Ultra Drain Plus
UDP 100
High-capacity drainage for driveways, pool surrounds and large outdoor areas, with a strong, consistently extruded alloy top.
| Water flow | 570 L/min |
|---|---|
| Internal width | 120 mm |
| Overall width | 120 mm |
| Height | 102.5 mm |
| Channel length | 2 m |
| Discharge | Open end, in-built fall |
| Vehicle rating | 1,000 kg per tyre, max 25 km/h* |
| Grate top | Marine-grade anodised alloy, horizontal or honeycomb |
*When fully encased in concrete as per the installation guide. Not for heavy vehicles over 5 tonnes.
Accessories
- End outletEnd connection to stormwater
- Side outletSide connection to stormwater
- Bottom outletConnects to stormwater drainage
- Right angle cornerFor 90° channel connections
- End capCloses off the end of the channel
- JoinerConnects multiple channels
- Construction coverProtects the channel during the pour
Council & compliance
Level-entry thresholds & E2
The NZ Building Code's acceptable solution for a level-entry threshold drain is 150 mm deep and 200 mm wide. Ultra Drain channels are slimmer, but they can still be approved as an Alternative Solution under E2 External Moisture. The Code is performance-based, so council must assess the evidence you provide, not just the dimensions.
What to include with your application
- Fall rates for the surrounding surfaces that discharge to the channel
- Hydraulic calculations showing the drain's flow capacity
- Supporting documents, such as our threshold letter and a precedent council approval
Proven with Auckland Council
On a recent Auckland project, the originally specified threshold drain was replaced with an Ultra Drain UDP 100 through a Minor Variation Application, which council approved. Our download includes that approval (personal details removed) and an installed photo.
Guidance only. Approval sits with your Building Consent Authority; check with your architect, engineer or council early in the process.
Quick flow check
NIWA has recorded up to 123 mm of rain in one hour in NZ, about 2.05 L/min per m². Enter the area that drains to your threshold:
Rated flows from the 2026 Ultra Drain brochure. Use the outlet layout and falls in your calculation.
Size guide
Compare the range
| Spec | UDP 45 Tile Insert | UDP 45 | UDP 75 | UDP 100 | UDP 130 |
|---|---|---|---|---|---|
| Water flow | 150 L/min | 300 L/min | 400 L/min | 570 L/min | 700 L/min |
| Internal width | 101 mm | 101 mm | 75 mm | 120 mm | 130 mm |
| Overall width | 106 mm | 106 mm | 80 mm | 120 mm | 160 mm |
| Height | 45 mm | 45 mm | 105 mm | 102.5 mm | 115 mm |
| Vehicle rating | 1,000 kg per tyre | 1,000 kg per tyre | 1,000 kg per tyre | 1,000 kg per tyre | 1,000 kg per tyre |
| Lengths | 2 m | 2 m | 2 m | 2 m | 2 m |
Vehicle rating applies when the channel is fully encased in concrete as per the installation guide, at a maximum of 25 km/h. Not intended for heavy vehicles over 5 tonnes. All channels come in 2 m lengths. Not sure which size suits your site? Call 09 415 4588.
Trade pricing
Trade pricing available
Builders, landscapers, pool builders and plumbers: enquire direct for trade pricing on the full range.
Free samples
Try before you buy
Not sure which profile suits your project? Tell us where to send it and we'll post you a free sample.
- See and feel the marine-grade alloy top
- Check the profile fits your screed depth
- Posted free to your door, NZ-wide
Free NZ delivery · Free samples
Talk to a drainage expert
Tell us about your project and we'll help you pick the right channel, outlets and accessories.
- Phone 09 415 4588
- Email hello@ultradrain.co.nz
- Showroom
SSL Distributors showroom, 98 Hillside Road, Wairau Valley, Auckland 0630