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My static pressure at the closest hose bib to my meter (in house) is 50 psi. Using the toro psi/gpm manifold set, i only get 3.4 - 4 gpm at 35 psi witch i know is low. My home supply after the meter is 3/4" copper, and the hose bib outside i know is 1/2". Is there a formula or table to tell me what my gpm would be off of 3/4" or is there a big difference?!? Can I turn up my water regulator (max setting of 80 psi) to get a better working pressure or gpm?!?

Also, is it better to run 1" poly after the valves, or should i keep it 3/4"?!?

Please Help.. Thanks.

Also, is it better to run 1" poly after the valves, or should i keep it 3/4"?!?

Please Help.. Thanks.

I think this is going to be close. Take the diameter of your pipe hose bib and use that to calculate the area of the pipe. Pie* radius squared= area of a circle. so .5*.5*3.14=.785 then do the same for your house main .75*.75*3.14=1.76 because the flow is directly related to the size of the pipe we take thes 2 numbers and divide 1.76/.785= 2.25 This says a 3/4 inch pipe will allow 2.25 more flow than a half inch pipe. Now take 3.4 *2.25=7.65 gpm. I used the 3.4 number to esimate conservatively.

Now as far as the water reulator? I am not sure...try it.

Now as far as the water reulator? I am not sure...try it.

Thanks,

Pete

Pete

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by SprinklerHead</i>

<br />I too have used the Toro 53351 flow/pressure meter and found it to be way off from the 5 gal bucket calculation method, (I am still trying to find someone who can explain that). To get a good idea of your flow at the design pressure, attach a hose to the hose bib near the meter inside the house. Run the water from there into a drain or sump crock and bring the flow up until the pressure stays constant at or above the design pressure (You may have to fasion a few fitings and a gauge to messure the pressure while you do this if there is not already one in place). Once the pressure stays constant for several minutes, fill a 5 gal bucket and measure the time to do so. You may want to do this several times and take the average number. Then complete this calculation, 60secs / secs to fill 5 gals x 5 = gallon per minut of flow. Be sure that you know the point at which your bucket measures 5 gals as many actually hold more than that.

<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

<br />I too have used the Toro 53351 flow/pressure meter and found it to be way off from the 5 gal bucket calculation method, (I am still trying to find someone who can explain that). To get a good idea of your flow at the design pressure, attach a hose to the hose bib near the meter inside the house. Run the water from there into a drain or sump crock and bring the flow up until the pressure stays constant at or above the design pressure (You may have to fasion a few fitings and a gauge to messure the pressure while you do this if there is not already one in place). Once the pressure stays constant for several minutes, fill a 5 gal bucket and measure the time to do so. You may want to do this several times and take the average number. Then complete this calculation, 60secs / secs to fill 5 gals x 5 = gallon per minut of flow. Be sure that you know the point at which your bucket measures 5 gals as many actually hold more than that.

<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

Bob

Oops, I think I posted an empty message, sorry.

I am desiging am irrigation system for a house in Italy. There are many challanges, including the fact that the water supply is a well. I had thought to measure the capacity using the Toro 53351, but maybe not... I would still like to try this method, does anybody have one they would like to sell?

I am desiging am irrigation system for a house in Italy. There are many challanges, including the fact that the water supply is a well. I had thought to measure the capacity using the Toro 53351, but maybe not... I would still like to try this method, does anybody have one they would like to sell?

Bob