/ My Industrial Cabin Build #2,731
- Jul 12, 2012
- International, Kubota, Komatsu
With or without a generator with a smaller tank, the pump will cycle a lot more with the new washing machines that cycle water on/off all the time, and a toilet flush causing the pump to cycle vs having the pump run a minute longer to build the 10 gal drawdown - there isn't a downside to having the storage to reduce cycling - just a benefit.
The only downsides to having a large pressure tank or two is having to wait 7 minutes in 3 GPM shower for the tank to empty as the pressure drops from 60 to 40, the pump to come on, and finally get good strong constant pressure to the shower. With a small tank you have constant pressure in less than a minute. Also, the cost of those tanks is a downside, as they are not cheap. Space and heat are a couple other downsides. But the CSV will work with any size tank you want. Set at 58 PSI when using a 40/60 switch you still get 2 minutes of run time to fill the big tank(s).
I have a 10 gallon size tank with 2 gallons of draw. If my washing machine makes the pump come on more than 2-3 times during a load, then it is not saving water as advertised. I just leave the generator running while everyone is taking a shower and filling buckets. Fortunately, my power is very dependable and my only problem is keeping the generator gas fresh, as I forget how long it has been sitting there.