Big Box stores everywhere. I'm sure the units work, but I'd rather not have the lowest cost lowest quality gig. You guys have been a great resource. I'm want a unit that will last and be serviceable. From what I gather here, a fleck or clack valve is what I'm after. Only one place in town that sells them. They used to deal in fleck, but now deal mostly in clack valves (Hellenbrand) They would have me believe that the Fleck quality has stagnated, but their clack setups are $1500-$1700. Low number for a 1.0cu ft promate 1.0 with 8% resin, the high number for a promate 6.0 head with 10% resin. Are there any quality Fleck valves? Anyone heard anything about the new promate 6.5 heads? I'm just putting a unit in my house, 5 people, 2 baths, 9-14 grain city water. Heavy chlorine. I have above average DIY skills, and will be plumbing it myself. I see units at places like qualitywaterforless.com for way under those prices, but perhaps there are subtleties I'm unaware of?