Perko Garboard Drain Plug, 1 in NPT, Cast Bronze Flange, Steel Wrench

Overview

The Perko 0124000PLB is a garboard drain plug with a cast bronze flange, a brass plug, and a 1/2 in x 1/2 in square zinc-plated steel wrench. It is sized for a 1 in NPT drain opening, with a 1 in threaded neck, a 3-1/8 in outside flange, and a mounting pattern that uses #10 screws.

This is the style of drain fitted on the outside surface of the hull for draining water when the boat is hauled or on the trailer. For a replacement job, the details that matter most are the 1 in NPT size, the 3-1/8 in flange diameter, and the four-screw mounting layout, because those are the measurements that determine whether it drops into an existing installation without extra rework.

Key features

• Cast bronze flange with brass plug
• 1 in NPT pipe size with 1 in threaded neck
• 3-1/8 in outside flange diameter for checking footprint against the existing drain location
• Outside-surface mount that uses four #10 screws
• 1/2 in x 1/2 in square zinc-plated steel wrench included for plug removal and installation
• Separate service plug allows draining without removing the flange from the hull

Compatibility and fit

Check three points before ordering: the boat needs a 1 in NPT garboard drain, room for a 3-1/8 in flange on the outside surface, and a four-hole pattern sized for #10 fasteners. On older hulls, matching the flange diameter and fastener layout can save time because it reduces the chance of redrilling or leaving old holes exposed.

This plug makes sense for owners replacing a worn bronze garboard drain on a trailer boat, skiff, runabout, or small cruiser that already uses this format. It also works well as a full replacement assembly when the existing plug or wrench is missing.

Installation and use

The included wrench engages the square recess in the plug, so routine draining and reinstallation are straightforward at haul-out, storage, or pre-launch service. In normal use, the flange stays fixed to the hull and the plug is the part you remove and reinstall as needed.

Before fitting a replacement, it is worth confirming the outside mounting surface is sound and that the existing opening matches the 1 in NPT thread size. That is usually the difference between a simple swap and a repair that turns into a larger hull job.

What's included

• Garboard drain plug assembly with cast bronze flange and brass plug
• 1/2 in x 1/2 in square zinc-plated steel wrench

Shipping
We ship worldwide from the United States. Rates are calculated at checkout based on destination and package weight. Some items include free shipping, which will show automatically. Not every product is eligible for international shipping; checkout will confirm eligibility. We do not ship to PO Boxes except through USPS, and not all packages qualify.

Processing and dispatch
Most orders are verified, packed, and handed to the carrier within 1 to 2 business days. Some products may need extra handling time or ship directly from the manufacturer. For certain international orders, inventory transfers between warehouses may add time. If any delay is expected, we will let you know the dispatch date.

Delivery and tracking
Deliveries are handled by trusted carriers such as USPS, UPS, FedEx, and DHL. Estimated arrival times appear at checkout and depend on your location and the service you choose. These are estimates and can be affected by customs or carrier disruptions. A shipping confirmation with a tracking link is emailed when your order ships, and tracking may take up to 24 hours to update. You can also view tracking in your account.

Duties, taxes, and support
International customers are responsible for any customs duties, taxes, and fees charged by the destination country. If these charges are refused and a shipment returns to us, the carrier’s return cost and any re-entry customs fees will be deducted from the refund. If your order is late or you need help, contact cs@qualityboatparts.com and we will assist you.

Quality Boat Parts is a reseller. Many items include a manufacturer’s warranty, and all warranty service is handled directly by the manufacturer. We do not manage or administer warranty claims on behalf of customers.

Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.

To start a claim, the customer must contact the manufacturer and follow their process. Keep your proof of purchase and original packaging, and register the product if the manufacturer requires it, as these are often needed for warranty service.

We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.