Terminology or Actual Difference

josephny

Wondering if there is a difference between "manifold" and "multi-port tee?"

I see that both manifolds and multi-port tees can be open on both sides or closed on one side.

I see mention of code allowing multi-port tees to be inaccessible after being built (i.e., no access panel needed). Not sure about manifolds.

Thank you.

josephny

Hmmm....

Is my question too basic? Or off-the-mark in some way?

hot_rod

That is a really good question, when a tee becomes a manifold? At times it had to do with the type of connections.A union for example, a mechanical connection, compared to a coupling.
Then there is accessible and readily accessible. Accessible allows a door or cover, I think.  Might look for a current code interpretation guidebook.
Often it comes down to what the inspector that shows up will accept😉

Ironman

The code requires accessibility when there’s a mechanical joint like a union or compression fitting. In other words, one that can be taken apart with wrenches. Screw joints, press fittings, soldered joints, glue joints, heat fusion, etc. don’t require accessibility.

ratio

I would think valves, especially balancing valves, would turn a multi-port tee into a manifold. But, I'm just a warshed up electrician, so take that with a grain of salt.

EdTheHeaterMan

ratio said:

I would think valves, especially balancing valves, would turn a multi-port tee into a manifold. But, I'm just a warshed up electrician, so take that with a grain of salt.

If you use water to "Warsh-Up" I think that Qualifies.

josephny

Thank you guys! I suppose it's safe to to use the term multi-port-tee when it's a permanent/seal and never meant to be accessed or changed (unless it breaks), and use manifold otherwise.