Installing Clack Retention Tank on Water Well

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Let's get this big retention tank installed!

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Well since I couldn't seem to get any guidance from anyone, I'm just going to wing it! Basically I had two options, install it before, or after, the pressure tank.

I think for maximum retention time, it should have been after the pressure tank, and I should have restricted the water flow from the pressure tank to the retention tank. Then, if the well pump out-ran how fast the water could flow to the retention tank, it would shut off sooner, and then water would slowly move through the retention tank and into the house.

As it is, it's plumbed before the pressure tank. This puts a little more back pressure on the well pump, due to the friction differential in the lines. Flowing pressure differential is about 10-15 psi, so the well pump will see 15 psig higher than the pressure tank, plus hydrostatic, before the pressure tank tells it to shut off. I guess though, hyrdostatic pressure is a much larger part of that equation, so maybe the the 10-15 psi at surface doesn't really matter. However, the other issue is that the water now flows much faster through the retention tank, on it's way to the pressure tank before the pump shuts off. But then the water also sits totally still in the retention tank longer perhaps between pump cycles.

Now I'm wondering if the volume in the retention tank is nearly the same as the volume required to fill and shut off the pressure tank. If so, then each time the pump runs, it would only rotate water from the settling tank to the pressure tank. That would be perfect, as the water then actually sits static in the retention tank longer.

Who knows, in the end perhaps it's a wash, no pun intended. It would be neat to have a pressure gauge on the retention tank to see if pressure starts falling on it as pressure starts falling on the pressure tank, or if it holds more steady.