wayne fajkus wrote:We are running ours with just the spindown filter so there is no continued expense in operating it. I have a uv light but it is broke and i never repaired it. My main concern is that no sunlight hits the water. That's all i have. While the rainwater only goes through my hot water heater (cold water side is well water) , it is used for cooking, bathing, brushing teeth, dishes, etc. We have had no health issues.
There seems to be an upfront icky concern with rainwater here in the USA. If you go to other countries the ick concern is not there, primarily because it is normal to them. They use big tanks and allow sediment to fall to the bottom. They pull the water from the middle of the tank. As far as i can tell, uv filters are not used. But i say do whatever makes you feel secure about it. Peace of mind goes a long way.
Is the system automated? Are you looking for "city type" flow, or a basic off grid type system? A little more info on that will help. Mainly if it is a pressurized system. How to hold the pressure (pressure valve, back flow preventer, pressure tank). Thats where filter location comes into play. At least it did on my well side of system.
Douglas Campbell wrote:The vitapure unit you show uses (I think) a long finger UVC llamp in a cylinder through which the water flows.
The UV lamp has a life span and is prone to fouling, check if it is easily cleaned/replaced.
If you have it that should be the last step before the tap and the run from the vitapure to tap should be as short as feasible.
It will also pull some power if you are offgrid.
Maybe just one potable tap with the unit directly beneath.
There are first flush tank designs to go between your down spout and your first capture tanks, to allow the roof and downspout system to flush before delivering water to the potable system.
Think about your roof material, overhanging vegetation and level of bird droppings. Not good to flush pigeon poop into the system.