FYI -- If you've used X10 before, you know that appliance modules, as opposed to lamp modules, are your only option for controlling pumps, lights, etc. These modules are built around a relay that produces a fairly loud click when they turn on/off, and this can be pretty annoying, especially when used for wavemakers. (Lamp modules, althought silent, supposedly will not work for anything other than incandescent loads.)
I recently discovered an X10 DIY site that gives details on how to convert an X10 lamp module into a silent appliance module (capable of controlling powerheads, ballasts, etc.) by replacing some internal circuitry with a solid-state relay. I tested it and it works great! The link is
here. (You'll have to scroll down.) The lamp module is about $12.30 (at HomeTech) and the SS relay is about $9.50 (at Mouser). A $.05 22uF capacitor is also needed.
There were other how-to methods for making silent appliance modules at the DIY site's
main page, but the one I used seemed like the easiest, best way to get it done (but not necessarily the cheapest).
(Note: the disclaimers offered by the authors of the modification instructions also apply here -- opening an X10 module voids its warranty, hazardous voltages and the risk of fire exist, etc. This modification should only be attempted by someone having soldering/de-soldering experience and the proper equipment.)
