Shower Drain/Bilge Diaphragm Pump, 4.2 GPM
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You have 30 days to request a return. All sale items are final sale.
A compact, ignition-protected diaphragm pump for shower drain and bilge applications, built for filterless drainage and self-priming performance.
Key Features
- Robust, single diaphragm design for shower drain and bilge pumping applications
- Filterless design (no filter requirement) for straightforward installation
- Multi-position pump head and ports rotate for flexible routing and mounting
- Self-priming to 10 ft and designed to run dry
- Ignition protection compliance for marine use (meets ISO 8846 and USCG regulations)
Product Compatibility
- Boat shower drain systems
- Boat sink drain systems
- Shallow bilge pumping
- Remote bilge pumping (as part of a compatible discharge plumbing layout)
Product Details
- Product title: Shower Drain/Bilge Diaphragm Pump, 4.2 GPM
- Model/SKU: 6-508801000
- Flow rate: 4.2 GPM (4.2 US gallons/min; up to ~16 L/min open flow)
- Pump type: single diaphragm, filterless shower drain and bilge pump
- Installation: pump head and ports rotate for flexible installation
- Priming: self-priming to 10 ft
- Dry running: can run dry
- Ignition protection: meets ISO 8846 and USCG ignition protection regulations
- Variant barcode present on listing note: omit from customer-facing copy (listed in scientific notation)
Parts Desk Insights
Best Use Case: Ideal for marine shower drain and shallow bilge setups where you want a compact, filterless diaphragm pump with the flexibility of a multi-position head/ports for routing convenience.
Common Issues: For reliable performance, confirm discharge and inlet plumbing alignment with the chosen pump-head/port rotation position, and ensure the electrical circuit is protected appropriately. If flow is reduced, check for restrictions at the hose runs and mating connections, and verify the system is set up for correct priming.
Related Products & Accessories
- Browse Bilge Pumps - Explore matching bilge pump options and switching/circuit protection accessories.
- Browse Switches & Circuit Protection - Find compatible switch and circuit protection options for diaphragm pump installations.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.