1. Introduction
This manual provides instructions for the installation, operation, and maintenance of the Mcalpine S28M Multi-Purpose Straight Connector. This connector is designed to facilitate the connection of various pipe types within waste systems.
The Mcalpine S28M is a 1 1/4 inch straight connector suitable for use with plastic waste pipes conforming to BS EN 1451-1: 200 and BS EN 1329-1: 2000 standards, as well as copper and lead pipes. It is constructed from durable plastic and features a multi-fit design for versatile application.

Image 1: Mcalpine S28M Multi-Purpose Straight Connector. This image shows the white plastic connector, highlighting its straight design and robust construction.
2. Setup and Installation
Proper installation is crucial for the effective and leak-free operation of the connector. Follow these steps carefully:
- Preparation: Ensure that the ends of the pipes to be connected are clean, smooth, and free from burrs or debris.
- Measurement: Accurately measure the required length for the connection. If cutting pipes, ensure a straight cut.
- Component Assembly: Slide the compression nut and compression ring (if separate) onto each pipe end. Ensure the tapered side of the compression ring faces towards the connector body.
- Insertion: Insert the pipe ends fully into the connector body. The multi-fit design allows for a secure fit with various pipe materials.
- Tightening: Hand-tighten the compression nuts onto the connector body. Then, use an appropriate wrench to tighten them further, ensuring a firm, leak-proof seal. Avoid over-tightening, which can damage the components.
- Leak Check: After installation, run water through the system and carefully inspect all connections for any signs of leakage. If leaks are detected, re-tighten the nuts slightly or disassemble and re-seat the compression rings.

Image 2: Technical drawing of the Mcalpine S28M connector. This diagram illustrates the connector's components, including the 1 1/4 inch multifit connections and an overall length of 63.5mm, aiding in precise installation.
3. Operating Instructions
The Mcalpine S28M Multi-Purpose Straight Connector operates passively within your plumbing system. Once correctly installed, it functions to create a sealed connection between pipes, allowing for the unimpeded flow of waste water. No active user interaction is required for its operation.
4. Maintenance
To ensure the longevity and continued performance of your Mcalpine S28M connector, consider the following maintenance guidelines:
- Regular Inspection: Periodically check the connector and surrounding pipework for any signs of leaks, cracks, or damage.
- Cleaning: If necessary, clean the exterior of the connector with a soft cloth and mild detergent. Avoid abrasive cleaners or harsh chemicals, as these can degrade the plastic material.
- Environmental Factors: Ensure the connector is not exposed to extreme temperatures or direct sunlight for prolonged periods, which could affect material integrity.
5. Troubleshooting
Should you encounter issues with your Mcalpine S28M connector, refer to the following troubleshooting tips:
- Leaks at Connection Points:
- Ensure compression nuts are adequately tightened.
- Verify that the compression rings are correctly seated and not damaged.
- Check for any foreign objects or debris preventing a proper seal.
- Inspect the pipe ends for damage or uneven cuts that might compromise the seal.
- Difficulty in Fitting Pipes:
- Confirm that the pipe size matches the connector's 1 1/4 inch specification.
- Ensure pipe ends are clean and free of burrs.
- A small amount of silicone lubricant can assist in easier insertion, if compatible with the pipe material.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Mcalpine |
| Model Number | S28M |
| Part Number | S28M |
| Size | Pipe Size - 1 1/4 inch |
| Color | White |
| Material | Plastic |
| Item Weight | 60 grams |
| Product Dimensions (L x W x H) | 5.8 x 7.5 x 7.5 cm |
| Number of Units | 1 |
| Number of Pieces | 1 |
| Measurement System | Metric |
| Included Components | Trap; Fittings; |
| Connector Type | Adapter |
| Thread Type | BSPP |
| Batteries Included | No |
| Batteries Required | No |
| First Available Date | August 14, 2012 |
| Discontinued by Manufacturer | No |
| ASIN | B003JYV5US |
| Global Trade Identification Number | 05036484003485 |
7. Warranty Information
Warranty details for the Mcalpine S28M Multi-Purpose Straight Connector are not explicitly provided in the product information. For specific warranty terms and conditions, please refer to the product packaging or contact Mcalpine directly.
8. Support
For further assistance, technical inquiries, or support regarding the Mcalpine S28M Multi-Purpose Straight Connector, please contact the manufacturer, Mcalpine, through their official website or customer service channels. Always refer to the product packaging for the most up-to-date contact information.





