I have been unable to find a good description of Jandy's 3-way Neverlube valves on their website. Maybe I was looking in the wrong place. None of the pool stores in my area carry Jandy valves (Hayward only). The people at the stores are unfamiliar with them and not very willing to find out what I need to know. At any rate, I have a few questions to ask.
1. The Neverlubes are listed as either 1 1/2-2" or 2-2 1/2". Does this mean that pipes of either diameter can be connected to that valve without an adapter? How do they achieve this? Does the bigger pipe go outside the port and the smaller inside? Or is the inside of the port stepped?
2. My plumbing is 2". I assume I could use either size valve. But is there a difference in the size of the internal pathway between the two sizes? I'd prefer the larger, so as to reduce pressure loss.
3. Can the valves be configured so any of the three ports can be the "common"?
4. My understanding of a 3-way valve is that either port can be selected by itself, or both can be selected at the same time. Is this right? Is it possible to shut it completely, so that no water flows through the valve?
5. Where can I get information such as dimensions? My pool equipment is in a pump room and space is a bit tight. It would be helpful to know how big they are.