The Multiquip EM509510 Spring is a genuine OEM component designed for ST-45HRM and ST-70 submersible pump models. As a direct OEM replacement, this spring is sourced from Multiquip to match the original specification of your equipment exactly. Confirmed fitment for ST-45HRM and ST-70 units means you can order with confidence knowing this is the correct part for your machine. DHS Equipment stocks genuine Multiquip parts to keep your pump running as intended.
Key Features
- Genuine OEM Tensioning Integrity — Manufactured to the original spring rate and material grade specified for these submersible pump assemblies, ensuring correct compression and return force throughout the component's service life.
- Drop-In Replacement — Engineered to seat and retain exactly as the factory-installed spring, with correct coil diameter and free length for straightforward installation without rework.
- Confirmed Fitment — Verified for Multiquip ST-45HRM and ST-70 submersible pump models; reference part number EM509510 when ordering to confirm compatibility.
- Sustained Pump Mechanism Performance — A correctly rated spring maintains the tension and return action needed to keep internal pump components operating within their designed range, preventing premature wear on mating parts.
- Long-Term Corrosion Resistance — Produced to withstand the wet, submersed operating environment typical of submersible pump applications, resisting degradation that can cause spring fatigue or failure.
A spring within a submersible pump assembly provides the tension or return force needed to hold, seat, or reset a moving internal component — such as a valve, switch actuator, or mechanical linkage — during pump operation. When a spring weakens, deforms, or breaks, the component it controls may fail to seat properly or return to its resting position, leading to reduced pump efficiency, internal leakage, or complete loss of function. Replacing a worn spring with the correct OEM part restores the precise force balance the pump was designed to operate with.
Need help confirming this is the right part for your equipment? Contact the DHS Equipment parts team with your model and serial number for assistance.
Part Details
| Part Number | EM509510 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Spring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Submersible Pumps | ST-45HRM |
| Submersible Pumps | ST-70 |
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.
