4 Inch Clay to PVC Flexible Connector 121–136mm / 110–121mm | VIPSeal | VAC4000

Description

The VIPSeal VAC4000 flexible connector is a flexible 4 inch clay to PVC connector designed to join compatible older clay drainage to modern plastic underground drainage. This 121-136mm to 110-121mm adaptor is commonly used as a 110mm PVC drainage adaptor and provides a durable flexible EPDM drainage connector for drainage repairs, alterations and replacement work. VIPSeal manufactures VAC4000 as part of its VAC stepped adaptor coupling range. The larger connection accepts pipes measuring 121–136mm outside diameter, while the smaller connection covers 110–121mm.

VIPSeal VAC4000 Flexible Connector

The VIPSeal VAC4000 flexible connector is the genuine manufacturer reference for the 121–136mm / 110–121mm adaptor within the VIPSeal VAC range. The VIPSeal VAC4000 flexible connector is designed to bridge the difference between two pipe outside diameters using a step-moulded flexible body and independently tightened stainless-steel bands.

Choosing the VIPSeal VAC4000 Flexible Connector

Choose the VIPSeal VAC4000 flexible connector where the larger pipe measures between 121mm and 136mm outside diameter and the smaller pipe measures between 110mm and 121mm. Always measure both pipes before ordering, particularly when connecting older clay drainage to modern PVC-U systems.

4 Inch Clay to PVC Connector

The VAC4000 is commonly used as a 4 inch clay to PVC connector where older nominal 4 inch clay drainage needs to connect into compatible 110mm PVC-U underground drainage pipe. The actual outside diameters of clay and plastic pipe can differ despite both being described by similar nominal sizes. A flexible 4 inch clay to PVC connector accommodates that dimensional difference without relying on rigid reducers or improvised packing.

Installing a 4 Inch Clay to PVC Connector

Before fitting the 4 inch clay to PVC connector, expose sound sections of both pipes and measure their outside diameters. Do not measure over clay sockets, collars, PVC fitting sockets or damaged areas. The larger pipe should fall within 121–136mm and the smaller pipe within 110–121mm. Clean both pipe surfaces, position the adaptor centrally across the joint and tighten both tension bands evenly to the manufacturer’s specified torque.

121-136mm to 110-121mm Adaptor

The 121-136mm to 110-121mm adaptor has two distinct connection ranges:

• Larger pipe outside diameter: 121–136mm
• Smaller pipe outside diameter: 110–121mm

The stepped design of the 121-136mm to 110-121mm adaptor allows pipes with noticeably different external dimensions to be joined within one flexible fitting.

Selecting a 121-136mm to 110-121mm Adaptor

Both pipes should sit comfortably within their respective diameter ranges. Actual pipe O/D is more important than nominal descriptions such as 4 inch or 110mm. If the smaller pipe measures below the VAC4000 range, the tighter-fit VAC1362 may be more appropriate.

110mm PVC Drainage Adaptor

The 110–121mm smaller connection makes VAC4000 useful as a 110mm PVC drainage adaptor for compatible underground drainage pipe. A 110mm PVC drainage adaptor of this type can be particularly useful when damaged clay drainage is being repaired or partly replaced using modern plastic pipework.

110mm PVC Drainage Adaptor Applications

The 110mm PVC drainage adaptor can be used in suitable foul-water and surface-water drainage systems where both pipe outside diameters fall within the stated VAC4000 ranges.

Flexible EPDM Drainage Connector

VIPSeal manufactures the VAC adaptor range from EPDM rubber, making VAC4000 a durable flexible EPDM drainage connector. The step-moulded flexible EPDM drainage connector conforms around compatible pipe surfaces while stainless-steel tension bands secure each end independently.

Flexible EPDM Drainage Connector Construction

Standard VIPSeal VAC couplings use stainless-steel tension bands, with higher-grade stainless options available from the manufacturer for specialist environments. The standard product should be listed according to the specification supplied with your stock rather than assuming a specialist alternative version.

VAC4000 vs VAC1362 Tight Fit

VAC4000 and VAC1362 both accept 121–136mm on the larger side, but the smaller connection ranges are different.

• VAC4000: 121–136mm / 110–121mm
• VAC1362: 121–136mm / 100–115mm

VAC4000 is therefore the wider PVC-side option, while VAC1362 is the tighter-fit version. Measure the smaller pipe carefully before choosing between the two. Do not select purely from the description “4 inch clay to PVC”.

Clay and Plastic Drainage Repairs

The VIPSeal VAC4000 flexible connector is useful for applications including:

• Connecting compatible 4 inch clay to 110mm PVC drainage
• Replacing broken sections of clay drainage
• Extending older clay systems using plastic pipe
• Underground drainage repairs
• Foul-water drainage alterations
• Surface-water drainage alterations
• Joining compatible pipes with different outside diameters

Pipe Selection by Outside Diameter

VIPSeal VAC adaptors are selected primarily by actual pipe outside diameter. This is important because older clay, cast iron and other drainage systems can have different external dimensions from modern plastic pipework despite similar nominal descriptions. Always confirm both measured pipe diameters before ordering VAC4000.

VIPSeal VAC Adaptor Performance

VIPSeal manufactures the VAC range for suitable low-pressure drainage applications. Correct installation requires clean pipe surfaces, appropriate alignment and even tightening of both tension bands. The fitting should be used within the manufacturer’s published operating conditions rather than treated as a general high-pressure pipe fitting.

VIPSeal VAC4000 Flexible Connector Key Features

• Genuine VIPSeal VAC4000
• Flexible stepped adaptor coupling
• Larger pipe O/D: 121–136mm
• Smaller pipe O/D: 110–121mm
• Common application: 4 inch clay to 110mm PVC
• Wider PVC-side fit than VAC1362
• EPDM rubber construction
• Stainless-steel tension bands
• Suitable for compatible underground drainage repairs and alterations
• Designed for pipes with differing outside diameters

Shop Flexible Drainage Connectors

Browse our Flexible Connectors range for clay-to-PVC adaptors, flexible couplings, end caps and other specialist underground drainage connections. For current manufacturer specifications, see the official VIPSeal VAC Adaptor Couplings product information. The VIPSeal VAC4000 flexible connector provides a dependable 4 inch clay to PVC connector using a 121-136mm to 110-121mm adaptor configuration, making it a practical 110mm PVC drainage adaptor and versatile flexible EPDM drainage connector.