McAlpine HC7+FSW50PDR Bathroom Basin and Shower Trap System, Combined Trap and Flow-Rate Control

The McAlpine HC7+FSW50PDR Bathroom Basin and Shower Trap System is a combined trap assembly designed for bathroom waste drainage. It integrates a water-seal trap with a flow-control/overflow feature to manage discharge from both basin and shower fittings. The unit connects to standard waste outlets and is intended to minimise odours while providing controlled drainage for domestic bathroom installations.

Advantages

This combined trap and flow-rate control unit offers a reliable water seal to prevent sewer gases entering the bathroom and includes an integrated overflow/flow-management function to regulate discharge from connected fittings. Its compact design reduces under-basin clutter and simplifies a two-fixture connection, while being compatible with common waste pipe dimensions used in residential bathrooms.

Suitable for

• Domestic bathroom installations where a basin and shower share a drain route
• Replacement of separate trap and overflow assemblies with a single combined unit
• Situations requiring a compact trap beneath a basin with an integrated flow-control for shower connection

When it may not be suitable

This product is intended for standard bathroom waste systems; it may not be suitable for commercial or heavy-duty applications where larger flow rates or specialised drainage arrangements are required. It is also not appropriate where pipe diameters, installation space or local plumbing codes demand a different trap configuration or materials.

Key specifications

• Application: combined basin and shower waste drainage
• Function: integrated water-seal trap with flow-control/overflow feature
• Compatibility: connects to standard bathroom waste outlets and common domestic pipe sizes
• Design: compact under-basin assembly to reduce space requirements
• Material characteristics: engineered for typical bathroom wastewater conditions

How to use

Install the trap assembly beneath the basin and connect the dedicated inlet for the shower overflow or waste connection according to the product orientation. Ensure both inlet and outlet connections are fitted to the corresponding pipework with appropriate seals and clamps to prevent leaks. Verify the unit is aligned for correct water sealing and test by running water in both basin and shower to confirm controlled discharge and absence of odour. Follow local plumbing regulations and, if necessary, consult a qualified plumber for installation.

What to consider before purchase

• Confirm compatibility with your existing waste pipe diameters and connection types
• Check available space under the basin for the trap assembly and any additional tubing
• Verify that the combined trap/flow-control arrangement meets local plumbing codes and installation requirements
• Assess whether the unit's flow-control capacity suits expected shower and basin use

Usage recommendations

During installation, tighten all seals hand-tight plus a small additional turn with appropriate tools; avoid overtightening plastic fittings. Periodically inspect for blockages and clean the trap as part of routine bathroom maintenance to preserve the water seal and flow-control performance.