best way to split water meter for ADU / Duplex?

[Marcus Tam]

What is the best way / most cost effective way to split water bills between the mainhouse and the adu i am renting out? 

I called a few submetering companies but they only do commerical buildings. and with submeteres, i think someone has to physically be there to calculate the useage in the meters, divide the bill etc. that sounds like a lot of trouble, especially if i dont live on site.

any other solutions? 

[Jill F.]

check out FLOWS.com

I ordered flow meters  and wired remote readers and had my handy man install them on my duplexes. They are only a couple hundred bucks each and flows.com was VERY helpful allowing me to pick the proper products. This is only possible if you are certain that the plumbing supply lines for each unit are separate (you should be good if each unit has it's own main shut off).