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HDPE Fused Reducing Coupler for Water Supply

The HDPE Fused Reducing Coupler for Water Supply is a high-performance transition fitting engineered for precision connections between different diameter HDPE pipes in potable water distribution systems.
Availability:
Quantity:

Specification(mm)

φD

C1

φD1

C2

L

φd

Packing quantity

63*50

80

50

50

45

125

4.8


75*50

95

55

50

45

145

4.8


75*63

95

55

63

50

155

4.8


90*63

115

65

63

50

155

4.8


90*75

115

65

75

55

160

4.8


110*63

140

75

63

50

160

4.8


110*75

140

75

75

55

165

4.8


110*90

140

75

90

65

170

4.8

160*90

200

75

90

65

230

4.8


160* 110

200

95

110

78

230

4.8


200* 110

250

105

110

115

295

4.8


200* 160

250

105

160

110

250

4.8


250* 160

300

120

160

135

275

4.8


250* 200

300

120

200

135

275

4.8


315* 200

370

140

200

310

4.8


315* 250

370

140

250

155

310

4.8


400* 250

470

155

250

155

340

4.8


400* 315

470

155

315

160

34

4.8



Product Overview


Manufactured from PE100 grade HDPE—the material of choice for pressurized water applications under EN 12201-1:2024—this coupler creates permanent, homogenous joints that eliminate leakage risks associated with mechanical fittings. Available in size combinations from 20mm×16mm up to 315mm×250mm, it provides a seamless flow transition between main lines and service connections, maintaining hydraulic efficiency in municipal, commercial, and industrial water networks. Its fusion-welded design ensures a service life exceeding 50 years, outperforming traditional metal reducers that suffer from corrosion and leakage over time.


Product Features


Homogenous Fusion Technology

The coupler is designed for electrofusion or butt fusion installation, creating molecular bonds between the fitting and pipes that are stronger than the pipe material itself. This eliminates potential leak paths found in threaded or gasketed fittings, reducing maintenance costs over the system’s lifetime. The fusion process is controlled via barcode-scanned parameters, ensuring consistent joint quality across installations .


Hydraulic Optimization

Featuring a gradual diameter transition with a 5° taper angle, the coupler minimizes pressure loss and turbulence, maintaining flow rates within 3% of straight pipe performance. The smooth inner surface (Ra <0.005mm) prevents scaling and bacterial growth, critical for maintaining water quality in potable systems. Computational fluid dynamics (CFD) analysis ensures optimal flow characteristics across all size combinations.


Pressure-Rated Performance

Certified for 16 bar (PN16) working pressure at 20°C, the coupler meets the demands of medium-pressure water supply systems. It retains pressure integrity at temperatures up to 40°C (common in warm climate water mains) and exhibits creep resistance under sustained pressure—maintaining 90% of its strength after 10,000 hours of continuous operation .


Applications


This fused reducing coupler excels in water supply transition scenarios:


Municipal Distribution: Connects large-diameter main lines to smaller service lines in urban water networks.

Industrial Facilities: Transitions between process water mains and equipment supply lines in manufacturing plants.

Commercial Complexes: Reduces pipe size from building main lines to floor distribution systems in hotels and shopping centers.

Water Treatment: Links filtration system outlets to distribution mains, maintaining pressure through diameter transitions .


FAQ


What makes fused joints better than mechanical connections?

Fused joints create a homogenous bond between fitting and pipe, eliminating leakage risks and providing better resistance to ground movement, temperature fluctuations, and pressure surges compared to mechanical couplings.


How is installation quality ensured?

Electrofusion models include barcode-encoded welding parameters that are scanned by fusion equipment, ensuring precise temperature and pressure control during installation. This minimizes human error and guarantees consistent joint quality.


Is it suitable for drinking water systems?

Yes. The PE100 HDPE material meets EN 12201-1 requirements for potable water contact, with no leaching of harmful substances and resistance to bacterial growth on inner surfaces.


What size combinations are available?

The coupler is available in standard size reductions including 20mm×16mm, 32mm×25mm, 63mm×50mm, 110mm×90mm, 200mm×160mm, and 315mm×250mm, covering most water supply transition needs. Custom sizes can be manufactured for specialized applications.


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Zhe Jiang Longye Pipes Industry Co., Ltd. is specilalized in producing PP-R pipes; pipe fittings, HD-PE water-supplying pipes, heatmelting socket pipe fittings, plastics connecting pipe fittings and water separators.
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