about 30 feet, it didn't even falter.  It's by far the best pump I've ever used.  It uses way less gas than the cheaper pumps, which makes it even more valuable.  It runs longer on the same amount of gas, so it saves a lot of my time.   I've had it for 7 years and use it approx. 100 hours a year, and keep it inside a wooden shed where it is completely protected the rest of the time.

I have a lot of acreage in a mountainous area to maintain, and have gone through 2 other pumps before buying one of these.  I have swallowed a bit in paying more, but I paid for it once already in buying two of the others.  I spent more time trying to figure out why the crummy pumps wouldn't work, walking back and forth dozens of times, fussing with the line, fussing with the angle, until it drove me crazy.  It wasn't my fault or too-long line, it was a pump that worked at first, then slowly stopped being able to do the job.

And if it's okay to go on, I buy from this company for every kind of equipment I need if they have it.  I have never regretted it.  The equipment is reliable, dependable, and I don't feel exhausted at the end of the day.  And when I need stuff to start up, it does, without a struggle, without having to fuss with it and figure out its idiosyncrasies.  Yeah, they cost more, but they last longer, which means they really don't cost more.
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Location: Michigan
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The dankoff (flo-lite) pumps are hard to beat for efficiency. Dc drive (available ac too) and positive dispacement get the job done with minimum wattages and high reliability of water delivery. Piston and centrifugal pumps for larger delivery.

If you are 30 feet above the source, a pump that can do that head (60+ psi) comfortably ( with room to work, or head room) will be more efficient and last longer.
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