Plumbing Parts & Accessories

Keeping Your Marine & RV Plumbing System in Top Shape

Whether you're maintaining a liveaboard sailboat, a weekend cruiser, or a full-time RV, a properly functioning plumbing system isn't a luxury — it's a necessity. Plumbing parts and accessories cover the full spectrum of components that keep freshwater flowing in and wastewater managed safely: toilet repair kits, flush valves, bowl seals, water inlet assemblies, holding tank fittings, sanitation hoses, diverter valves, and more. When a seal fails or a valve wears out, having the right replacement part on hand means the difference between a quick fix and a trip-ending repair.

What Falls Under Plumbing Parts & Accessories?

This category spans a wide range of components built specifically for the unique demands of marine and RV environments — where space is tight, vibration is constant, and the consequences of a leak are far worse than they would be at home. Key items include:

• Toilet repair and service kits — flush ball seals, water valve assemblies, and waste ball kits that restore toilet function without full replacement
• Sanitation hoses and fittings — odor-resistant hose designed to handle waste lines in marine and RV applications
• Holding tank components — fittings, vent filters, and cassette tanks that keep waste systems compliant and contained
• Diverter and check valves — critical for routing water flow and preventing backflow in both freshwater and waste systems
• Water pump parts and strainers — components that protect pumps and ensure clean, steady freshwater delivery

Because marine and RV plumbing systems operate under conditions that differ dramatically from residential plumbing — saltwater exposure, freeze-thaw cycles, constant movement — it's important to use parts specifically engineered for these environments. Using generic hardware store components often leads to premature failure or poor fitment.

Top Brands in Plumbing Parts & Accessories

Dometic is one of the most recognized names in both marine and RV plumbing, with an extensive catalog of toilet parts and sanitation components spanning their popular SeaLand gravity, VacuFlush, and Masterflush product lines. Dometic offers genuine OEM replacement parts — including flush ball seal kits, water valve assemblies, and bowl components — that are engineered to fit their own systems precisely, making them a go-to source when restoring an existing Dometic installation.

Thetford has built its reputation over more than 50 years as a trusted name in marine and RV sanitation. Their wide range of plumbing parts supports popular toilet families like the Aqua-Magic V, Bravura, and Residence series, as well as their cassette toilet lineup. From water module assembly kits and waste ball drives to holding tank cassettes and seal lubricants, Thetford makes it practical to service your existing toilet rather than replace it outright.

Raritan Engineering has been a specialist in marine sanitation since 1958, and their plumbing parts reflect decades of purpose-built marine engineering. As the pioneer of the first marine macerating toilet, Raritan offers repair and service kits, overhaul parts, sanitation hose, valves, and strainers across their Elegance, SeaEra, PH II, and other toilet series. Their parts are manufactured to withstand the corrosive marine environment and are backed by a standard warranty with extended coverage options.

Tips for Shopping Plumbing Parts & Accessories

Before ordering, always identify your exact toilet or system model number — many seal kits, valve assemblies, and service kits are model-specific and will not interchange across series. Check the manufacturer's parts diagram if available, and note whether your system uses a gravity-flush, vacuum-flush, or macerating design, as each requires different components. Keeping a basic service kit on board or in your RV can save significant time and frustration when a part fails away from a supply source.