Here is a Canadian source for this dispenser - it may in fact be where it originates: http://www.winemakeri.com/Wine_dispenser_p/17132.htm

With respect to the precipitate, it seems to me that if one is using X-Tol in a replenishment regime, small amounts of precipitate in the replenisher solution are unlikely to be a problem, so the dispenser should be perfect for it.