Best sellers
Don't know the part number?
Find the exact part in your engine's exploded view by model or serial number.
All inboard parts →Questions? Ask us on WhatsAppBest sellers
Don't know the part number?
Find the exact part in your engine's exploded view by model or serial number.
Most searched families
Have the original part number?
Type it in the search box: every SLP part lists its Volvo, Renault and Scania equivalents. For trucks, buses and machinery.
All industrial vehicle parts →Questions? Ask us on WhatsAppMercury ranges
Most popular engines
Configure your engine
Choose range, power, controls and shaft and see the official price instantly.
See all Mercury engines →Questions? Ask us on WhatsAppCategories
Most popular
Can't find what you need?
Send us a photo or the part number on WhatsApp and we'll find it for you.
View all · Nautical Accessories →Questions? Ask us on WhatsAppCategories
More categories
- Engine Coolant
- Hull Repair
- Inflatable Boat Paint
- Outboard Motor Paint
- Adhesives
- Inline Fuel Filters
- Epoxy Products
- Marine Finishes & Enamels
- Engine Mounts
- Fuel Connectors
- Fuel Pumps and Valves
- Double Fuel Connectors
- Petrol Decanter Filters
- Petrol Decanter Spares
- Diesel Decanter Filters
- Diesel Decanter Spares
- Filter Fittings and Accessories
Can't find what you need?
Send us a photo or the part number on WhatsApp and we'll find it for you.
View all · Maintenance →Questions? Ask us on WhatsAppCategories
Most popular
Can't find what you need?
Send us a photo or the part number on WhatsApp and we'll find it for you.
View all · Electrical & Lighting →Questions? Ask us on WhatsAppCategories
More categories
Can't find what you need?
Send us a photo or the part number on WhatsApp and we'll find it for you.
View all · Marine Electronics →Questions? Ask us on WhatsAppCategories
More categories
Can't find what you need?
Send us a photo or the part number on WhatsApp and we'll find it for you.
View all · Cleaning & Maintenance →Questions? Ask us on WhatsAppCategories
Can't find what you need?
Send us a photo or the part number on WhatsApp and we'll find it for you.
View all · Marine Tools →Questions? Ask us on WhatsAppBest sellers
Need help choosing?
Tell us length, engine and use, and we'll recommend the right inflatable or RIB.
View all · RIBs →Questions? Ask us on WhatsAppSimple and fast returns management so you can shop with complete confidence.
Free shipping
On orders over €99
Technical Advice
Unsure about the replacement part? Contact us via WhatsApp and we'll verify the exact part for you.
100% Secure Payment
Transactions are protected with SSL and HTTPS encryption. Shop with complete peace of mind.
Thru Hull Scupper Brass 3/4" (Variant)
Description
Function and technical context
The 3/4" brass thru-hull is a hull accessory that allows the watertight passage of pipes through the hull of the boat, guaranteeing communication between the interior of the boat and the outside water without compromising the structural integrity or watertightness of the hull. Its application covers bilge systems, cockpit drains, bilge emptying and seawater intakes, being a critical element in any nautical hydraulic installation. The naval brass alloy provides excellent corrosion resistance in saline marine environments, combining mechanical robustness with compatibility with copper and bronze installations. A thru-hull in poor condition or incorrectly installed represents a direct risk of water entering the hull, with potentially serious consequences for the safety of the vessel.
When to replace this part?
The most common symptoms that indicate the need to replace a thru-hull are the appearance of humidity or dripping around the fitting, visible corrosion or verdigris in the area where it fits with the hull, difficulty in maneuvering the associated stopcock or microcracks in the body of the accessory detectable in the in-depth inspection. It is recommended to visually inspect all thru-hulls at each annual docking or at each seasonal maintenance, verifying the tightness, the state of the sealing and the absence of galvanic pitting. Preventively replacing any thru-hull that shows signs of degradation prevents flooding during navigation, a breakdown that can be unaffordable both in terms of cost and safety.
| Marca / Motor | Observaciones |
|---|---|
| No se dispone de datos de compatibilidad específicos para este producto. Consulte con nuestro equipo técnico para verificar la adecuación a su embarcación. | |









































































