DiversiTech Cassette Drain Adaptor — 3/4″ × 1-1/4″ (Blue). Purpose-built for ceiling cassette A/C units, this adaptor connects the unit’s 1-1/4″ drain to standard 22 mm (3/4″) overflow pipe. Sold in a 3-pack so you’ve always got spares in the van — too easy.
Key features & trade benefits
- 3/4″ × 1-1/4″ sizing → matches common cassette drain outlets and 22 mm overflow pipe for a neat, leak-resistant hookup.
- Slip-fit + threaded design → quick push-on at the large end; thread onto 3/4″ line with a matching female fitting — faster installs, fewer returns.
- Durable PVC/ABS build → resists corrosion and cleaning chemicals; stands up to tight ceiling spaces and service knocks.
- 3-pack value → keep one for install, one for maintenance, one for emergencies — no waiting on parts.
- Colour-coded (Blue) → easy ID on site (medium size in the DiversiTech range).
Why this adaptor matters on real jobs
On a Friday arvo ceiling-tile job in Sydney, the cassette’s condensate outlet isn’t lining up with the 22 mm run. Pop in the blue 3/4″ × 1-1/4″ adaptor, thread to your line, and you’re back to site glassing and commissioning in minutes. She’ll be right — and no drips on the fit-out below.
Building out a drainage kit? Check our Condensate Pumps for pumps and accessories that pair nicely with these adaptors.
Pro tip
Always slope the run (≈20 mm per metre) and flush existing lines before you connect the adaptor. A quick wet-vac or pump-out saves call-backs from algae blockages — fair dinkum time saver.
Compatibility & system info
- Use with: Ceiling cassette A/C units (most OEMs) for gravity drain or via a condensate pump inlet.
- Connection: Slip-fit 1-1/4″ (to unit drain) × 3/4″ threaded male (to 22 mm line via female fitting).
- Material: PVC/ABS (chemically resistant; easy to service).
- Colour code: Blue = 3/4″ × 1-1/4″; other sizes available in Green and Black.
From humid Brisbane cafes to coastal installs, good drainage is everything — this adaptor keeps installs tidy and compliant with no dramas.
What’s included
- 3 × DiversiTech cassette drain adaptors — Blue 3/4″ × 1-1/4″.
Specifications
| Item | Cassette A/C drain adaptor (Blue) |
| Size | 3/4″ × 1-1/4″ |
| Pipe interface | Suits 22 mm (3/4″) overflow pipe |
| Material | PVC/ABS |
| Pack qty | 3 pieces |
| Colours in range | Green (3/4″ × 1″), Blue (3/4″ × 1-1/4″), Black (3/4″ × 1-1/2″) |
Specs & pack format per product listing and DiversiTech range overview.
Warranty & returns
Covered by HVAC Shop’s standard policy. If anything arrives damaged or not as described, we’ll sort it quick smart. See Shipping & Returns.
FAQs
Is this the right size for my cassette?
Blue = 3/4″ × 1-1/4″ (to 22 mm overflow). For other outlets, see the CDAMULTI multipack.
Can I use this with a condensate pump?
Yep — it suits gravity lines and pump inlets. If you need a compact, quiet unit, the WHISPA-Q MINI is a ripper match.
What about larger cassette outlets?
Use the Black adaptor (3/4″ × 1-1/2″) if the unit spigot is bigger. See the 1-1/2″ option.
Related products
- Want all three sizes in one go? — grab the CDAMULTI multipack to cover every cassette outlet in a day’s run.