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Frequently Asked Questions / Quick Question on backflow properties of Cycle Stop Valve setup
« on: December 08, 2019, 12:27:03 AM »
Hello, while looking to design and upgrade my current well setup, I stumbled upon the term "CSV" while looking into various pump options. After a quick Google search, I immediately recognized the value of such an addition and wanted to incorporate it into my alleged setup. I'm currently designing a two house setup using a single well and pump. Given the dynamics of my hypothetical setup, I arrived at my intention to use two cycle stop valves just before entrance to each house. The reason for this was, I noticed there wasn't much literature on the PSI drop beyond the CSV if used on the "main line" close to the pump itself. I noticed that most use cases designed the CSV to be close to the pump without taking to account the additional head pressure loss or total dynamic head loss beyond the CSV. For example, a 50PSI setting CSV at the peak of the well pipe with an additional horizontal pipe run of 200 feet of 3/4" pipe would result in a 45PSI rating at 10GPM at a house 200 feet away. I doubt many would notice, but in larger or longer setups, this could quickly become relevant and might be a good topic to cover if not already. Then again, I perhaps, simply missed it while searching this forum.
Regardless, my ultimate question is this. At what rate does a CSV allow for backflow, if any at all? Particularly for a CSV125-1 model. My unique setup has a main house and a "guest" or "party house" which is mostly unused, but, in which I intend to tee off from the main line with the sole reservoir tank being located under the main house which is nearly 600ft away. To give a crude drawing, see below:
Well--(Backflow valve+Tee)---------------(330ft TDH)-------------------CSV+(52g pressure tank) (12.8 draw down at 40-60 PSI)---Main house
|
|
(250ft TDH)
|
|
CSV (no tank)
|
House
While I understand the pressure drop from the friction of the pipe given this distance, I'm curious if the backflow of the CSV at the main house pressure tank will allow for unrestricted back pressure flow to the second house at 40/60. I understand this is an unconventional system, and I'm prepared for the additional cost of running it correctly with a central flow point, but under the basis of simple cost savings of running additional pipe near service entry power lines, would this system work and allow the pressure tank to back flow to the second house at 40/60? I apologize if this seems ignorant, but I couldn't find a cut away diagram that showed the internals of a CSV product.
Thanks,
Aaron
Regardless, my ultimate question is this. At what rate does a CSV allow for backflow, if any at all? Particularly for a CSV125-1 model. My unique setup has a main house and a "guest" or "party house" which is mostly unused, but, in which I intend to tee off from the main line with the sole reservoir tank being located under the main house which is nearly 600ft away. To give a crude drawing, see below:
Well--(Backflow valve+Tee)---------------(330ft TDH)-------------------CSV+(52g pressure tank) (12.8 draw down at 40-60 PSI)---Main house
|
|
(250ft TDH)
|
|
CSV (no tank)
|
House
While I understand the pressure drop from the friction of the pipe given this distance, I'm curious if the backflow of the CSV at the main house pressure tank will allow for unrestricted back pressure flow to the second house at 40/60. I understand this is an unconventional system, and I'm prepared for the additional cost of running it correctly with a central flow point, but under the basis of simple cost savings of running additional pipe near service entry power lines, would this system work and allow the pressure tank to back flow to the second house at 40/60? I apologize if this seems ignorant, but I couldn't find a cut away diagram that showed the internals of a CSV product.
Thanks,
Aaron