Zurn commercial installation overview
Commercial toilet installation differs fundamentally from residential — requires building-grade water supply, commercial flushometer infrastructure, and (for wall-mount) wall carriers embedded during construction or significant retrofit.
Pre-install requirements by Zurn model
| Model | Pre-install requirement | Plumber required |
|---|---|---|
| Z5675 (floor-mount flushometer) | 1" supply line + flushometer wall stub-out at 16-18" above floor + 25 PSI minimum supply pressure | Commercial plumber |
| Z5615 (wall-mount flushometer) | Same as Z5675 + Z1203/Z1204 wall carrier embedded in wall + wall opening for carrier | Commercial plumber + construction |
| Z5685 (sensor-ready) | Same as Z5675 + 24V AC electrical (if hardwired sensor) OR battery service infrastructure | Commercial plumber + electrician (if AC) |
| Z5560 (light-commercial gravity tank) | Standard residential 1/2" supply line — same as any residential toilet | Plumber recommended, DIY-feasible |
Z5675 floor-mount install (commercial plumber, 90 min)
- Verify 1" supply line stubbing through wall at 16-18" above floor
- Verify floor flange at 12" rough-in
- Install wax ring on flange
- Set Z5675 bowl on flange (commercial plumber two-person lift, ~85 lbs)
- Hand-tighten flange bolts. Use level to verify plumb.
- Mount flushometer (Z6000 or compatible) on supply stub-out — typically 1.25" supply line connecting flushometer to bowl top spud
- Tighten flushometer connection to bowl top spud (1.5" connection)
- Restore water supply
- Test flush 5-10 cycles for proper operation
- Install commercial seat (Bemis 7300 or specified)
Z5615 wall-mount install (commercial plumber + construction, 3-5 hours)
- During building framing OR significant retrofit: install Z1203 or Z1204 wall carrier into wall structure, attached to floor joists/wall studs at specified load points
- Position carrier waste outlet to align with building drainline
- Complete wall finishing (tile, drywall) around carrier
- Position carrier supply line and flushometer mounting connection
- Mount Z5615 bowl to carrier (per carrier-specific instructions — typically 4 carrier bolts)
- Connect flushometer (Z6000) to carrier supply line and bowl rear spud
- Test cycle. Verify no carrier movement under load.
- Caulk around bowl-wall junction for finish.
Z5685 sensor-ready install (commercial plumber, 2 hours)
Same as Z5675 floor-mount install, plus:
- Mount Z6000-WS1 (battery) or Z6000-WS-AC (hardwired) sensor flushometer instead of Z6000 manual
- For hardwired AC: electrician runs 24V AC to flushometer location
- For battery: install 4 AA batteries during commissioning
- Calibrate sensor sensitivity per facility user-presence patterns
- Test sensor activation at typical user-departure positions
Z5560 light-commercial gravity tank install
Standard residential two-piece install procedure applies. Reference Sterling/Eljer/Vortens install guides for step-by-step. The Z5560 is the only Zurn commercial toilet a residential installer can install — flushometer models require commercial expertise.
Common Zurn commercial install mistakes
- Insufficient supply pressure (sub-25 PSI) — flushometer won't fully charge
- Supply line undersized (1/2" residential instead of 1" commercial) — restricts flush
- Flushometer wall stub-out at wrong height — accessibility code violation
- Sensor sensor too sensitive — false triggers from passing users
- Wall carrier load distribution mismatched to wall structure — long-term carrier failure