Rainbow D4 Tank Latch

Rainbow D4 Tank Latch is a genuine Rainbow replacement part designed to secure the water pan on D-series Rainbow vacuums. Optimized for an exact fit, this OEM part carries the manufacturer part number R6178, ensuring reliable compatibility with Rainbow’s D3C, D4C, SE, and D3A models. This latch is the direct factory replacement for a secure, leak-free seal between the main housing and the water pan.

• Genuine Rainbow OEM part (MPN R6178) for D3C, D4C, SE and D3A Rainbow vacuums
• Replaces multiple old part numbers and provides a standard, durable water pan latch solution
• Color noted as black due to discontinued color-matching options; fits securely across Rainbow assemblies
• Simple installation uses the existing brass pin and spring from your old latch
• Note: This latch does not include the spring or pin (re-use from the old latch); consult your manual for replacement steps

Rainbow, a trusted name in premium vacuum solutions, backs this part with Rexair’s manufacturing expertise to keep your Rainbow system performing at its best. As a brand with a long heritage in household cleaning, Rainbow parts are designed for longevity, compatibility, and easy maintenance.

Upgrade your Rainbow with confidence—add the Rainbow D4 Tank Latch to your cart and keep your cleaning system operating like new.

Rainbow D4 Tank Latch