Is your shower upstairs? Then you should consider looking into VXpipe that we are now selling at our HeatSnagger Shop. Vertical heat exchangers for greywater have been around for a long time, and many companies make products based on the same principle. The VXpipe is made by BRIES in the Netherlands. It is the only one made by a combination of copper and PVC pipes, which makes it less sensitive to the rising cost of copper. Get more information about the product at our HeatSnagger Shop