HAN-HNT15
$5.55 NZD
All prices include GST
Big Water Tanks is an official stockist of Hansen Products — New Zealand-made True Fit threaded fittings for plumbing, irrigation, rainwater, farm and marine water systems. The Hansen Nut & Hose Tail (HNT) gives a quick and easy connection for a variety of hoses to taps and pumps: a BSPT threaded nut on one end and a hose tail on the other, in 10 sizes from 15mm (1/2") to 80mm (3"), plus the Nut & Tail Elbow (HNTE) and spare Nut & Tail Washers (HNTW).
A nut and hose tail is a quick and easy way to connect a hose to a tap or pump. The threaded nut screws onto the male thread, so the fitting can be taken off without the hose needing to turn. Hansen describes it as "used for quick and easy connection for a variety of hoses to taps & pumps. BSPT x Hose." The joint is sealed with a Nut & Tail Washer (HNTW), which Hansen sells separately as a spare part. The Nut & Tail Elbow (HNTE) does the same job with a 90° bend. Hansen moulds them in New Zealand from glass fibre reinforced nylon, and they are part of the True Fit range tested to AS/NZS 4020:2018 for contact with drinking water. Below you will find Hansen's full dimension tables for every size we sell, the pressure and temperature ratings, how to pick the right size and washer, and installation tips straight from Hansen.
| Thread Size | Max @ 20°C | kPa @ 20°C | @ 40°C | @ 60°C |
|---|---|---|---|---|
| 6mm – 50mm (1/8" – 2") | 16 bar | 1,600 kPa | approx. 12 bar | approx. 8 bar |
| 65mm (2 1/2") | 12 bar | 1,200 kPa | approx. 9 bar | approx. 6 bar |
| 80mm – 100mm (3" – 4") | 10 bar | 1,000 kPa | approx. 7.5 bar | approx. 5 bar |
Ratings are by thread size. The 20°C figures are Hansen's published maximum working pressures. The 40°C and 60°C figures are read from Hansen's straight-line derating graph and are approximate. Ratings apply to fittings used with water only and installed to Hansen's specifications. Hansen tests its products for cold water use up to 60°C (140°F) and does not recommend use above 60°C.
Body & nuts: high quality glass fibre reinforced nylon (the AS/NZS 4020 test report lists the compound as Polyamide 6 Glass Fibre Reinforced — Durethan BKV 15F). Black, UV stabilised.
Rubber washer (HNTW): thermoplastic elastomer.
The Hansen EasyFit and True Fit range passed AS/NZS 4020:2018 testing (taste, appearance, growth of aquatic micro-organisms, cytotoxic activity, metals and organic compounds) at the Australian Water Quality Centre, report 356792, completed 7 March 2023.
The "Hansen True Fit" range of black plastic threaded fittings holds WRAS (Water Regulations Approval Scheme) approval number 251102715, valid 1 November 2025 to 30 November 2030. WRAS approval shows a fitting complies with the UK water fittings regulations for use on drinking water supplies.
| Stock | Sizes 15mm–50mm are stocked in store. We hold limited stock of other sizes, and can order them in if needed. |
| Delivery | Courier nationwide. Shipping is calculated at checkout based on your location. |
| Collections | Available from 21 Akatea Road, Glendene, Auckland. |
Hansen sizes are nominal BSP thread sizes, not the measured diameter of the thread or hose. A "15mm" nut is a 1/2" BSP thread.
The nut's BSPT thread (T) screws onto the male thread of your tap, pump or fitting. A 3/4" (20mm) tap thread takes a 20mm nut, e.g. HNT20.
Most sizes have a hose tail to match the nut. The reducing sizes put a smaller tail on a larger nut: HNT2015 (20mm nut, 15mm tail), HNT2515 (25mm nut, 15mm tail) and HNT2520 (25mm nut, 20mm tail). Use the hose tail size (d) and tail length (c) in the table below to check it suits your hose.
For a 90° bend at the tap, use the Nut & Tail Elbow (HNTE20 or HNTE25). Spare washers are sized by the nut: Hansen lists the 25mm washer (HNTW25) as the spare part for the 25mm × 15mm nut & hose tail, so match the washer to the nut size.
Hansen's Threaded Fitting Handy Tips: how to apply thread tape and tighten True Fit fittings.
Full step-by-step guide: Hansen threaded fitting installation guide.
Technical documents are published by Hansen Products (NZ) Ltd.
T is the BSPT thread in the nut. Dimensions are from Hansen's HNT drawing, in mm. AF = across flats. Choose the code from the Size drop-down above.
Reading the drawing:
| Hansen Code | Nut Thread (mm) | Nut Thread (in) | Hose Tail Size | a Nut AF (mm) | b Nut Height (mm) | c Tail Length (mm) | d Hose Tail (mm) | Max @ 20°C |
|---|---|---|---|---|---|---|---|---|
| HNT15 | 15mm | 1/2" | 15mm | 48 | 21 | 32 | 12.5 | 16 bar |
| HNT20 | 20mm | 3/4" | 20mm | 55 | 23 | 36 | 20 | 16 bar |
| HNT2015 | 20mm | 3/4" | 15mm | 55 | 23 | 32 | 12.5 | 16 bar |
| HNT25 | 25mm | 1" | 25mm | 64 | 25 | 41 | 25 | 16 bar |
| HNT2515 | 25mm | 1" | 15mm | 64 | 25 | 32 | 12.5 | 16 bar |
| HNT2520 | 25mm | 1" | 20mm | 64 | 25 | 37 | 20 | 16 bar |
| HNT32 | 32mm | 1 1/4" | 32mm | 76 | 27 | 47 | 32 | 16 bar |
| HNT40 | 40mm | 1 1/2" | 40mm | 82 | 30 | 55 | 40 | 16 bar |
| HNT50 | 50mm | 2" | 50mm | 97 | 33 | 60 | 50 | 16 bar |
| HNT80 | 80mm | 3" | 80mm | 125 | 33 | 82 | 76 | 10 bar |
The Nut & Tail Elbow turns the hose through 90° at the tap or pump. Dimensions are from Hansen's HNTE drawing, in mm. Both sizes take the matching Nut & Tail Washer (HNTW20 or HNTW25).
Reading the drawing:
| Hansen Code | Nut Thread (mm) | Nut Thread (in) | a Overall Length (mm) | b Nut AF (mm) | c Nut Height (mm) | d Overall Height (mm) | e Hose Tail (mm) |
|---|---|---|---|---|---|---|---|
| HNTE20 | 20mm | 3/4" | 82 | 55 | 17 | 49 | 20 |
| HNTE25 | 25mm | 1" | 96 | 64 | 22 | 63 | 25 |
Hansen describes the HNTW as "an accessory washer for the Nut & Tail fitting". Made from thermoplastic elastomer. Choose the washer that matches the nut size. Dimensions are from Hansen's HNTW drawing, in mm.
Reading the drawing:
| Hansen Code | Nut Size (mm) | Nut Size (in) | a Outside Diameter (mm) | b Inside Diameter (mm) | c Thickness (mm) | d Overall (mm) |
|---|---|---|---|---|---|---|
| HNTW15 | 15mm | 1/2" | 18.8 | 9 | 3 | 22 |
| HNTW20 | 20mm | 3/4" | 25 | 14.5 | 3 | 27.5 |
| HNTW25 | 25mm | 1" | 31 | 20 | 3 | 34 |
| HNTW32 | 32mm | 1 1/4" | 39.5 | 26 | 3 | 43 |
| HNTW40 | 40mm | 1 1/2" | 45 | 32 | 3 | 48 |
| HNTW50 | 50mm | 2" | 57.5 | 43.5 | 3 | 61 |
| HNTW80 | 80mm | 3" | 83 | 69 | 3 | 88 |
Using your fittings with anything other than water? For nut & tail fittings, Hansen refers to its Tank Fittings chemical resistance chart. Check it before you install. Pool and spa chlorine attacks the material.
View Chemical Resistance ChartStep-by-step thread sealing and tightening, do's and don'ts, and how to pressure test a new Hansen threaded joint, with Hansen's handy tips video.
View Installation GuideA 3/4" (20mm) thread takes a 20mm nut: the Hansen HNT20 has a 20mm hose tail and the HNT2015 has a 15mm hose tail. For a 90° bend, use the HNTE20 elbow. Hansen's drawing gives the HNT20 a 55mm nut across flats, a 36mm tail length and a 20mm hose tail (d).
A nut & hose tail has a threaded nut that screws onto a male thread such as a tap or pump outlet, sealed with a washer, so the hose does not need to turn. A Hansen Male Hose Tail (HHT) has a male thread that screws into a female thread.
Washers are sized by the nut. Hansen lists the matching Nut & Tail Washer as the spare part for each fitting, e.g. HNTW15 for the HNT15 and HNTW25 for the 25mm × 15mm HNT2515. The elbows take HNTW20 (HNTE20) or HNTW25 (HNTE25).
Yes. Hansen True Fit threaded fittings are made from a raw material approved for potable (drinkable) water. The range passed AS/NZS 4020:2018 testing for products in contact with drinking water (Australian Water Quality Centre report 356792, 2023), and the True Fit range holds UK WRAS approval number 251102715, valid to 30 November 2030. Hansen notes the material is suitable for domestic water, not pool or spa water.
Hansen says to use a thread sealant on all threaded connections and recommends Loctite 5331.
Hand tight plus one to two turns, and no more. Screw the fitting in by hand until it is firm, then use a spanner or pipe grip on the hex for one to two more turns. Hansen is clear on this: do not over-tighten. Hansen's handy tips video makes the same point: the aim is a good seal, not maximum tightness.
Hansen lists its True Fit threaded maximum working pressure chart for nut & tail fittings: at 20°C, 16 bar (1,600 kPa) for sizes from 6mm to 50mm and 10 bar (1,000 kPa) for 80mm to 100mm, so the HNT80 is 10 bar. Pressure ratings fall as temperature rises; at 60°C, Hansen's graph shows about 8 bar and 5 bar respectively. The ratings apply to water only, with the fitting installed to Hansen's specifications.
No. Hansen tests its products for cold water use up to a maximum of 60°C (140°F) and does not recommend use above 60°C, because plastic expands as temperature rises. Fittings that fail above 60°C are not covered by Hansen's Limited Lifetime Warranty — so do not use them on hot water lines that run above 60°C.
Yes. Hansen says True Fit fittings can be used with metal fittings. Use a plastic-compatible thread sealant, tighten to hand tight plus one to two turns, and make sure all pipework is properly supported so the nylon fitting is not carrying the weight of metal pipe or valves.
No. Hansen advises that the high chlorine concentrations in pool and spa water will attack the fitting material. True Fit fittings are only suitable for domestic water, and fittings used on pools or spas are not covered by Hansen's Limited Lifetime Warranty. Check the chemical resistance chart above before using them with anything other than water.
Hansen True Fit fittings are suitable for use above or below ground. However, Hansen does not recommend using any True Fit fittings under driveways, paths or foundations. All pipework must be adequately supported.
Yes. Hansen says all pipe work must be adequately supported.