The Multiquip 511221 6-Inch NPT Nipple is a genuine OEM fitting designed for MQ600TD80-TLRB, MQ600TD80-TLRP, MQ600H, MQ600HTB, and MQ600HTP trash pump models. This is a direct factory replacement sourced from Multiquip, ensuring the threading, material, and dimensions match exactly what was installed at the factory. Verified fitment across the MQ600 trash pump family means you can order with confidence and get your pump back in service without guesswork.
Key Features
- Genuine OEM Thread Integrity — Manufactured to Multiquip's original specification, so NPT thread pitch and sealing surface match the pump housing exactly, preventing leaks at the connection point.
- Drop-In Replacement Fitting — Threaded to the same 6-inch NPT standard as the original, allowing straightforward installation without reworking adjacent plumbing or discharge connections.
- Broad MQ600 Series Fitment — Compatible with MQ600TD80-TLRB, MQ600TD80-TLRP, MQ600H, MQ600HTB, and MQ600HTP trash pumps, covering both diesel and Honda-powered configurations in the MQ600 family.
- High-Volume Flow Integrity — A correctly fitted 6-inch nipple maintains full discharge capacity; a damaged or improperly sized nipple restricts flow and undermines pump output on high-demand dewatering applications.
- Leak-Free Fluid Path — Properly threaded NPT connections are critical on trash pumps handling abrasive slurry and debris-laden water; using the correct OEM fitting protects downstream connections and surrounding equipment from unintended discharge.
The 6-inch NPT nipple serves as the threaded connector between the pump's discharge port and the external plumbing or hose assembly. On high-volume trash pumps like the MQ600 series, this fitting carries the full discharge load of water, solids, and debris at operating pressure, making a secure, leak-free thread engagement essential. When this nipple becomes corroded, cross-threaded, or cracked, the pump loses discharge efficiency and poses a risk of uncontrolled fluid release at the connection point — making timely replacement with a correct OEM part the right call.
Part Details
| Part Number | 511221 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | 6-Inch NPT Nipple |
Compatibility & Fitment
| Name | Model |
|---|---|
| Trash Pumps | MQ600TD80-TLRB |
| Trash Pumps | MQ600TD80-TLRP |
| Trash Pumps | MQ600H |
| Trash Pumps | MQ600HTB |
| Trash Pumps | MQ600HTP |
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.
