Signature Elite | 1,000,000 Gallons Whole House Water Treatment System with 48,000 Grains Fine Mesh Resin and KDF85 Carbon Media and 12 GPM Quantum UV deactivator System

does the activate carbon or copper/zinc tank need to be replaced? If so how often and how expensive?

Our media tanks normally last between 8-10 years, depending on water quality. You can see the cost of both just the media and replacement tanks via the link below:

https://aquasureusa.com/search?type=product&q=media*

1. How to request for 3/4" connectors? There is no option at checkout. 2. Also, how much is the warranty?

Please contact us after placing the order and we will send out the 3/4 connectors for you. 
It is a one year standard warranty with purchase, if you register within 60 days of purchase, you will receive a free extended 4 year warranty.

What size valves does this system use? How much water on average per month does it use for regeneration (2 people) Signature Elite Series Whole House Water Filter System | 1,000K Gallons - AS-SE1000A

Thank you for reaching out to us. 
If you are talking about the inlet and outlet valves, the system comes standard with a 1" yoke connector, but we also have 3/4" available upon request. 
Without knowing your water's hardness, the 48,000 Grain Harmony uses about 45-60 gallons of water when it regenerates. Typically, we want the system to regenerate within 2-4 weeks to maintain its lifespan and efficiency, so in a month you would go through about 90-120 gallons if it is regenerating twice a month. I hope this helps. 
For more information, please reach out to us via email at Support@aquasureusa.com

How long does the backwash take to complete for the water treatment tank? What size is the internal distributor tube on the water treatment tank? Where is the product manufactured? On both the water treatment and the softener do they have full port valves?

Hello,

The backwash, or Regeneration cycle, takes about 1 hour and 45 minutes to complete. 

The size of the internal distributor tube inside the water treatment tank can vary depending on the size of the resin tank which can be from about 40" to 50".

Aquasure Harmony Water Softeners are designed and built in the U.S. 

On both the water treatment and the softener, they are sized for 1" to 3/4" NPT.

Does your water treatment tank backwash like the water softener?

Yes, if you choose the add-on feature, our Fortitude Pro series is capable of backwashing like our water softener. The time frame for backwashing the tank will vary, depending on your home’s specific needs, but typically, we recommend backwashing the tank every 7-10 days.