Laundry room manifold
What's wrong here?
- Nothing. This installation is compliant
- Each fixture still needs its own stop valve at the fixture
- Vertical PEX must be clipped every 32 in., the same as horizontal runs
- Manifold valves must carry permanent engraved metal tags, not a printed label strip
Show the answer and the code reference
The answer
Nothing is wrong. The manifold valves are accessible and labeled for the fixture each one serves, so they serve as the fixture control valves, and the PEX is supported the way Table 313.3 requires.
Correct choice: 1. Nothing. This installation is compliant
In a parallel (home-run) water distribution system, UPC 606.5 allows the control valve for each fixture to be at the manifold instead of under the fixture, provided each valve is identified with the fixture it serves. Only a manifold in an attic, crawl space or other place that is not readily accessible forces a second valve at each fixture. These manifolds are in an open laundry room, each outlet has its own quarter-turn valve, and the label strips name every fixture. The vertical PEX is supported at the base (the manifold), guided at mid-height by a clipped 2x4, and held at the top plate, which matches the vertical PEX entry in Table 313.3.
How to fix it
No correction needed. Keep the label strips legible and the manifolds uncovered; if a wall is ever finished here, leave an access panel large enough to reach every valve.
Code references
UPC 2018 606.5 — Control Valve
A control valve is required immediately ahead of each water-supplied appliance and each slip-joint or appliance supply. Parallel water distribution systems may provide the control valve either immediately ahead of each fixture or at the manifold, identified with the fixture supplied; where the manifold is in an attic, crawl space or other location that is not readily accessible, a separate shutoff valve is required immediately ahead of each fixture or appliance.
Drills citing 606.5UPC 2018 313.3 — Suspended Piping
Piping is supported at intervals not exceeding Table 313.3. For PEX the table calls for 32 in. horizontal spacing (1 in. and smaller) and, vertically, support at the base and at each floor with mid-story guides.
Drills citing 313.3
Minnesota
Minnesota adopts the 2018 Uniform Plumbing Code with Minnesota amendments as the Minnesota Plumbing Code (Minn. Rules ch. 4714, effective Dec. 17, 2021). No Minnesota amendment to 606.5 is known; check ch. 4714 before relying on it. Search-result snippets indicate Minn. Rules 4714.0313 restates Table 313.3 with the same PEX spacing as the model code; that was not confirmed.
About the Minnesota Plumbing CodeWhy the other choices are wrong
- Each fixture still needs its own stop valve at the fixture. UPC 606.5 lets a parallel (manifold) system put the control valve at the manifold instead of at each fixture, as long as each valve is identified with the fixture it serves. A separate stop at the fixture is required only when the manifold is in an attic, crawl space or other place that is not readily accessible. This one is in an open laundry room.
- Vertical PEX must be clipped every 32 in., the same as horizontal runs. The 32 in. figure in Table 313.3 is the horizontal spacing. Vertical PEX is supported at the base and at each floor with a mid-story guide, which is what the manifold, the 2x4 nailer and the top plate provide here.
- Manifold valves must carry permanent engraved metal tags, not a printed label strip. UPC 606.5 requires the valves to be identified with the fixture served; it does not call for a particular tag material. The manufacturer's label strip does the job as long as it stays legible.