Thru-Hulls & Drains
Explore Thru-Hulls & Drains from trusted brands selected for dependable performance and practical value.
Marine Thru-Hulls & Drains for Boat Plumbing
Marine thru-hulls and drains provide secure passage points for water intake, discharge, cockpit drainage, and other onboard plumbing functions. CritPro carries durable hull fittings for recreational and commercial vessels as part of our complete Thru-Hulls, Seacocks & Strainers selection.
What to Look for in Thru-Hulls & Drains
Select fittings based on hull material, connection size, hose diameter, thread type, mounting angle, and whether the component is installed above or below the waterline. Marine-grade bronze, stainless steel, and composite materials provide dependable corrosion resistance.
What This Category Covers
This category includes bronze and stainless steel thru-hulls, hose-barb fittings, scoop thru-hulls, deck drains, cockpit drains, scuppers, hull strainers, clam-shell vents, and related drainage hardware.
Complete Your Hull Plumbing Installation
Pair your fittings with Seacocks & Ball Valves, protect water intakes with Raw Water Strainers, or explore our complete Marine Plumbing department.
Browse our complete selection of Marine Thru-Hulls & Drains at CritPro.