Multifamily Plumbing Fixture Supply: A General Contractor's Guide to Division 22 Specialties

Multifamily plumbing fixture supply is the Division 22 scope that procures, delivers, and stages the sinks, shower pans, tub surrounds, and trim kits that a licensed plumbing sub connects. It is a supply-and-logistics role, not an installation role. The licensed plumber makes every rough and final connection. The fixture supplier makes sure the right fixture, in the right finish, compatible with the installed valve body, reaches the right floor on the day the plumber is trimming it out. Get that handoff wrong and the trim-out schedule stalls across the whole building.

This guide covers what the scope includes, where the supply line ends and the install line begins, how to specify fixtures against the standards that govern them, the water-efficiency rules that now apply across the western states, and the coordination steps that keep procurement errors off your critical path. It replaces four separate state-specific pages we published earlier, because the fundamentals do not change at a state line. What changes is delivery logistics and a few code overlays, and those get their own section below.

What Division 22 plumbing fixture supply covers

Under CSI MasterFormat, Division 22 is Plumbing, and section 22 40 00 is Plumbing Fixtures. On a multifamily interior finishes package, the fixture supply scope typically covers:

Kitchen sinks, in the model and configuration set by the unit-type matrix
Bath sinks and vanity bowls in the specified finish and mounting style
Shower pans, confirmed against the rough plumbing drain location
Tub surrounds where specified in place of tile
Faucet, showerhead, and tub-spout trim kits in the brand and finish compatible with the installed valve bodies
Accessory trim kits and drain assemblies that ship with the fixture packages

The scope ends at delivery and site-logistics coordination. It does not include rough plumbing, valve installation, or final connections. Those stay with the licensed plumbing subcontractor, who owns everything behind the wall and every connection at the fixture.

Supply versus install: where the line sits

The cleanest way to define the responsibility split is by the valve. The plumber roughs in the supply lines, sets the valve bodies during rough plumbing, and returns at trim-out to connect the faucet, showerhead, and drain. The fixture supplier owns everything up to that connection: procurement, submittals, finish coordination, delivery timing, and staging.

Two failure points live on this boundary. First, the trim kit has to match the valve the plumber already set, which makes pre-procurement coordination a hard requirement rather than a courtesy. Second, when the plumbing sub and the fixture supplier sit under separate subcontracts, the general contractor absorbs any gap between them. If the two are not talking before procurement, the GC owns the compatibility problem at installation. On a single-subcontract interior finishes package, that coordination moves inside one company’s process instead of onto the superintendent’s checklist.

Fixture selection and specification

Specify fixtures against named standards, not brand names alone, so a substitution request can be judged on equivalence. The ASME A112 series governs the fixtures on a multifamily unit:

Fixture element	Governing standard
Faucets and supply fittings	ASME A112.18.1 / CSA B125.1
Ceramic fixtures (lavatories, water closets)	ASME A112.19.2 / CSA B45.1
Stainless steel sinks	ASME A112.19.3 / CSA B45.4
Shower and tub drains	ASME A112.18.2 / CSA B125.2

Beyond the standard, the spec has to lock down the model number, finish, mounting configuration, and the unit type each applies to. On a project with four unit types, sink models, trim finishes, and shower pan sizes often vary by type. A procurement that treats all units as identical, without checking each line against the unit-type matrix, produces delivery errors that cost far more to unwind than the matrix review would have cost to run.

Water efficiency: WaterSense and the western-state overlay

Fixture flow rates are regulated, and on multifamily work in the western states the regulation is often stricter than the federal floor. The federal maximums under the Energy Policy Act are 2.2 gpm for lavatory faucets, 2.5 gpm for showerheads, and 1.6 gpf for toilets. The EPA WaterSense program sets tighter voluntary limits: 1.5 gpm lavatory faucets, 2.0 gpm showerheads, and 1.28 gpf for high-efficiency toilets, all while meeting performance criteria so the fixture still works.

Several western states have written WaterSense-level limits into state law for fixtures sold in-state, so the WaterSense number is effectively the code number in those markets. Colorado, Washington, and Oregon all enforce state water-efficiency standards that meet or exceed the WaterSense thresholds. The practical takeaway: confirm the specified fixture’s flow rating against both the project spec and the state standard before ordering, and require the WaterSense label where the developer is pursuing green certification or a utility rebate. A fixture that fails the state flow limit cannot be installed, and finding that out at delivery is the expensive way to learn it.

Trim kit compatibility: the most common procurement error

The single most frequent Division 22 mistake is ordering faucet and showerhead trim kits before confirming the valve body they mount to. Trim kits are valve-specific. A Moen trim kit does not fit a Delta valve. A Kohler trim kit does not fit a Price Pfister valve. Order the trim before you confirm the valve and you are on a near-certain path to hardware that gets returned and reordered, with the lead-time hit that comes with it.

Before any trim kit order goes out, the supplier needs the valve brand and model for each application from the plumbing sub’s approved submittal: kitchen faucet valve, bath faucet valve, shower valve, and tub spout. Take that off the submittal in writing, not off a verbal in the trailer. Confirm, then order.

Sink cutout and shower pan coordination

Two other coordination steps have to happen before fabrication and rough-in, and both cause expensive rework when they slip.

Sink cutouts drive the countertop. The sink model determines the cutout dimensions, so the supplier has to hand the countertop fabricator the sink model and the manufacturer’s cutout template before the countertops are cut. A slab fabricated to the wrong cutout cannot be corrected in the field without risking the stone, and refabrication adds roughly two weeks to countertop delivery. On multi-unit-type projects, the fabricator needs a template for each sink model, organized by unit type.

Shower pans have to match the drain. Confirm the pan against the rough plumbing drain location before procurement so the pan center aligns with the drain center. On new construction, the supplier gives the GC the pan dimensions before the plumber sets the drain, so the drain follows the pan. On renovation work where the drain is already fixed, select the pan to fit the existing drain instead.

Lead times and procurement sequencing

Fixture lead times run from a few weeks for stocked domestic sinks and standard trim to several months for specified premium and imported lines, and the long-lead items set the schedule. Sequence procurement so the items with the longest lead and the most coordination dependencies get released first:

Lock the fixture schedule and unit-type matrix, so quantities and models are final.
Pull valve brands and models off the plumbing sub’s approved submittal.
Release trim kits against confirmed valves and the project finish package.
Release sinks and pans, and transmit cutout templates to the fabricator.
Build a phased delivery schedule against the plumber’s trim-out sequence.

Order trim before valve confirmation or countertops before templates transmit, and you have manufactured a delay that no amount of site coordination recovers.

Delivery phasing and site logistics

Multifamily sites rarely have secure, climate-controlled storage for hundreds of fixture boxes. Delivering every fixture on day one creates theft, damage, and storage-management problems on a constrained site. The standard answer is phased delivery, timed floor by floor to the plumber’s trim-out sequence.

The supplier should hand the GC a delivery schedule at project start that phases fixtures by floor against the projected trim-out sequence, then update it as the schedule moves. Distribute that schedule to the superintendent and the plumbing sub so all three parties plan from the same dates. On dense urban sites, delivery also means booking freight elevators, coordinating delivery windows with the superintendent, and pulling street-use permits where a truck needs lane space.

Hardware finish coordination across divisions

Class A developers increasingly specify one coordinated finish package across cabinet pulls in finish carpentry, toilet and bath accessories in Division 10 specialties, and the plumbing trim kits in Division 22. Matte black, brushed gold, and polished chrome are the common packages. The fixture supplier has to order to that finish spec, not to a default. A trim kit that shows up in brushed nickel on a matte-black project gets returned and reordered, and the delay compounds down the trim-out schedule. When Divisions 6, 10, and 22 sit under one subcontract, that finish coordination is internal. When they are split, the GC distributes the spec to all three and confirms receipt before anyone orders.

What to require from your fixture supplier

Before you award the scope, require the supplier to commit to the coordination steps that keep it off your critical path:

Trim kit compatibility confirmed against the plumbing sub’s approved valve submittals before any trim order
Sink cutout templates transmitted to the countertop fabricator before fabrication, organized by unit type
Shower pan dimensions confirmed against the drain location before procurement
Fixture flow ratings confirmed against the project spec and the applicable state water-efficiency standard
A phased, floor-by-floor delivery schedule tied to the trim-out sequence, updated as the schedule moves
Finish ordered to the coordinated hardware package, not a default selection

Regional notes for the western states

The scope and coordination are the same across markets. Logistics and code overlays differ:

Texas: Scale drives the challenge. A 250-unit DFW or Houston project can carry three to five sink models and hundreds of trim boxes, which makes phased delivery and inventory control the main task.
Washington: Seattle and Bellevue sites run tight on secure storage, and the state enforces water-efficiency limits at WaterSense levels. Phase deliveries and confirm flow ratings against state code.
Oregon: Portland’s Pearl District and South Waterfront sites need freight-elevator booking and street-use permits, and the value-add renovation market adds occupied-building delivery coordination with property management.
Colorado: Constrained Front Range sites and a state water-efficiency standard both apply. Altitude and low humidity also matter for acrylic shower pans, which contract more in cold, dry conditions. Let the building reach operational temperature before tile or surround goes in around the pan.

How Innergy Interiors handles Division 22

Innergy covers plumbing fixture supply for multifamily as part of a single interior finishes subcontract. We confirm trim kit compatibility against the plumbing sub’s valve submittals before ordering, transmit sink cutout templates before fabrication, confirm shower pans against the drain location, and phase delivery to the plumber’s trim-out sequence. On full-package projects, we coordinate hardware finish against Divisions 6 and 10 internally, so the coordination lives in our process instead of your superintendent’s checklist. To scope Division 22 as a standalone package or as part of a full seven-division multifamily finishes package, contact us and we respond within one business day.

Common questions

Who installs the plumbing fixtures, the supplier or the plumber? The licensed plumbing subcontractor installs them. The Division 22 fixture supplier procures, coordinates, delivers, and stages the fixtures and trim kits. The plumber sets the valves during rough plumbing and makes the final connections at trim-out.

Why do trim kits have to match the valve body? Trim kits are valve-specific. A trim kit from one manufacturer will not physically fit another manufacturer’s valve. Order trim before confirming the installed valve brand and model, and the hardware gets returned and reordered, which delays trim-out.

What water-efficiency rules apply to multifamily fixtures? Federal law caps lavatory faucets at 2.2 gpm, showerheads at 2.5 gpm, and toilets at 1.6 gpf. EPA WaterSense sets tighter limits of 1.5 gpm, 2.0 gpm, and 1.28 gpf. Colorado, Washington, and Oregon enforce state standards at or above WaterSense, so confirm the fixture against the state code before ordering.

When should sink cutout templates go to the countertop fabricator? Before fabrication begins. The sink model sets the cutout dimensions, and a slab cut to the wrong cutout usually needs refabrication, which adds about two weeks to countertop delivery.