Review on HQUA TWS 12 UV Purifier Sterilizer for Optimal Purification by Tammy Freeman

I have used 5 to 7 of these in my homes. I recommend vertical (this one) over horizontal. Make sure you have about 6 inches of copper pipe at each end, then continue with the main pipe (PEX for me). I don't know why the reviewer asked me about thickness and flavor but I'm sure. I think the plumbing is simple enough. I buy this and save compared to buying a similar Masters UV light for $650 with lamps that cost 2-3 times more. Try it.