CPVC Reducer Coupler

A CPVC Reducer Coupler is a type of pipe fitting made from Chlorinated Polyvinyl Chloride (CPVC) that is used to connect two CPVC pipes of different diameters in a piping system. It helps reduce the pipe size from a larger diameter to a smaller diameter while maintaining a secure and leak-proof connection. CPVC Reducer Couplers are commonly used in hot and cold water distribution systems, chemical processing lines, and industrial piping systems because CPVC material provides excellent resistance to heat, corrosion, and chemicals. They are usually installed using solvent cement joining, which creates a strong and permanent bond between the pipes and the fitting.

The CPVC reducer coupler is available for a variety of pipe types, including copper and CPVC, as well as various pipe sizes and configurations. Depending on the application, these fittings may be screw-on, compression, or adhesive attachment types. A reduction coupling is used to connect tubes or pipes of different diameters. These specialised pipe joining fittings are designed to simplify coupling to a wide range of pipe sizes while maintaining the integrity of the pipe circuit.

CPVC Reducer Coupler Details

Size (Inch)	ID-1 (mm)	OD-1 (mm)	WT-1 (mm)	SL-1 (mm)	ID-2 (mm)	OD-2 (mm)	WT-2 (mm)	SL-2 (mm)	H (mm)
¾ x ½	26.97	34.79	3.91	25.40	21.64	29.10	3.73	22.23	56
1 x ½	33.78	42.88	4.55	28.58	21.64	29.10	3.73	22.23	66
1 x ¾	33.78	42.88	4.55	28.58	26.97	34.79	3.91	25.40	65
1¼ x ½	42.55	52.25	4.85	31.75	21.64	29.10	3.73	22.23	69
1¼ x ¾	42.55	52.25	4.85	31.75	26.97	34.79	3.91	25.40	68
1¼ x 1	42.55	52.25	4.85	31.75	33.78	42.88	4.55	28.58	68
1½ x ½	48.72	58.88	5.08	34.93	21.64	29.10	3.73	22.23	74
1½ x ¾	48.72	58.88	5.08	34.93	26.97	34.79	3.91	25.40	76
1½ x 1	48.72	58.88	5.08	34.93	33.78	42.88	4.55	28.58	75
1½ x 1¼	48.72	58.88	5.08	34.93	42.55	52.25	4.85	31.75	74
2 x ½	60.78	71.86	5.54	38.10	21.64	29.10	3.73	22.23	85
2 x ¾	60.78	71.86	5.54	38.10	26.97	34.43	3.73	25.40	85
2 x 1	60.78	71.86	5.54	38.10	33.78	42.88	4.55	28.58	85
2 x 1¼	60.78	71.86	5.54	38.10	42.55	52.25	4.85	31.75	83
2 x 1½	60.78	71.86	5.54	38.10	48.72	58.88	5.08	34.93	83
2½ x 2	73.56	87.58	7.01	44.45	60.78	71.86	5.54	38.10	104
3 x 2	89.31	105.55	16.24	48.63	60.78	88.54	27.76	48.93	104
3 x 2½	89.51	104.75	7.62	47.63	—	—	—	—	—

Property	Details
Product Type	Reducer Bushing (Reducing fitting)
Function	Connects pipes of different diameters (reduces size)
Material	CPVC (Chlorinated Polyvinyl Chloride)
Design	Spigot × Socket / Spigot × Female Thread (FNPT)
Connection Type	Solvent weld / Threaded
Size Range	½” × ¼” up to 4” × 3”
Schedule	SCH 40 / SCH 80
Pressure Rating	Up to ~235 psi (≈16 bar) at 23°C
Temperature Range	0°C to 93°C (≈200°F max)
Standards	ASTM F439, ASTM D2846
Color	Grey / off-white
Manufacturing Process	Injection molded
Applications	Chemical piping, water supply systems
Density	~1.50 – 1.60 g/cm³
Tensile Strength	~50 – 60 MPa
Flexural Strength	~90 – 110 MPa
Modulus of Elasticity	~2400 – 3000 MPa
Impact Strength	Moderate to high
Hardness	~80–85 Shore D
Water Absorption	≤ 0.04%
Heat Deflection Temp	~90–105°C
Thermal Conductivity	Low (good insulation)
Weight	Lightweight (e.g., ~0.02–0.13 kg depending on size)

Size Reduction Capability
Designed to connect two CPVC pipes of different diameters, allowing a smooth pipe size transition.
High Temperature Resistance
Can withstand temperatures up to 93°C (200°F), making it suitable for hot water systems.
Excellent Corrosion Resistance
CPVC material is non-corrosive and does not rust like metal fittings.
Chemical Resistance
Resistant to many acids, salts, and alkalis, making it suitable for industrial and chemical piping.
Lightweight Construction
Much lighter than metal fittings, which makes handling and installation easier.
Leak-Proof Jointing
Uses solvent cement welding to create a strong and leak-free connection.
Smooth Internal Surface
The smooth inner wall helps reduce friction and pressure loss and improves flow efficiency.
Durable and Long Service Life
Strong material that provides long-term performance in industrial systems.
Low Maintenance Requirement
Resistant to scaling, corrosion, and chemical damage, reducing maintenance needs.
Compatibility with Standard CPVC Pipes
Compatible with CPVC Schedule 40 and Schedule 80 piping systems.

Nominal Size (Inch)	Pressure Rating at 23°C (73°F)	Pressure Rating at 60°C (140°F)	Pressure Rating at 93°C (200°F)
½” – ¾”	400 psi	210 psi	100 psi
1″ – 1¼”	370 psi	190 psi	90 psi
1½” – 2″	330 psi	170 psi	80 psi
2½” – 3″	300 psi	150 psi	70 psi
4″	280 psi	140 psi	65 psi

If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.

Benefits of Using CPVC Reducer Coupler

Size Transition

Allows smooth connection between pipes of different diameters, making it easy to reduce pipe size in a piping system.

Corrosion Resistance

CPVC material does not rust or corrode, ensuring long service life even in harsh environments.

High Temperature Resistance

Suitable for hot and cold water applications, handling temperatures up to about 93°C (200°F).

Chemical Resistance

Highly resistant to many acids, alkalis, and salts, making it suitable for chemical and industrial piping systems.

Leak-Proof Joints

When installed with CPVC solvent cement, it forms a strong and permanent leak-free connection.

Lightweight and Easy Installation

CPVC fittings are lighter than metal fittings, making them easier to handle, transport, and install.

Smooth Flow Performance

The smooth internal surface reduces friction, helping maintain efficient fluid flow and minimising pressure loss.

Low Maintenance

Requires minimal maintenance because it resists scaling, corrosion, and chemical damage.

Durability

Strong and long-lasting material that performs well in commercial and industrial piping systems.

Cost-Effective

Compared with metal fittings, CPVC reducer couplers are generally more economical and easier to install, reducing overall project costs.

Types of CPVC Reducer Coupler

Socket Reducer Coupler

The most common type.
Both ends have socket connections for joining CPVC pipes with solvent cement.

Threaded Reducer Coupler

One or both ends have threaded connections.
Used where pipes or fittings require threaded joints for easy installation or removal.

Spigot × Socket Reducer Coupler

One end is a spigot (plain end), and the other is a socket end.
The spigot end fits directly into another socket fitting.

Female Threaded Reducer Coupler

One side has female threads while the other side has a socket connection.
Used to connect CPVC pipes with male threaded fittings or equipment.

Male Threaded Reducer Coupler

One side has male threads, and the other side has a socket connection.
Used where a threaded outlet connection is required.

Concentric Reducer Coupler

Reduces pipe size while keeping the centerline of both pipes aligned.

Eccentric Reducer Coupler

Reduces pipe size with offset centerlines, useful in drainage or flow systems to avoid air pockets.

Applications of CPVC Reducer Coupler

Process Industry

High Purity Applications

Electronic Industry

Electrical Industry

Semi-conductors Industry

Pharmaceutical Industry

Solar power panels

Sugar Industry

Paper & Pulp Industry

Nuclear Power Industry

Automotive Industry

DI water plants

Why Choose Petron Thermoplast?

Petron Thermoplast is a seasoned name in the manufacturing and supply of high-quality CPVC Reducer Couplers. Our Specialities Premium Quality Materials, Long-Lasting Design, Customised Solutions to Suit Every Industry, Timely Delivery and Reliable Service