Hey guys, I've got a bit of a question for you. I just moved into a house a few weeks ago that was constructed less than one year ago. Although the house (overall) is fine, my gripe is with the hot water. In an effort to save a buck, the developer put in a tankless water heater at one end (of a long, skinny floor plan), and didn't put in a hot water return loop for a re-circ system. Now, when turning on the water in the master shower, it takes roughly 5-6 minutes for hot water to reach the fixture. I've settled on installing a re-circ pump with a cross-over at the furthest fixtures, but that's where I've hit a roadblock. Ideally, I'd like a re-circ pump with an aquastat that keeps track of the water temp at the farthest point in the line, and kicks on when the temp falls below a certain temp. However, I've only seen pumps that are demand-controlled, and require you to turn on a (any) fixture for a moment to get the process started. The other option I've found would be a "timer" re-circ pump. But, I haven't seen any that are compatible with tankless water heaters. To throw a wrench into this, the way the plumbing is layed out, I have two fixtures that could qualify as "the furthest fixture"....the master bath and the kitchen sink. If any of you know of a re-circ pump that would accommodate two senors (one in the master bath, and the other in the kitchen) that would be ideal. Thanks in advance for the suggestions.