Helping me select a new well pump
#1
05-07-18, 12:43 AM
Helping me select a new well pump
Current well set up is
78 feet well, 100GPM capacity
60 feet 2" schedule 80 PVC drop pipe
pump is set at 60 feet
6" well casing
stainless screen pipe set at 73-78 feet
Pressure is set to 70PSI
I currently have a 2HP well pump and it's just not big enough.
The current set up i have is
BF20 Variable speed controller
2HP 3 phase motor
Goulds 33GPM pump
I am currently buying all the stuff I need to go to a 3HP well pump:
I currently have bought the new 3HP 3AS30 controller
The motor I need will be a 3Phase Goulds motor.
I need help selecting the best 3HP well pump I can. But it seems like I need a few bits of information before I can select the correct pump.
What other Information do i need before determining what pump I should use.
Do i just need the static water level, or do I need to figure out static and draw down water level?
Here's the chart I am looking out at picking out a new pump
https://www.lockewell.com/pdf/goulds/GS-33-80.pdf
Can anyone help me figure out the current GPM I am actually getting with 70PSI using the 33GS20. Then would you be able to help me figure out the GPM I would get using the 55GS30.
The chart shows "Depth to water" do they consider "Depth to water" static?
The missing piece I need is just static water level, or static plus drawn down?
78 feet well, 100GPM capacity
60 feet 2" schedule 80 PVC drop pipe
pump is set at 60 feet
6" well casing
stainless screen pipe set at 73-78 feet
Pressure is set to 70PSI
I currently have a 2HP well pump and it's just not big enough.
The current set up i have is
BF20 Variable speed controller
2HP 3 phase motor
Goulds 33GPM pump
I am currently buying all the stuff I need to go to a 3HP well pump:
I currently have bought the new 3HP 3AS30 controller
The motor I need will be a 3Phase Goulds motor.
I need help selecting the best 3HP well pump I can. But it seems like I need a few bits of information before I can select the correct pump.
What other Information do i need before determining what pump I should use.
Do i just need the static water level, or do I need to figure out static and draw down water level?
Here's the chart I am looking out at picking out a new pump
https://www.lockewell.com/pdf/goulds/GS-33-80.pdf
Can anyone help me figure out the current GPM I am actually getting with 70PSI using the 33GS20. Then would you be able to help me figure out the GPM I would get using the 55GS30.
The chart shows "Depth to water" do they consider "Depth to water" static?
The missing piece I need is just static water level, or static plus drawn down?
#2
05-07-18, 05:08 AM
Group Moderator
A 2 hp pump at 60 feet isn't providing enough water??? How much water do you need?
One thing you should notice for all models of pump in your .pdf is that 60 psi is listed as the maximum pressure. Most residential well water systems work closer to 40 psi. Instead of going to a monster sized pump and pushing it past it's limit to get 70 psi you could consider a standard sized well pump to get the water out of the ground then use a separate booster pump to get up to the pressure you want.
One thing you should notice for all models of pump in your .pdf is that 60 psi is listed as the maximum pressure. Most residential well water systems work closer to 40 psi. Instead of going to a monster sized pump and pushing it past it's limit to get 70 psi you could consider a standard sized well pump to get the water out of the ground then use a separate booster pump to get up to the pressure you want.
#3
05-07-18, 01:47 PM
2 acres of landscaping
geothermal
fire sprinklers
5 bathrooms
The master bath tub uses a 10GPM alone when its on.
The 2HP pump just isn't enough when the geothermal is on and my sprinklers are on. I have already reduced the water pressure from 78 to 70 PSI. I can't lower the pressure anyone or the master tub bath steam won't hit in the bath tub.
I have a Variable speed system. I know going to a 3HP pump is going to up my electricity cost to 3$ per 12 hours instead of 2$ per 12 hours.
But when my sprinker zones turn on. they're asking for such an instant demand that the 2HP well pump drops the pressure inside my home to accommodate the sprinklers. Causing an unequal pressure inside my home and in my sprinklers. My bladder tank will drop pressure and in a few seconds pumps all the pressure back up causing the tank to bladder to slam inside the tank, causing a huge water hammer inside my home.
I have had someone else ask me about the booster pump as well. I am not against doing that. However I don't have much room to work with. I just had abunch of plumbing work done. My geothermal was accidentally hooked up to my water softener. So i had it all replumbed. Where my incoming water is. I just have NO room to add in a booster pump.
Here's a few photos
geothermal
fire sprinklers
5 bathrooms
The master bath tub uses a 10GPM alone when its on.
The 2HP pump just isn't enough when the geothermal is on and my sprinklers are on. I have already reduced the water pressure from 78 to 70 PSI. I can't lower the pressure anyone or the master tub bath steam won't hit in the bath tub.
I have a Variable speed system. I know going to a 3HP pump is going to up my electricity cost to 3$ per 12 hours instead of 2$ per 12 hours.
But when my sprinker zones turn on. they're asking for such an instant demand that the 2HP well pump drops the pressure inside my home to accommodate the sprinklers. Causing an unequal pressure inside my home and in my sprinklers. My bladder tank will drop pressure and in a few seconds pumps all the pressure back up causing the tank to bladder to slam inside the tank, causing a huge water hammer inside my home.
I have had someone else ask me about the booster pump as well. I am not against doing that. However I don't have much room to work with. I just had abunch of plumbing work done. My geothermal was accidentally hooked up to my water softener. So i had it all replumbed. Where my incoming water is. I just have NO room to add in a booster pump.
Here's a few photos
#4
05-07-18, 02:19 PM
Group Moderator
If the bladder inside your pressure tank is slamming then you need to check the air pressure.
I hope that little thing in your photo isn't your pressure tank. Do you have a full sized tank for your water system somewhere out of the photo?
Since you included a photo of your piping... what size is the tubing?
One big thing you can do is stagger your usage. Program the irrigation so it comes on in the middle of the night. That way you don't need to size your system to supply irrigation, geothermal and filling a monster tub simultaneously.
I hope that little thing in your photo isn't your pressure tank. Do you have a full sized tank for your water system somewhere out of the photo?
Since you included a photo of your piping... what size is the tubing?
One big thing you can do is stagger your usage. Program the irrigation so it comes on in the middle of the night. That way you don't need to size your system to supply irrigation, geothermal and filling a monster tub simultaneously.
#5
05-07-18, 02:46 PM
Air pressure is correct, 20PSI below turn on pressure as indicated by Goulds. The air bladder is also the correct size, as this is a VFD system and not a CSV. Piping inside the house is 1.5".
I also thought about staggering the use, so everything isn't on at once. But the problem is, I have 17 zones. Each zone is usually on for an hour. Which that means it runs ALL day.
I have a ESP LXME controller. I also tried to see if I can run half the zones one day, and the other half of the zones another day. I haven't figured out if i can do that or not.
I have 6+ Rainbird 5004s on, which all use 3GPM each. I also thought about replacing the nozzles inside them to 2GPM, so that would save me 6GPM just on one zone. I also thought about putting one of these in https://www.supplyhouse.com/Zurn-112...ciple-Assembly.
I don't know if that reduces the incoming pressure much thought, I have the same one but without the pressure reducing in it.
But i also have these all in my zones PRF075RBY - 3/4 in. Pressure-Regulating Filter (RBY) ( does anyone know if these actually work)
I also have the PESB150 that are monsters that I have turned all the way down.
I'm also worried if my sprinklers are on and I have a fire, i don't think that 2HP well pump will do much.
I also thought about staggering the use, so everything isn't on at once. But the problem is, I have 17 zones. Each zone is usually on for an hour. Which that means it runs ALL day.
I have a ESP LXME controller. I also tried to see if I can run half the zones one day, and the other half of the zones another day. I haven't figured out if i can do that or not.
I have 6+ Rainbird 5004s on, which all use 3GPM each. I also thought about replacing the nozzles inside them to 2GPM, so that would save me 6GPM just on one zone. I also thought about putting one of these in https://www.supplyhouse.com/Zurn-112...ciple-Assembly.
I don't know if that reduces the incoming pressure much thought, I have the same one but without the pressure reducing in it.
But i also have these all in my zones PRF075RBY - 3/4 in. Pressure-Regulating Filter (RBY) ( does anyone know if these actually work)
I also have the PESB150 that are monsters that I have turned all the way down.
I'm also worried if my sprinklers are on and I have a fire, i don't think that 2HP well pump will do much.
#6
05-08-18, 08:27 AM
Group Moderator
If using this pump for a fire suppression system you need to insure that everything else it turned off when the sprinklers activate. Currently I doubt your sprinklers will be much good as they can flow a considerable amount of water.
What size is the piping in your photo?
What size is the piping in your photo?
