The Dropout Auto Drain DOAD128 is a high-performance, float-operated solution designed to automatically discharge water, oil, and solid contaminants from your compressed air system. Engineered for reliability, the DOAD128 ensures your Dropout Filter remains at peak efficiency without the need for manual draining or electronic timers.
Key Features & Benefits
- Automatic Operation: Effectively removes liquid water and oil from Dropout units as they accumulate.
- No Power Required: The mechanical float-operated design means no batteries or mains electricity is needed, making it intrinsically safe.
- Maintenance-Free: Robust aluminium construction ensures long-term durability in harsh industrial environments.
- Large Discharge Capacity: Features a larger outlet than standard drains, preventing clogs from heavy sludge or particulates.
- Easy Installation: Dual 1/2" inlet connections provide flexibility for various mounting configurations.
Technical Specifications
| Part Number | DOAD128 (PDOAD128) |
| Inlet & Outlet Connections | 2 x 1/2" BSPT (Metal blanking plug included) |
| Drain Outlet | 1/8" BSPT |
| Operating Pressure | 1 - 16 Bar (15 - 232 psi) |
| Temperature Range | 0°C to 80°C |
| Weight | 0.4 kg |
Why Choose the DOAD128?
In many compressed air systems, manual drains are often forgotten, leading to water carryover that damages pneumatic tools and ruins paint finishes. The DOAD128 "Fit and Forget" system eliminates this risk. It is compatible with the entire range of Dropout Water Separators (DO60S to DO4000S) and is ideal for workshops, spray booths, and industrial manufacturing plants across New Zealand.
Installation & Maintenance
Installation is straightforward: remove the protective red caps, secure the metal blanking plug into the unused inlet port, and connect to the base of your Dropout filter. For safety, always depressurise the system before installation.

- Short Description:
DropOut Auto Drain DOAD128