OEM replacement seat and cover assembly for the Thetford Tecma Silence Plus toilet. White high-gloss plastic, sturdy metal hinges, UV-resistant. Easy to install and remove for cleaning. Previously known as Thetford part number T-278.
The Thetford 50000 is the OEM replacement seat and cover assembly for the Thetford Tecma Silence Plus toilet — Thetford's premium ceramic macerating toilet used in RV and marine applications. Previously known as Thetford part number T-278, this is the same direct-fit replacement under an updated part number.
The Tecma Silence Plus is one of Thetford's flagship ceramic RV/marine toilets, featuring an integrated macerating pump and quiet flush system. The seat and cover assembly is a frequently needed replacement over time from normal wear, cracking, or discoloration. The 50000 is constructed from high-gloss white plastic with metal hinges for long-term durability, and is UV-resistant to prevent yellowing with sun exposure. The seat detaches easily from the hinges for cleaning.
• 1x Seat assembly • 1x Cover assembly (lid) Bone color version: • T-278C — Same seat and cover in bone color Other Tecma Silence Plus parts: • Repair kits, valve assemblies, and seals available by Silence Plus model variant
The Thetford Tecma Silence Plus is a premium ceramic toilet with an integrated macerating pump — used in Class A motorhomes, luxury coaches, and marine vessels. The ceramic bowl provides a residential-quality feel and is easier to keep clean than polypropylene alternatives. The integrated macerator processes waste for discharge through a small-diameter hose, allowing flexible installation independent of tank location. The Silence Plus is available in multiple variants including the 2G (2nd Generation). Confirm your specific Silence Plus model when ordering replacement parts.
The 50000 (T-278) seat fits the Tecma Silence Plus specifically. Thetford makes several ceramic macerating toilet lines including the Tecma Flexi and Silence Plus 2G — confirm your toilet is the Silence Plus series before ordering, as seat assemblies are not always interchangeable between Tecma lines. Also note: the bone-colored Silence Plus models require the T-278C bone-colored seat assembly.