Here is my house lot layout

[bigbuck1975]

I took the time to draw this up so you guys could see.
As I stated before, I can get 11 gpm at 30 psi residual at the end of 300 feet of 5/8" garden hose (50 psi static). Is this do-able with my pressure and flow or will I need tons of zones? I have a design being worked on but wanted to know.

[Wet_Boots]

Screw the hose-end measurements. Go back and get real numbers.

[hoskm01]

Screw the hose-end measurements. Go back and get real numbers.
Especially after 300 feet. The spigot is inaccurate enough.

[FIMCO-MEISTER]

If you coiled up 300' of hose you would have a hundred yards.

[hoskm01]

If you coiled up 300' of hose you would have a hundred yards.
wouldn't it still be 100 yards stretched out?

[FIMCO-MEISTER]

wouldn't it still be 100 yards stretched out?

Maybe........We could get a 200 dollar measuring wheel from forestry Supply and check.

[bigbuck1975]

Went home and check the pressure and flow directly from the faucet, got 17 gpm with 21 psi residual.

[Wet_Boots]

Still not all that useful. If the pump output pressure is 35 psi, what is the flow?

[bigbuck1975]

Here is the breakdown of my well point:

The point is installed in the ground and contains a jet pump with hydropneumatic tank that shuts off when pressure is built upto 50 psi.

When the sprinkler heads will run, the pump will run continuously.

With pump running and 40 psi residual pressure in the system, output will be approximately 6 GPM

With pump running and 30 psi residual pressure in the system, output will be approximately 11 GPM

With pump running and 21 psi residual pressure in the system, output will be approximately 17 GPM

My point is solely dedicated to this watering system and will not require a BFP.

Water is available and there is no issue with dewatering the point.

I am not sure what else I could provide for info, what else is necessary?

[AI Inc]

design the system around 6 gpm.

[bigbuck1975]

Thank you sir, I was thinking about maybe shooting for 10 gpm but was curious to the norm when it came to this. What would be the disadvantage to 10 gpm? Functionallity of sprays, etc? I was thinkg maybe 6 would be good for rotor zones and I could squeek out 10 on the pop up zones, I am just looking for some solid advice.

Thanks again.

[Wet_Boots]

If any of that pressure data was measured downstream of a hose or faucet, it isn't very useful. You have a pressure gauge on the pump itself, if you want reliable numbers.

[hamham]

Do you know:

-the make/model of pump
-depth of the well
-size of pipe from pump to top of well

[Kiril]

design the system around 6 gpm.

or 8 gpm .... 10 gpm is too close to the acceptable pressure edge for my comfort. Now if you can push 10 gpm at 40 PSI, no problem.

One other thing, dedicated well point or not, you should have back flow protection.

[Mike Leary]

I am just looking for some solid advice.

Wrong forum without more information.

[bigbuck1975]

Pressure readings were taken at the pump, flow was recorded at the outside discharge point of my pump which is about 6' above pump. Pump is a myers 1/2 HP model, I think it is model HJ50s, I will need to check once home. Pump is mounted on the floor of basement, suction line is 1 1/2" galvanized, discharge is 3/4" galvanized which I will be upgrading to 1" to gain a little more.

[EagleLandscape]

Use MP Rotators

[bcg]

My point is solely dedicated to this watering system and will not require a BFP.



You do still need BFP even though you're only using the well for watering. It's not getting water from an isolated underground pool and even if you aren't drinking that water, someone is. It isn't expensive enough to do it right to make it worth doing it wrong.

[hamham]

Pressure readings were taken at the pump, flow was recorded at the outside discharge point of my pump which is about 6' above pump. Pump is a myers 1/2 HP model, I think it is model HJ50s, I will need to check once home. Pump is mounted on the floor of basement, suction line is 1 1/2" galvanized, discharge is 3/4" galvanized which I will be upgrading to 1" to gain a little more.

Now we need to know how deep your well is.

This is your pump curve. From the looks of the curve, hopefully your well is very shallow.

[Wet_Boots]

I've used a Myers HJ50S before, and you should keep 10 gpm as a top figure for flow. To provide the kind of pressure that, say, a PGP #7 nozzle would use, that top would drop to more like 7 gpm.

[bigbuck1975]

Maybe the smart thing to do is to upgrade to the 3/4 HP pump, what do you guys think? If I am upgrading, would it be better to just go with the 1 HP? My buddy is a myers rep and I can get the pumps at a pretty good deal. Seems like I am running the ragged edge with this pump.

[hamham]

Maybe the smart thing to do is to upgrade to the 3/4 HP pump, what do you guys think? If I am upgrading, would it be better to just go with the 1 HP? My buddy is a myers rep and I can get the pumps at a pretty good deal. Seems like I am running the ragged edge with this pump.

I don't know, I can't get the part of your post where you mention the well depth to download.

[Wet_Boots]

Did we lose the post where the size of the lawn was mentioned?

[bigbuck1975]

Depth to water is approximately 2' deeper than basement floor which would put it 6 to 7 feet below grade. The first post of this thread contains a PDF that shows the lot drawn to scale. Scale is 1" = 20'.

[Wet_Boots]

How about you just type the words that indicate the amount of area being watered. You want answers, you do the work. I avoid pdf files when I can.

[hamham]

Depth to water is approximately 2' deeper than basement floor which would put it 6 to 7 feet below grade. The first post of this thread contains a PDF that shows the lot drawn to scale. Scale is 1" = 20'.

Your pump can do 10 gpm at 40 psi discharge or 5.5 gpm at 50 psi discharge.

Now, what is the elevation difference between your pump discharge and where the highest sprinkler head will be?

Once you answer this and WB's question, we/you can figure out how long you'll have to run your system to water your entire lawn.

[Kiril]

How about you just type the words that indicate the amount of area being watered. You want answers, you do the work. I avoid pdf files when I can.

:cry::cry:

You didn't even try to find it. Do you have anything better to do? Took me all of 20 secs to pull this.

Strips adjacent to the street are 120' X 14' and 50' X 10'. Yard areas are not too big, nothing with greater than 35' in any dimension in front (25X25, 35X35, and 24x40) and about 50X40 in back. Side of lot contains another 120x8strip.

I was thinking maybe 2 zones with strip areas adjacent to street, 1 zone with side lot strip, 1 zone with 25X25 and 35X35, and a zone with the back and a zone with the 24X40. I am awaiting receiving my layout and will set up based on that.

Initially I had done a fair amount of research and though maybe the Hunter I-20 rotors, and rainbird 1800's. I was going to probably spend a few bucks more on valves and go with rainbird PEB's and had no idea on controllers. I wanted to get some opinions.

[Wet_Boots]

Hey, my eyes are crusted over, and posts disappear from this website faster than cashews from the bowl on the coffee table. If the OP doesn't know, within 100 sq ft, the area being watered, then send him some literature for Lawn Belt.

[bigbuck1975]

After actual measuring and drawing here are dimensions:

Side Strip 1 - 14 x 140 (drawing incorrect)
Side Strip 2 - 10 X 140
Front Strips (3) - 10 X 10, 50 X 10, 14 X 10
Front Section 1 - 24 X 24, approx
Front Section 2 - 30 X 40, approx
Front shrub sections 6X18, 2 30' strips with 7 bushes each
Side Yard - 26 X 40 approx
Back Yard Section 1 - 46X48
Back Yard Section 2 - 20X40 in which 10X10 is a flower section

Elevation change on property is less than 6". Height to top of sprinkler from pump no more than 8' I would guess.

Thanks guys for all your help

[Wet_Boots]

One reason to stick with a half-horse pump is its power usage, which is very unlikely to ever trip a 15-amp branch circuit. Some job sites only provide 120 volts on a 15-amp circuit, so the design will follow from there.

[bigbuck1975]

IF the 3/4 hp pump would provide that much better performance, I could make it work by upgrading the breaker in the panel to a 20 amp or provide a dedicated 20 amp in the panel just for the pump (I do have a spare circuit available.

Talking power usage, were not that much different with a 1/2 vs 3/4, couple bucks a month or so.

If I can get away with the 1/2 HP I would prefer too, but if it becomes more of a pain in the a$$ to deal with, I will upgrade. What do you guys think?

[Kiril]

One reason to stick with a half-horse pump is its power usage, which is very unlikely to ever trip a 15-amp branch circuit. Some job sites only provide 120 volts on a 15-amp circuit, so the design will follow from there.

If that is your advice, then why did you need lawn dimensions? :hammerhead:

[Wet_Boots]

With spray heads, you can probably get a reliable 10 gpm to work with from the HJ50

[Kiril]

If I can get away with the 1/2 HP I would prefer too, but if it becomes more of a pain in the a$$ to deal with, I will upgrade. What do you guys think?

You need to pick a size that will run just to the right of the peak efficiency point on the pumps performance curve the majority of the time the system is in use.

The first thing you need to do is determine your hydrozones. From there, you can figure what your max flow requirements will be.

[hamham]

Your pump should have a static pressure of 65 psi at the discharge. In your first post you said you actually measured 50 psi at about 8' higher than the pump. I would double check your pressure measurement and make/model on the pump. If your pump isn't doing 65 psi static, you won't get the flows listed on the curve and your pump may need to be overhauled.

[Wet_Boots]

At any rate, it is the right sort of pump to work with, it being a jet pump.

[bigbuck1975]

I have a hydropneumatic pump with a pressure switch that shuts off at 50 psi, the pump will make more pressure than that without the switch I would assume, for outside application with hoses, I can leave the pump on and it shuts off at 50 psi, easier on the pump in the long run I believe. I don't think there are any issues with the pump