Bathtub automatic waste with brass chrome knob McAlpine MP31SSF-CBSQ

The McAlpine MP31SSF-CBSQ is an automatic bathtub waste with a brass chrome-finish control knob designed for straightforward water drainage and simple open/close operation. Intended for installation within the bath rim or overflow area, this automatic waste provides a compact fitting that integrates with most standard bathtubs. The brass control knob and chrome finish offer corrosion resistance and a clean appearance suitable for residential and light commercial bathrooms.

Advantages

The brass construction of the control knob improves durability and resistance to wear and corrosion compared with non-metallic controls. The automatic waste mechanism enables push/turn style operation that is easy to use and requires no separate plug or chain. The compact design minimises visible components in the bath interior while providing a reliable seal for water retention and controlled release when opened. Chrome finishing ensures compatibility with common bathroom fixtures and simplifies cleaning.

Suitable for

• Standard built-in bathtubs in domestic bathrooms
• Light commercial bathroom installations where a push/turn waste is required
• Renovation projects replacing outdated or damaged wastes with a compact automatic unit
• Installations that prioritise a corrosion-resistant control knob and simple operation

Key specifications

• Type: Automatic bathtub waste with push/turn control
• Control material: Brass with chrome finish
• Operation: Open/close mechanism, manual push/turn actuation
• Installation: Compact in-bath installation compatible with standard bathtub fittings
• Finish: Polished chrome appearance for visual match with chrome bathroom fittings
• Use environment: Suitable for residential and light commercial bathrooms

How to use

To operate, press and/or turn the brass chrome knob to engage the opening or closing of the waste mechanism; the design provides a sealed hold of bath water when closed and allows controlled drainage when opened. Standard installation requires connection to the bathtub outlet and the waste trap according to plumbing practice; ensure appropriate sealing and alignment during fitting to avoid leaks. Periodic inspection of the control knob and waste mechanism will help maintain smooth operation and a reliable seal.

Usage recommendations

For reliable performance, install the automatic waste following local plumbing codes and use appropriate sealants or gaskets as required. Avoid using aggressive chemical cleaners directly on the chrome-finished knob to preserve finish integrity; routine cleaning with mild detergent and soft cloth is recommended. If high mineral content in water is present, check and clean the mechanism periodically to prevent buildup that could affect sealing and operation.