As a result of my tests, I determined that this internal counter fitting is a serious liability. While the size and build materials seemed compatible, the overall design is fundamentally flawed - leading TO system leakages and failure. The only positive to report is that the company was responsive to my initial complaints, but even after their technical support team weighed in the fitting continued to malfunction. It was a frustrating and costly experience, and I cannot recommend this product toSee full review