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Thanks Peter!! That IS an attractive price! I'm curious how it will hold up. I guess my only concern would be the fact it is constructed of cast iron. Do you think that choice of material is suitable for Puna? I wonder if they offer a stainless steel model?
quote:
Originally posted by Peter Epperson
I build water tanks and have installed many pumps. I feel that the Grundfos is overrated and over priced. I just installed one of these at home https://www.amazon.com/Red-Lion-RJS-75-PREM-602207-Premium/dp/B00XX7C8RK/ref=sr_1_1?s=hi&ie=UTF8&qid=1479663565&sr=1-1&keywords=red+lion+rjs+75 Admittedly, I've only had it up and running for a week, but it appears to be very well built and I can't find anything to complain about it.
$239 with free shipping is hard to beat!
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Selecting a pump is quite dependent on the situation. You need to look at how much water in terms of gpm you might need at most combined with the amount of lift in feet. There's data out there on the net regarding this stuff. My needs are fairly limited, with the tank being at or above the level of most fixtures and being a studio cottage, there won't be a lot of simultaneous demand, so even a 1/2 hp pump is probably overkill. You can save your pump life span a fair bit by making sure you have a good pressure tank, keep the pump cut of settings set to match that pressure tank and monitoring your pressure tank over time to ensure it doesn't fail. Lessons you learn the hard way, lol! I'm not sure it matters all that much what brand you get. Check online reviews for anything you are considering and get one with some decent feedback.
Me ka ha`aha`a,
Mike
Me ka ha`aha`a,
Mike
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The Grundfoses I've dealt with have their own tiny internal pressure tanks just to deal with slight pressure variations during off times and go on every time you turn on a faucet. They aren't designed to use external pressure tanks (but maybe other GFs are). They're also quite noisy. They also don't last too long, four or five years. I've never understood the appeal. As far as I know the only reason they've made inroads in the market here is that Waterworks became a dealer and pushed them.
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On top of all that, they're premium priced, probably because they claim that the pump does the job of pump + pressure tank as well as other setups. They don't, IMO.
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I'm off grid and I went with a 48 volt Dankoff pump with a large pressure tank. It works great.
Use a 2-hp jet pump with a cast iron body and the biggest pressure tank that you can personally drag around.
Also, half inch plumbing inside the house is fine, unless you really need a fire hydrant at the kitchen sink.
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You can't fix Samsara.
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We had a grundfos pump on the mainland for over 15 years. Ran like a champ and as far as I know it's still going strong. Personally I liked not having a pressure tank and that it ran off 110. Yes it will run any time a tap opens and as for noise it was in an insulated crawl space so it didn't bother us. Am looking at converting my current system here to a similar setup but far from the main house cuz of the noise. Our current flojet pump works well except for the light dimming startups. I hate the up and down pressure of pressure tanks and liked the constant set pressure of the grundfos. Imho. The only thing that concerns me is that oftentimes what works well one place doesn't necessarily do so in another. Hence reading these forums and listening still the best bet!
Remember...Aloha!
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quote:
Originally posted by pandp
We had a grundfos pump on the mainland for over 15 years. Ran like a champ and as far as I know it's still going strong. Personally I liked not having a pressure tank and that it ran off 110. Yes it will run any time a tap opens and as for noise it was in an insulated crawl space so it didn't bother us. Am looking at converting my current system here to a similar setup but far from the main house cuz of the noise. Our current flojet pump works well except for the light dimming startups. I hate the up and down pressure of pressure tanks and liked the constant set pressure of the grundfos. Imho. The only thing that concerns me is that oftentimes what works well one place doesn't necessarily do so in another. Hence reading these forums and listening still the best bet!
Possible pressure tank solution would be to use a large pressure tank and bump up the cut-in pressure to something like 50psi in 60psi off. Then the pump won't be going ALL THE TIME, yet your pressure will be fairly constant.
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I have a 42 gallon pressure tank and a switch set at 40 psi on and 60 psi off. I don't notice any pressure fluctuations.
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With our standard setup we only notice the pressure fluctuations if the filters are dirty or the pressure tank needs air added.
