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Author Topic: I'm impressed  (Read 16940 times)

slimjim

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Re: I'm impressed
« Reply #30 on: April 08, 2017, 07:10:03 AM »

The recirculate loop up top is a Chinese knockoff Grundfoss supplied by the factory, the 2 zone circus are real Grundfoss 15-58s from my local supply house.
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RSI

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Re: I'm impressed
« Reply #31 on: April 08, 2017, 07:25:54 AM »

I see now why I was confused about the lower pumps. They are rotated flange versions. The normal rotation ones don't have slots.

I can see Grundfos on the label on the top one. How do you tell that it is a knockoff?
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slimjim

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Re: I'm impressed
« Reply #32 on: April 08, 2017, 07:31:37 AM »

The isolation flanges are copper connection and simply turned slightly so all the valves are easy to use and flange bolts are accessible. The easy way to recognize the knock off is the lack of slots on the flange and instead they have a simple hole, I have in the past had to drill the casting in order to get regular flange bolts through the crappy casting job.
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hondaracer2oo4

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Re: I'm impressed
« Reply #33 on: April 08, 2017, 07:33:07 AM »

I like the Ecm fan motor.
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slimjim

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Re: I'm impressed
« Reply #34 on: April 08, 2017, 07:34:15 AM »

Me to, it's very quiet, I also like the cabinet and it's design!
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RSI

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Re: I'm impressed
« Reply #35 on: April 08, 2017, 07:49:03 AM »

The isolation flanges are copper connection and simply turned slightly so all the valves are easy to use and flange bolts are accessible. The easy way to recognize the knock off is the lack of slots on the flange and instead they have a simple hole, I have in the past had to drill the casting in order to get regular flange bolts through the crappy casting job.
That top pump does have slots though.

Real Grundfos 15-58 pumps don't have slots unless they are the rotated flange version like you have in the picture.
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slimjim

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Re: I'm impressed
« Reply #36 on: April 08, 2017, 07:57:42 AM »

You know what, you are correct, that's weird because the one I'm test running here at the shop has the closed holes and not slots, it is also not rotated! Thanks for the correction!
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mlappin

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Re: I'm impressed
« Reply #37 on: April 08, 2017, 11:37:23 AM »

I may start using you’re heater hose technique Slim, that or I just need to invest in new dies for my power threader. Trying to get everything just right with common length pipe nipples is a pain. World of difference though from you’re area to mine, heaving just doesn’t occur here that often. All our grain bins sit on their own monolithic floor/foundations with the fans on their own pours and have never had a transition come apart yet.
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slimjim

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Re: I'm impressed
« Reply #38 on: April 08, 2017, 06:10:29 PM »

All it takes is once and the fittings pulling off the pipe and you will be using a swing joint or heater hose forever!
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mlappin

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Re: I'm impressed
« Reply #39 on: April 08, 2017, 08:47:54 PM »

All it takes is once and the fittings pulling off the pipe and you will be using a swing joint or heater hose forever!

Yah…but a few of these bins are old enough and I remember my Mom showing me them as they were being put up while she was holding my hand, so lets say 44+ years ago and nothing has shifted yet between the bin foundation and the pads the fans sit on.

Heaving happens here of course but of a different kind, what we have here will heave alfalfa out of the ground, but doesn’t seem strong enough to actually effect foundations or slabs. Planting orchard grass with the alfalfa is enough to stop it as the grass roots form enough of a mat to hold the alfalfa roots in the ground.
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DaveB

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Re: I'm impressed
« Reply #40 on: April 08, 2017, 09:10:51 PM »

Thanks for the pics SlimJim..Now I see how the hookups for the two pumps go. Have you had anything to do with Wilo Star S 16F pumps ?
The G2 does look like a nice unit...slick looking trailer you have too !  That sure would make moving those units around a lot easier..
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RSI

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Re: I'm impressed
« Reply #41 on: April 08, 2017, 09:49:09 PM »

Is there a reason you clamp the hose onto copper pipe instead of using hose barb fittings? Seems like that would be a lot quicker and cheaper.
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slimjim

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Re: I'm impressed
« Reply #42 on: April 09, 2017, 04:39:00 AM »

RSI, its quick, cheap, easy, never leaks, easy to adjust length and better flow than using a barbed fitting.
Dave, yes I have but it's been several years, they worked fine but I find it far easier to deal locally for that sort of stuff and getting anything warranties is much simpler.
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DaveB

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Re: I'm impressed
« Reply #43 on: April 10, 2017, 05:10:11 PM »

SliJim
The Wilo Star S 16 pump is from my local supply for OWB, well he is about 5 hours away but as local as I can find. Just wondered if it was a good product or something they might have been trying to get rid of. I assume the 16 is the head rating for the pump. Don't know maybe I should go a little larger ? The OWB will be about 150 feet from the house and about 200 feet from the garage. Then I figure  6 loops of 200 feet in the garage floor, but will have the circulating pump in the garage too..
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RSI

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Re: I'm impressed
« Reply #44 on: April 10, 2017, 05:30:22 PM »

What size underground pipe are you using?
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