they were okay,but depending on your water quality,they can be kinda a nightmare,we have very hard water and caused some problems,about the time you really needed the thing to work it would let us down.clay manufacturing has been defunct for a few years,but i think brower bought out their interests,but i don't see anything about circulating waterers on their website,might shoot them a email,sometimes these companys will have some parts rat holed away.  good luck.    got some pics of the huts?