Straight Pump Fitting – 1/2” Thread (Inline Threaded Connector for Pump)

This straight 1/2” threaded fitting (code 03822-6) serves to directly connect a pump to other threaded components in a boat’s plumbing system without changing the direction. In other words, it’s an “inline” adapter – one side screws into the pump, and the other side provides the same thread interface to continue the connection. It’s made of high-grade polypropylene or nylon that does not corrode, stands up to saltwater, and won’t cause galvanic issues with metal piping.

Details: The fitting features a 1/2” female thread on one side and a 1/2” male thread on the other. This makes it extremely versatile: it can be used as an extender, a transition piece, or simply a connector to align threaded joints. For example, if a pump has a male threaded outlet and needs to connect to a pipe with a female thread, this adapter acts as the intermediary.

Advantages & Uses:

• Aligning Threaded Connections: In some cases, a pump’s thread may not directly align with a pipe’s thread (for instance, the thread engagement depth might leave components oriented incorrectly). This fitting can be used as a short extension – it gives more play when screwing components together, so you can tighten them to the correct alignment.
• Reducing Vibrations: Although rigid, a plastic adapter can slightly dampen vibrations between metal parts. It also eliminates the need for an extra elbow – every unnecessary joint can introduce resonance. Fewer parts = less noise and vibration in the system.
• Universal Application: The standard 1/2” BSP threads mean this fitting can be used in various systems – for freshwater pumps, coolant loops, even some fuel systems (the plastic is resistant to many chemicals).
• Quick Repair: In the event of a cracked metal coupling or an issue with the original connector, this plastic coupler can serve as a temporary or permanent replacement for a metal nipple/fitting, ensuring the fluid flow is restored without leaks.

Installation: Screw the female end of the adapter onto the male thread of the pump (or another component), using sealant (e.g., Teflon tape). Then screw the mating female-threaded part (pipe, valve, etc.) onto the adapter’s male thread. Tighten with appropriate tools, but avoid excessive force on the plastic. After installation, test the connection under pressure – with proper sealing, there should be no leaks.

This straight threaded fitting is a valuable part of any marine plumber or DIY boater’s toolkit for creating simple and dependable connections. It contributes to the modularity of your system – allowing you to easily disconnect and swap out a pump or other components without cutting hoses or re-plumbing pipes.