Orbit 57184 Green Heavy Duty Swivel Double Union Coupler

The Orbit 57184 Green Heavy Duty Swivel Double Union Coupler is a useful tool for connecting multiple manifolds together. It has a unique threading that allows for rotation before final tightening. The product does not require Teflon tape since it has built-in gaskets. It is compatible with 1-inch pipes, but an adapter can be used to reduce it to 3/4 inches. The fitting is a threaded connection and can be used to attach two manifolds together. Feedback from customers is mixed. Some found it to be a good quality, heavy-duty adapter that works well and is easy to install. However, others warned against buying the product, as they experienced problems with leaking and defective couplings. Some also found that the fittings were proprietary, which made it difficult to find replacements when needed.