Perko 0322 Thru-Hull Connection for Pipe, Cast Bronze, NPT/S

Overview

The Perko 0322 is a cast bronze thru-hull connection for use with pipe on boats that need a through-hull fitting built for below-waterline plumbing service. It is made for pipe-size installations rather than hose-only connections, with a plain bronze finish and a flange that is machined to sit against the hull.

The fitting range covered here includes 2 inch, 2-1/2 inch, and 3 inch pipe sizes, with mounting hole diameters from 2-3/8 inches to 3-1/2 inches depending on the variant. Maximum hull thickness ranges from 2-3/8 inches to 2-3/4 inches, so checking the hull laminate thickness and hole size before ordering is important.

The flange is grooved to help retain bedding compound during installation, and the neck is threaded to approximately 3/8 inch from the flange. This makes it a practical choice for raw water intakes, drains, and other pipe-connected thru-hull applications where bronze hardware and proper bedding are part of the installation plan.

Key features

• Cast bronze construction for pipe-connected thru-hull installations in marine plumbing systems.
• Flange is machined to fit the hull and grooved to help hold bedding compound during installation.
• Threaded neck runs to approximately 3/8 inch from the flange for secure pipe connection.
• Available for 2 inch, 2-1/2 inch, and 3 inch pipe sizes to match different onboard plumbing layouts.
• Variant-specific mounting hole and hull thickness dimensions help confirm fit before cutting or replacing an existing fitting.

Variants

This thru-hull connection is offered in three pipe-size configurations. Each version uses the same Perko 0322 thru-hull connection style for use with pipe, while the pipe size, required mounting hole diameter, and maximum hull thickness change by variant.

The dimensions below are the key fit points to compare against the vessel before installation. Pipe size should match the connected plumbing, while the mounting hole diameter and maximum hull thickness determine whether the fitting suits the hull opening and laminate thickness.

• 0322009PLB: 2 inch pipe size, 2-3/8 inch mounting hole diameter, and 2-3/8 inch maximum hull thickness. This is the smallest configuration in this range and is suited to installations built around 2 inch pipe.
• 0322010PLB: 2-1/2 inch pipe size, 2-7/8 inch mounting hole diameter, and 2-5/8 inch maximum hull thickness. This size fits larger pipe runs while keeping the required hull opening under 3 inches.
• 0322011PLB: 3 inch pipe size, 3-1/2 inch mounting hole diameter, and 2-3/4 inch maximum hull thickness. This is the largest configuration listed here and should be matched carefully to the hull opening and connected pipe.

Installation and fit

Before installation, confirm the pipe size, hull thickness, and finished hole diameter against the selected variant. The fitting should be bedded properly against a clean hull surface so the grooved flange can help keep bedding compound in place as the fitting is seated.

Because this is a through-hull component, final installation should follow accepted marine plumbing practice for the vessel and the application. On existing boats, it is also worth checking the condition of the surrounding hull laminate, backing arrangement, and connected pipework before replacing the fitting.

Use cases on board

This fitting is a good match for boat owners, yards, and refit crews working with pipe-connected bronze thru-hull plumbing. It suits installations where the priority is matching the existing pipe size and hull opening with a cast bronze thru-hull connection rather than changing the plumbing layout.

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.