Perko 0805 Seacock Body, Ball Valve Design, Cast Bronze

Overview

The Perko 0805 Seacock Body is a cast bronze ball valve seacock body for below-waterline thru-hull installations on boats. It is made for applications that use extra long, scoop, or flush type thru-hulls, giving the installer a valve body that can be matched to the pipe size and flange footprint needed for the hull opening.

This series covers common marine plumbing sizes from 3/4 inch through 3 inches. Across the range, flange diameters run from 3-1/4 inches to 8 inches, and overall heights run from 3-3/8 inches to 7-3/4 inches, so the right size can be matched to the thru-hull, hose routing, and available space near the hull.

Key features

• Cast bronze construction for use in marine thru-hull and seacock installations.
• Ball valve design for straightforward open and closed flow control at the hull fitting.
• Made for extra long, scoop, or flush type thru-hulls where the seacock body needs to match the style of the underwater fitting.
• Available in pipe sizes from 3/4 inch to 3 inches to suit a range of intake and discharge plumbing layouts.
• Marine UL Listed as a 595E sea valve for applications that require a listed seacock body.
• Overall height is measured from the top of the hose adapter to the bottom of the flange, which helps when checking clearance in bilge, engine room, and locker spaces.

Variants

This Perko seacock body range varies by pipe size, flange diameter, and overall height. The smaller sizes suit tighter plumbing runs and lower flow lines, while the larger sizes provide the footprint and height needed for bigger thru-hull connections.

The product type, cast bronze construction, ball valve format, and intended use with extra long, scoop, or flush type thru-hulls remain consistent across the range. Check the pipe size first, then confirm the flange diameter and overall height against the space available around the hull fitting before installation.

Installation and fit

For a proper fit, the pipe size must match the thru-hull and connected plumbing. The flange diameter also matters because it affects the mounting footprint at the hull, and the overall height matters in compact areas where hoses, clamps, stringers, engine beds, or liners can limit access.

This type of seacock body is commonly used where a positive shutoff is needed at the hull, such as raw water intake, livewell, washdown, drain, or other onboard water handling systems that use compatible thru-hull hardware. Final installation should follow marine plumbing practices for below-waterline fittings, including sound backing, correct bedding, secure hose attachment, and access for regular operation.

Use on board

This seacock body is a practical match for boat owners, service yards, and refit projects replacing or building out bronze thru-hull plumbing. It is especially useful where the installation calls for a seacock body that works with extra long, scoop, or flush type thru-hulls rather than a generic inline valve.

Because seacocks are safety-critical fittings, the installed valve should remain reachable, easy to operate, and inspected as part of normal vessel maintenance. Moving the handle periodically and checking the surrounding hose, clamps, bedding, and fasteners helps keep the thru-hull system ready for regular use.