Blue Diamond C21-014 MultiTank™
Blue Diamond C21-014 MultiTank™
Blue Diamond C21-014 MultiTank™ — Multi-Line Condensate Collection Tank
The Blue Diamond MultiTank™ is a flexible multi-line condensate collection tank specifically engineered for seamless integration with BlueDiamond® MaxiBlue® and MegaBlue® condensate pumps. Designed to consolidate up to six independent condensate drainage lines into a single collection point, it simplifies complex HVAC installations — particularly well-suited for ceiling-mounted units or remote locations where space is at a premium.
Using thermistor sensing technology rather than traditional float switches, the MultiTank™ has no moving parts to clog, stick, or seize — delivering reliable, low-maintenance performance in demanding environments. Backed by a 3-year warranty.
Key Features
- Up to 6 condensate drain lines — consolidates multiple lines into a single collection point
- Thermistor sensing — no moving parts, no float switches to clog or stick
- Ultra-quiet: 23 dB(A) — suitable for noise-sensitive environments
- 1.5 litre tank capacity — handles systems up to 50kW total
- DIN plug connection — compatible with MaxiBlue and MegaBlue pumps
- Inlet sizes: 20, 25, 27mm — flexible connection to multiple drain line diameters
- 8mm straight outlet
- 0.5m alarm lead
- Lightweight at 600g — easy to handle and position during installation
- 3-year manufacturer warranty
Applications
- Mini-split systems up to 3.5kW per unit (up to 50kW total system)
- Multi-split and VRF/VRV systems with multiple indoor units
- Ceiling-mounted cassette units and concealed installations
- Offices, libraries, and areas where sound suppression is a priority
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | C21-014 |
| Brand | Blue Diamond / Charles Austen Pumps |
| Dimensions | 355 × 126 × 115mm |
| Weight | 600g |
| Tank Capacity | 1.5 litres (0.4 gallon) |
| Inlet Size | 20, 25, 27mm |
| Outlet | 8mm straight |
| Alarm Lead | 0.5m |
| Connection | DIN plug |
| Sensing Technology | Thermistor (no moving parts) |
| Noise Level | 23 dB(A) |
| Compatible Pumps | MaxiBlue, MegaBlue |
| Max Condensate Lines | 6 |
| Max System Capacity | 50kW |
| Warranty | 3 years |
What's Included
- 1 × Blue Diamond C21-014 MultiTank™
Frequently Asked Questions
Which pumps is the MultiTank compatible with?
The MultiTank™ is compatible with the Blue Diamond MaxiBlue® and MegaBlue® condensate pumps. It connects via DIN plug and is not compatible with MiniBlue models.
How many condensate lines can the MultiTank handle?
The MultiTank™ can consolidate up to six independent condensate drain lines into a single collection point, supporting systems up to 50kW total capacity.
Does the MultiTank use a float switch?
No — the MultiTank™ uses thermistor sensing technology, which monitors temperature inside the tank rather than relying on a float switch. This eliminates the risk of clogging or sticking and ensures consistent, reliable performance.
What inlet sizes does the MultiTank accept?
The MultiTank™ accepts inlet sizes of 20mm, 25mm, and 27mm, providing flexibility for connection to different drain line diameters.
What is the warranty?
The Blue Diamond MultiTank™ is backed by a 3-year manufacturer warranty.