The Multiquip 13379 is a genuine OEM Copper Washer designed for Essick concrete and mortar mixer models including EM120SM, EM12M Series, and EM900SD. As a factory-sourced component, it meets the exact material and dimensional tolerances specified for these machines, ensuring a proper seal and correct clamping load at the fastened joint. Sourced directly through Multiquip's OEM parts program, the 13379 is the correct replacement when your original washer shows signs of deformation, corrosion, or fluid seepage.
Key Features
- Annealed Copper Construction — Copper's natural malleability allows the washer to conform and compress against mating surfaces, creating a reliable fluid-tight seal under torque.
- Genuine OEM Sourcing — Manufactured to Multiquip's original material specification, so wall thickness, inner diameter, and outer diameter match the factory fastener and port geometry exactly.
- Direct Drop-In Installation — Seats onto the original fastener or fitting without reworking the surrounding hardware, keeping service time short.
- Confirmed Fitment — Verified for Essick mixer models EM120SM, EM12M Series, and EM900SD; cross-reference part number 13379 before ordering to confirm your application.
- Prevents Fluid Seepage — A properly seated copper washer stops oil or fluid leaks at threaded connections, protecting internal mixer components from contamination and loss of lubrication.
A copper washer is a soft-metal sealing element placed beneath a bolt head, plug, or fitting to create a leak-free joint at fluid-carrying connections. When torque is applied, the copper deforms slightly to fill microscopic surface irregularities between the fastener and the mating surface, blocking the path for oil or other fluids to escape. When a copper washer becomes crushed, cracked, or corroded, the seal breaks down and fluid seepage follows — which, left unaddressed, can lead to low oil levels, contamination, and accelerated wear on the mixer's internal components.
For questions about fitment or to confirm this is the correct part for your Essick mixer, contact the DHS Equipment team directly.
Part Details
| Part Number | 13379 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Copper Washer |
Compatibility & Fitment
| Name | Model |
|---|---|
| Essick Mixers | EM120SM |
| Essick Mixers | EM12M Series |
| Essick Mixers | EM900SD |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
