15mm Pex Fresh Water T fitting source

[Bacchus]

Yes, thanks to all for the help. Now I understand how these work.

However does anybody know why Mainship removed all the Horseshoe type collars for all the connections?

All of the fittings at the manifold have no collars on them, at least on my Mainship 40.

They probably are not necessary normally, like in a house but boats move around and vibrate a lot so I would think leaving them there would be a good idea.

Jeff

They didn't remove them just never installed them. They are optional and I've never had one come apart due to vibration.