Elkay Water Fountain Parts Diagram: 2026 Component Breakdown
An Elkay water fountain parts diagram details the plumbing loop, connecting the strainer drain assembly to a 1-1/4 inch tailpiece and P-trap. The electrical inlet feeds the cooling unit compressor, while the solenoid valve controls water flow to the bubbler head when activated by the front push button or sensor mechanism.
📌 Key Takeaways
- Standard Elkay drinking fountains utilize a 1-1/4 inch tailpiece connected to a standard waste P-trap.
- Solenoid valves operate on standard 115V power and act as the primary flow control mechanism.
- Always disconnect electrical supply and turn off shutoff valves prior to performing internal maintenance.
- Clogged strainer assemblies and scaled bubbler orifices account for over 60% of low flow issues.
- Simple cartridge replacements are suitable for DIY, but chiller compressor leaks require certified HVAC service.
Maintaining commercial drinking fountains requires an exact understanding of hydraulic schematics, internal plumbing pathways, and structural fasteners. Utilizing an official elkay water fountain parts diagram allows facility technicians and commercial plumbers to quickly isolate degraded solenoids, failed refrigeration loops, or clogged internal drain assemblies. Commercial Elkay units—such as the EZS, LLZS, and EFA series—integrate specialized mechanical and electrical systems within compact wall-mounted enclosures. This technical guide breaks down each internal section of the schematic, providing precise part identification, installation torque specifications, and methodical troubleshooting paths for institutional and commercial water delivery systems.
Elkay Water Fountain Parts Diagram: Structural and Drain Assembly Breakdown
According to OEM engineering specifications, modern Elkay cooler chassis are divided into three core subsystems: the structural housing/cooling engine, the electrical/metering control, and the gravity drain loop. When evaluating an elkay water fountain parts diagram, technicians must distinguish between high-pressure supply components (operating between 20 and 105 PSI) and atmospheric waste components.
Recommended Best Deal Products
The waste pathway begins at the 304 stainless steel basin strainer and flows through a molded EPDM rubber basin gasket into the main drain assembly. Directly beneath the basin, a threaded brass or high-density PVC tailpiece directs wastewater into the primary trap network. Mechanical stability and leak prevention rely on a compression slip joint containing a tapered friction washer and nylon nut. In complex institutional plumbing stacks—such as breakrooms where waste lines tie near a commercial garbage disposal line or common branch line—the drain path must interface with a properly pitched P-trap to maintain an airtight water barrier against sewer gas intrusion.
Where direct vertical venting is impractical inside wall chases, standard schematics mandate the addition of an Air Admittance Valve (AAV valve) downstream of the trap bend. This valve prevents siphoning of the trap seal during high-volume discharge cycles through adjacent vent pipe branches.
| Diagram Key ID | Component Description | Material / OEM Part # | Service Spec / Torque |
|---|---|---|---|
| 101 | Basin Strainer & Gasket Kit | 304 Stainless / EPDM (98724C) | Hand-tight + 1/4 turn (25 in-lbs) |
| 102 | Waste Drain Tailpiece | 1-1/4″ Schedule 40 PVC / Brass | Thread sealant required; 35 in-lbs |
| 103 | Slip Joint Nut & Friction Washer | Polypropylene / Molded Nitrile | Hand-tighten only; do not over-torque |
| 104 | Adjustable P-Trap Body | 1-1/2″ Standard PVC (75539C) | Maintain minimum 2″ water seal depth |
| 105 | Solenoid Water Control Valve | 115V AC / Brass Body (36218C) | Inlet pressure range: 20-105 PSI |
Commercial Elkay drinking fountains require a minimum static water inlet pressure of 20 PSI and a maximum of 105 PSI. Waste plumbing lines must utilize 1-1/4″ or 1-1/2″ Schedule 40 PVC or cast brass connections, sloped at a minimum pitch of 1/4″ per foot toward the vertical vent pipe riser.
Step-by-Step Service Protocol Using the Elkay Water Fountain Parts Diagram
Executing a full teardown or component replacement requires following the exact spatial relationships detailed on the elkay water fountain parts diagram. Deviating from the schematic sequence can result in pinhole cabinet leaks, continuous solenoid running, or localized drain overflows.
1. System Isolation and Panel Access
Disconnect the main 115V electrical supply to the unit. Shut off the upstream angle stop supplying the 1/4″ OD copper or polyethylene inlet line. Remove the lower wrap-around cabinet screws using a T20 Security Torx bit. Reference the panel fastener locations on your schematic to avoid damaging the internal condenser fins located behind the front louver panel.
2. Removing and Cleaning the P-Trap and Tailpiece
Position a catch bucket beneath the waste hub. Loosen the upper nut on the slip joint securing the waste basin tailpiece to the trap. Unthread the lower union nut on the P-trap elbow. Slide the trap body off the wall stub-out connection. Inspect the interior walls of the PVC pipe segments for calcification, organic biofilm, or mineral buildup. For systems installed alongside a commercial sink drainage guide layout, ensure no back-pressure is entering from shared waste stacks.
3. Inspecting Slip Joint Seals and Basin Drain Gaskets
Examine the tapered washer on the drain line. Replace hardened or deformed washers with genuine OEM EPDM seals. Unthread the lower drain assembly locknut from beneath the basin, push the strainer up through the top basin cutout, and clear old plumbers putty or silicone residual. Re-seat the strainer using non-staining plumbing sealant and torque the bottom locknut according to manufacturer specifications.
4. Verifying Vent Pipe Alignment and AAV Valve Functionality
Inspect the secondary air loop indicated on the schematic. If your installation incorporates an inline AAV valve instead of a direct-to-wall vent pipe connection, test the internal silicone diaphragm by applying light vacuum pressure. If the valve fails to seal under positive backpressure, replace the assembly immediately to prevent sewer gas escape into the fountain cabinet.
When retrofitting older Elkay wall-hung units with modern hands-free sensors or integrated bottle fillers, verify that your retrofitted plumbing line adheres to bottle filler retrofitting protocols to maintain compliance with ADA fountain projection heights and waste outlet centerlines.
Troubleshooting Fluid Dynamics and Drainage via the Elkay Diagram
Symptom isolation on commercial water coolers requires cross-referencing hydraulic symptoms against the mechanical pathways identified in the elkay water fountain parts diagram.
Always isolate incoming 115V AC power before touching or servicing the water solenoid, relay, or compressor terminals inside the lower unit shroud. Water leaks occurring directly above live electrical junctions create a severe shock hazard.
Resolving Slow Basin Drainage and Standing Water
If water collects in the stainless steel basin during operation, consult the waste path section of the elkay water fountain parts diagram. The primary causes are restriction within the basin strainer mesh, a clogged P-trap dip bend, or insufficient atmospheric venting downstream. Disassemble the slip joint fitting and run a manual drum auger through the waste stub-out into the main branch line. For complete diagnostics on chilling unit performance alongside flow issues, consult our commercial water chiller calibration guide.
Eliminating Cabinet Leaks at Tailpiece and Slip Joint Unions
Fluid pooling at the floor base typically stems from a loose tailpiece connection or misaligned plastic PVC threads. Ensure the tailpiece enters the drain assembly perfectly perpendicular. Off-axis thread engagement damages plastic union threads, preventing the tapered washer from sealing uniformly around the perimeter of the waste pipe.
Preventing Sewer Gas Bypass from the Vent Pipe and AAV Valve
If foul odors emerge from the cooler enclosure, check the trap seal depth. Infrequently used fountains experience trap seal evaporation. Additionally, if the unit shares a wall chase with a high-volume fixture or a commercial garbage disposal, severe hydraulic pressure fluctuations can pull the water seal out of the P-trap unless a working AAV valve or dedicated vertical vent pipe is functioning correctly.
Elkay Water Fountain Plumbing and Schematic FAQs
What size plumbing fittings are standard on an Elkay water fountain drain assembly?
Commercial Elkay water fountains standardly feature a 1-1/4″ outer diameter (OD) waste tailpiece connection. This adapts to a standard 1-1/4″ or 1-1/2″ Schedule 40 PVC or brass P-trap via a standard compression slip joint nut and washer.
Why does the Elkay water fountain schematic specify an Air Admittance Valve (AAV valve)?
An AAV valve is specified in wall-hung installations where connecting directly to a conventional through-roof stack vent is structurally unfeasible. The valve opens under negative pressure to admit air into the drain pipe, equalizing pressure and preserving the water barrier in the P-trap without releasing sewer gas.
Can a commercial Elkay fountain drain line connect into a garbage disposal waste stack?
While physically possible using branch tailpieces, direct connection to a garbage disposal line is generally discouraged under uniform plumbing codes (UPC). Disposal discharge can force food particulate and contaminated water back up the fountain tailpiece, fouling the basin drain assembly. If connected to a shared waste stack, backflow preventers and proper trap isolation must be installed in accordance with backflow preventer installation standards.
How do you address leaks around the lower tailpiece slip joint connection?
First, isolate incoming power and water. Loosen the slip joint union nut, slide back the friction ring, and inspect the tapered sealing washer for flat spots, cracks, or debris. Re-align the tailpiece straight into the P-trap receiver, replace the washer if degraded, and hand-tighten the nut firmly plus an additional 1/4-turn with channel locks.
What is the recommended replacement schedule for internal filters and mechanical drain washers?
Elkay recommends replacing internal water filter cartridges (e.g., WaterSentry VII) every 3,000 gallons or 12 months, whichever comes first. Synthetic rubber slip joint washers, EPDM drain gaskets, and mechanical solenoid diaphragms should be visually inspected annually during routine maintenance and replaced every 24 to 36 months to maintain optimum system reliability.
