All Rainbow vacuum systems use a water pan. That is what separates it from a traditional vacuum. From 1955 to current production there are only three different water pans.
If you want to upgrade to a larger 4 quart water pan, it again only a choice between three versions.
Original OEM factory 2 quart water pan that fits the model D4 SE (Special Edition), D4, and D3 Rainbow vacuum. Does NOT fit the model D2. This item replaces discontinued item numbers R2809 (D4), and R1556 (D3). Some versions may...
Online: $38.40 USD
Item #:R10236Your Rainbow is useless without the Water Basin (Pan). Here is a 2.5 quart original factory replacement for all e2 and E-2 (e SERIES™) model vacuums.Regular: $41.65 USD
Online: $35.30 USD
Item #:R2823This larger, four-quart Water Basin (Pan) for the D4 and D3 model Rainbow. Quickly tackle heavy-duty jobs while changing the water less often. The larger water pan has several benefits: Designed for heavy duty jobs when the...Price: $56.66 USD
Item #:R7895The larger water pan has several benefits. Fits models E2 Type 12 (e2 Silver, Gold), and E-2 (e SERIES™). It is designed for heavy duty jobs when the standard water pan gets thick with dirt very quickly. Once the water gets thick,...Regular: $54.59 USD
Online: $47.18 USD
Item #:R14325Factory original OEM four quart water pan. This water pan will only fit the R14002 dolly assembly that came standard with the model E2 Type 12 Black series. This WILL NOT FIT any other version so be sure your dolly has (5) casters to...Regular: $46.68 USD
Online: $39.36 USD
Item #:R601This standard 2-quart water basin fits the D2A, D2, and D model Rainbow. DOES NOT FIT any other model.Price: $77.53 USD
Item #:R10851BLHas your water basin for your RainMate become damaged? Purchase this factory replacement today. If you have damaged your RainMate water basin in the dishwasher or is discolored from use, then we have available a factory OEM...Regular: $23.73 USD
Online: $14.60 USD
Water Pan, RainMate (Clear)Item #:R10851CTIf you have damaged your RainMate water basin in the dishwasher or is discolored from use, then we have available an exact factory replacement. This version is a clear plastic and does not have a tint.Price: Discontinued