The Multiquip 3SXB17090 is a genuine OEM NPT Plug and O-Ring 1/2 designed for MQD2HA and MQD3HA diaphragm pumps. As a direct OEM replacement, this hardware ensures a leak-free seal at the 1/2-inch NPT port with no guesswork on fitment or thread compatibility. Sourced directly from Multiquip, this plug and o-ring set meets the same specifications as the original components installed at the factory. Confirmed compatible with MQD2HA and MQD3HA diaphragm pump models.
Key Features
- Genuine OEM Seal Integrity — Manufactured to the exact material grade and thread specification required for 1/2-inch NPT ports on Multiquip diaphragm pumps, ensuring a pressure-rated, leak-free connection.
- Drop-In Thread Compatibility — Cut to the 1/2-inch NPT standard, this plug threads directly into the designated port without chasing or recutting threads.
- Confirmed Diaphragm Pump Fitment — Verified for use on MQD2HA and MQD3HA models; always cross-reference part number 3SXB17090 before ordering.
- Prevents Fluid Loss at Port Locations — A failed or missing plug allows fluid bypass and pressure loss that can starve the pump of prime and interrupt flow; this replacement restores full port sealing immediately.
- Fuel and Fluid System Safety — Correct sealing hardware at NPT ports prevents uncontrolled fluid weeping on operating equipment, reducing the risk of spills near pump intake and discharge lines.
An NPT plug is a threaded fastener used to close off unused or service ports in a pump's fluid system, while the paired o-ring provides a secondary compression seal that prevents fluid from weeping past the plug threads under pressure. On diaphragm pumps like the MQD2HA and MQD3HA, maintaining tight port seals is critical to sustaining prime and consistent discharge pressure. When the o-ring deteriorates or the plug is damaged, even a minor leak at the port can cause pressure drop, loss of prime, and reduced pumping output.
Part Details
| Part Number | 3SXB17090 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | NPT Plug and O-Ring 1/2 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diaphragm Pumps | MQD2HA |
| Diaphragm Pumps | MQD3HA |
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.
