CSV and Pressure Tanks

[rivergal]

I have some questions about the way our well company set up our new 4" well pump. The install included a Sta-Rite 1hp submersible, CSV, and 4.8 gallon pressure tank. My question is about the 60 gallon conventional pressure tank that they also hooked up on the line about 30 ft from the well (this pressure tank was one we had for our old well).

Since CSVs are intended to be used with a small tank (like the 4.8), does having the additional tank help or hurt the installation, or make no difference? Also, does it impact the flow rate of the well or the lifespan of the pump?

Hoping valveman is around to answer in particular.

[valveman]

I don’t really understand the reason for the 60 gal conventional tank. They are sometimes used for aeration of smelly water or as a settling tank for sand and solids. As long as it is after the CSV it won’t hurt anything. If there is no an air maker system on it, the tank will eventually waterlog and not give any drawdown, but the 4.8 gal tank will still make everything work OK. If there is an air maker system on the conventional tank, it will add to the draw down from the 4.8 gal tank, which can be a good thing.

Shouldn’t affect the flow rate or lifespan much either. Your well company is smart enough to be using Cycle Stop Valves, so they must know what they are doing.

[rivergal]

I don’t really understand the reason for the 60 gal conventional tank. They are sometimes used for aeration of smelly water or as a settling tank for sand and solids. As long as it is after the CSV it won’t hurt anything. If there is no an air maker system on it, the tank will eventually waterlog and not give any drawdown, but the 4.8 gal tank will still make everything work OK. If there is an air maker system on the conventional tank, it will add to the draw down from the 4.8 gal tank, which can be a good thing.

Shouldn’t affect the flow rate or lifespan much either. Your well company is smart enough to be using Cycle Stop Valves, so they must know what they are doing.

Not sure why either, except that it was there, but so is a huge holding tank, which I would think would be a better possibility for aeration (yes, I do have smelly water). It is after the CSV, and I agree that they were smart to put that in . The guy who hooked up the tank was an assistant of the owner of the well company, who wasn't there at the time. Just wanted to be sure what the assistant did was kosher.

Thanks for your help!

[ballvalve]

I hate to say this but, your CSV is in the WRONG place if its before a large storage tank. Not too smart on that point. The Rabbi would NOT stamp that kosher!

The CSV must be in the pressurizing part of the flow OUT of the storage tank. You should have a float switch on that big tank.... unless there is something peculiar about this set up not revealed here.

Well - storage tank with float switch- outflow pump inside or out of the storage tank- CSV-small tanks[s] -pressure switch - house

[rivergal]

I hate to say this but, your CSV is in the WRONG place if its before a large storage tank. Not too smart on that point. The Rabbi would NOT stamp that kosher!

The CSV must be in the pressurizing part of the flow OUT of the storage tank. You should have a float switch on that big tank.... unless there is something peculiar about this set up not revealed here.

Well - storage tank with float switch- outflow pump inside or out of the storage tank- CSV-small tanks[s] -pressure switch - house

Here is the layout of the well to tank:
1. Well with submersible pump
2. Check Valve
3. CSV
4. Pressure gauge
5. 4.8 gal pressure tank
6. Control switch
=== about 30' of pipe ===
7. 60 gallon pressure tank

This is the image from cyclestopvalves.com:


Just to be clear, what I have right now is a pressure tank, not storage tank. However, if I were to use the large storage tank, which I also have but isn't installed, you're saying that the placement for that should be between the check valve and the CSV (between C and D in the image)? Also, is having the current extra pressure tank where it is a problem?

[ballvalve]

When you hook up the big static tank, the flow into that tank should be on a float switch. Very few pump runs per day or week. the outlet of that tank becomes your "well" in the above diagram then. You would need another pump in or at the static tank to be the "well" pump. [a and b would be in or at the big tank]

Incidentally, for valveman, I do not see a feed to the house on that diagram. I think "H" should be house, and the bib indicated next to the pressure relief valve. Also it looks like an additional above ground check valve shown, which I know you do not advocate..... [ does not bother me to have them] . Maybe that dotted line is a static storage tank, then the CV makes sense

[valveman]

I have been meaniing to make a new drawing for years. In that drawing, "C" should say "only one check valve on the pump in the well" because a CSV does not check.