Deep well jet pump upgrade.

[Mebunkeryou]

Hi
Tl;dr
I'm wondering if upgrading my deep well convertable pump to a larger pump will give me higher GPM?

I currently have a simer 3/4 HP jet pump with 1 1/4" and 1" inputs. It puts out about 5 gpm at 50 psi. It's is wired for 230v and works just fine but I'd like more GPM. The well was drilled in 1981 and there is no record of depth, however most new wells in my area are roughly 180'. I've ran the pump for 27 hrs while filling a skating rink so I think the well itself is sound and won't dry up. I've been looking at the gould J series pump which on paper are far superior than my current pump. Would upgrading to a J10 or bigger increase my flow? Even if I could get 10 GPM it would be a significant difference. Thanks for reading.

 

[Valveman]

The 3/4 Simmer will do 5 GPM at 50 PSI from 25' deep. The J10S will about 10 GPM. But it can only do 10 GPM if the well will make 10 GPM. Running the 3/4 wide open and at low pressure should simulate the 10 GPM flow. If this is the way you fill the skating rink for 27 hours, then the well will make enough for 10 GPM, which will require the 1HP for the 50 PSI needed. So, sounds do-able. Remember when you double the flow rate the pump will cycle on and off more and more rapidly. Adding a Cycle Stop Valve will let you install as large a pump as you need, and still keep it from cycling when using it like a small pump.

 

[Sponsor]

 

[Valveman]

Or is this a deep well jet like the title says? I see you said J10 not J10S, so deep well with two pipes down the well? Should be about the same specs as I mentioned above.

 

[Mebunkeryou]

The 3/4 Simmer will do 5 GPM at 50 PSI from 25' deep. The J10S will about 10 GPM. But it can only do 10 GPM if the well will make 10 GPM. Running the 3/4 wide open and at low pressure should simulate the 10 GPM flow. If this is the way you fill the skating rink for 27 hours, then the well will make enough for 10 GPM, which will require the 1HP for the 50 PSI needed. So, sounds do-able. Remember when you double the flow rate the pump will cycle on and off more and more rapidly. Adding a Cycle Stop Valve will let you install as large a pump as you need, and still keep it from cycling when using it like a small pump.

View attachment 100754

Thanks. Never heard of a cycle stop valve until ending up here and sounds like a great addition. Any other pumps you'd recommend besides the J10?

 

[Mebunkeryou]

Or is this a deep well jet like the title says?

View attachment 100755

Yes deep well jet with 1-1/4" suction and 1" pusher?

 

[Valveman]

Thanks. Never heard of a cycle stop valve until ending up here and sounds like a great addition. Any other pumps you'd recommend besides the J10?

Not much difference in pump quality these days. Just search for a 1hp jet pump and ejector.

 

[Reach4]

Hi
Tl;dr
I'm wondering if upgrading my deep well convertable pump to a larger pump will give me higher GPM?

I currently have a simer 3/4 HP jet pump with 1 1/4" and 1" inputs. It puts out about 5 gpm at 50 psi. It's is wired for 230v and works just fine but I'd like more GPM. The well was drilled in 1981 and there is no record of depth, however most new wells in my area are roughly 180'. I've ran the pump for 27 hrs while filling a skating rink so I think the well itself is sound and won't dry up. I've been looking at the gould J series pump which on paper are far superior than my current pump. Would upgrading to a J10 or bigger increase my flow? Even if I could get 10 GPM it would be a significant difference. Thanks for reading.

Confirm that your well casing is smaller than 3.5 inches OD. If your well casing is 4.5 inches OD, we will suggest a submersible pump. There are a lot of advantages if you can do that.

 

[Mebunkeryou]

Confirm that your well casing is smaller than 3.5 inches OD. If your well casing is 4.5 inches OD, we will suggest a submersible pump. There are a lot of advantages if you can do that.

Had a guy come out this week. Said upgrading jet pump wouldn't make a difference. And it's a 50/50 shot of the submersible working....

 

[Reach4]

Had a guy come out this week. Said upgrading jet pump wouldn't make a difference. And it's a 50/50 shot of the submersible working....

Did he cite what factors would cause the submersible pump to not work or work? Examples might be well ID (inside diameter), depth of well below water level.

 

[Valveman]

Had a guy come out this week. Said upgrading jet pump wouldn't make a difference. And it's a 50/50 shot of the submersible working....

Well I disagree. Going with a larger pump will give you more GPM at pressure. You will also have to change the ejector at the bottom of the well to match the pump. But just look at the pump specs and you can see a larger pump puts out more water.

 

[Mebunkeryou]

Did he cite what factors would cause the submersible pump to not work or work? Examples might be well ID (inside diameter), depth of well below water level.

Yes ID and if the well could supply more than 5 gpm itself.

 

[Mebunkeryou]

Well I disagree. Going with a larger pump will give you more GPM at pressure. You will also have to change the ejector at the bottom of the well to match the pump. But just look at the pump specs and you can see a larger pump puts out more water.

That's kind of what I thought from looking at the specs. Why is it necessary to change the ejector? If I were to expose the well, I might as well go submersible right?

 

[Valveman]

That's kind of what I thought from looking at the specs. Why is it necessary to change the ejector? If I were to expose the well, I might as well go submersible right?

The ejector needs to match the pump. Yes, if the casing is 4" or larger a submersible is best.

 

[Reach4]

Yes ID and if the well could supply more than 5 gpm itself.

ID is a critical factor, with a minimum of 3 inch PVC ID, or bigger with some other construction.

With two inch steel pipe, submersible is not something that you could consider.

What volume the well produces would not be a significant factor in choosing between a deep jet pump and a submersible pump IMO.

 

[Mebunkeryou]

The ejector needs to match the pump. Yes, if the casing is 4" or larger a submersible is best.

So according to specs on my current pump, I can assume my well is 40-50 ft deep? A 3/4 hp convertable Myers says it can pull 10.5-12 gpm at that depth. If both are 3/4 HP is it still necessary to change ejector? And if I didn't, would I still just get the same GPM?

 

[Valveman]

Same hp will probably have same ejector but ejector could be bad.