Replace manifold with trunk/branch?

[JP1000]

We are doing a kitchen remodel and replacing polybutylene pipe with pex. The current system has a manifold with individual runs to each fixture and a booster. The plumber we are considering for the project is advocating to get rid of the manifold completely and to go with something like a more traditional trunk/branch configuration. Large copper trunk and pex branches. Plumber has cited historical problems with manifolds and leaks and said many plumbers have moved away from manifolds.

It's a decent size house with 3 full bathrooms (one in basement) and a powder room. I'm concerned about pressure when multiple fixtures are in use (teenage daughters) and then not being able to shutoff individual water lines if needed (dishwasher, showers, etc.).

Does eliminating the manifold make sense?

Thanks

 

[John Gayewski]

You should be able to shut off every line individually at the main and at the fixture. That shouldn't factor into the decision.

Water piping is sized so that volumes aren't effected when different lines are used. That shouldn't factor into the decision.

The decision is just preference. Most plumbers prefer to run a trunk a branch system. If he saw your system and decided that was better I would guess it's better and probably cheaper.