RAMPTECH® 4" Lavatory Drain Coupling

Sage Part Number: 383025REV1
SKU: SPP00529122
Call for Price.

Designed to make a superior connection. 

Engineered for speed, ease and reliable use, RAMPTECH® Lavatory Drain Couplings are connected and locked via a quarter-turn onto any standard lavatory drain nipple at the service panel – enabling waste to be drained into a lavatory service vehicle during preflight servicing. These couplings provide a positive leak-proof connection on all standard 4 inch drain valves, eliminating ramp spills and waste contact with personnel.

Lightweight and easy to handle RAMPTECH® Lavatory Drain Couplings feature a bright, high visibility yellow collar. What’s more, these couplings are constructed of extra durable impact-resistant, non-porous composite material to withstand the most demanding high volume use. Top quality features also include a stainless steel cam ring as well as a stainless steel retaining washer and snap ring to resist corrosion and add even more long-lasting performance.


  • Durable, impact-resistant, non-porous composite material
  • Utilizes a stainless steel cam ring, retaining washer, and snap ring for added corrosion resistance and durability
  • Distinctive yellow colored collar for high visibility
  • Positive leak-proof connection on all standard 4 inch drain valves
  • Helps to eliminate ramp spillage and waste contact with servicing personnel
  • Lightweight for easy handling and operation
  • Hose bib connection for all standard 4 inch lavatory service hoses: Part Number: 383331
  • Stainless steel outlet nipple adapter for quick-change operation: Part Number: 383333


Rockwell Collins OEM part number 2653-21-1



Products specifications
Application LAV DRAIN
Hose Size 4 INCH
Connection Type HOSE BARB
Construction COMPOSITE
Includes Plug NO
Includes Cap NO
Includes Lanyard NO
Cushion NO