These were definitely a waste.  The plumber told me immediately he would not install them. DO NOT PURCHASE ANY accessories like these from WAYFAIR.  I have been a very loyal customer but.... The return policy is totally unreasonable. I wasted 300 dollars on two of these and they are really not very high quality for the price.   If they were I think they would have given me store credit.  It is an accessory that they are trying to make a bit of extra money on with the primary item. These would be difficult to install and there is NO consolation for guessing wrong.  The type of fittings are absolutely obsolete and my plumbers were concerned they would cause a failure and recommended other fittings.  Save your resources.