B&B RV Holding-Tank Fittings 94292–94296: Slip & Threaded

Wastewater holding tanks use several different outlet joints. A flush-slip opening, a flush-threaded connection and a projecting spigot may all be described with a similar nominal pipe size, but they require different mating fittings. B&B Molders' 94292–94296 catalog family shows the distinction.

Identify the fitting by connection style

What the different joint styles mean

Flush-slip — 94292

The 1 1/2-inch flush-slip fitting has a slip-type connection at the tank surface. Compare the old opening, joining method and pipe arrangement. The nominal size does not establish the exact diameter of a cutout through a particular tank wall.

Flush threaded — 94294

The 3-inch flush-threaded style uses a threaded mating connection rather than a smooth slip joint. Thread type and the matching component must be checked against the original tank installation; do not assume all 3-inch threaded wastewater fittings use the same thread form.

Projected slip or male spigot — 94295 and 94296

Both are 3-inch fittings with a projecting connection. The catalog distinguishes 94295 projected slip from 94296 projected male spigot. These descriptions identify the factory joint design, not automatic interchangeability with the threaded version.

Product photographs and exact links

94292 — 1½-inch flush-slip holding-tank fitting

View 94292 product

94294 — 3-inch flush-threaded tank fitting

View 94294 product

94295 — 3-inch projected-slip tank fitting

View 94295 product

94296 — 3-inch projected male-spigot fitting

View 94296 product

Before selecting a holding-tank repair fitting

1. Confirm the tank's material, original molded fitting and the manufacturer's approved service procedure.
2. Check whether the connection is flush or projected, smooth or threaded, and male or receiving.
3. Match nominal pipe size only after checking the full joining geometry.
4. Use installation materials and sealants approved for the actual tank and pipe material; verify a leak-free connection before returning the tank to service.

Factory fitting drawings

See the B&B Molders illustrated parts catalog (PDF), printed page 30, for the manufacturer's original part-number and component drawings. The PDF may open separately on mobile.

For downstream waste valves and hub or spigot connection choices, see the RV waste-valve connection guide. These are different product families, not a claim of interchangeability.