Thread: Horizontal tailpiece used for DW attachment

This morning's drain plumbing: dishwasher connected to DW tailpiece adapter employed as part of a horizontal run to a center outlet waste tee above the trap inlet.

Is there a specific prohibition against using this tailpiece in this manner?

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Originally Posted by Michael Thomas

Is there a specific prohibition against using this tailpiece in this manner?

You mean other than it is not designed or intended to be installed horizontally like that?

SECTION P2607
WORKMANSHIP

P2607.1 General.

Valves, pipes and fittings shall be installed

in correct relationship to the direction of the flow. Burred ends
shall be reamed to the full bore of the pipe.

P2608.2 Installation of materials.

All materials used shall be

installed in strict accordance with the standards under which
the materials are accepted and approved. In the absence of such
installation procedures, the manufacturer’s installation instructions
shall be followed. Where the requirements of referenced
standards or manufacturer’s installation instructions do not
conform to the minimum provisions of this code, the provisions
of this code shall apply.
P2608.3 Plastic pipe, fittings and components.

All plastic

pipe, fittings and components shall be third-party certified as
conforming to NSF 14.
P2608.4 Third-party testing and certification.

All plumbing

products and materials shall comply with the referenced standards,
specifications and performance criteria of this code and
shall be identified in accordance with Section P2608.1. Where
required by Table P2608.4, plumbing products and materials
shall either be tested by an approved third-party testing agency
or certified by an approved third-party certification agency.

Thanks. My usual "in a manner not approved by the manufacturer" really ought to be enough in such cases, I just wanted to have the code citations handy if need be. I guess I really ought to buy the set on CDs, but I'm saving my pennies for an IR camera as I know I've lost a few inspections lately to competitors who have them.