Plumbers Tallow

About Plumbers Tallow

Plumbers tallow is a traditional jointing compound that has been used in the plumbing trade for generations. This petroleum-based paste provides a reliable seal for threaded pipe fittings, preventing leaks in both hot and cold water systems. When applied to male threads before assembly, tallow fills any gaps and irregularities, creating a watertight connection that can withstand the pressures and temperature variations found in domestic and commercial plumbing installations.

The selection of plumbers tallow available from Tooled-Up.com includes both traditional formulations and modern alternatives designed for specific applications. Unlike PTFE tape or liquid sealants, tallow remains soft and pliable, making it ideal for joints that may need to be disassembled in future. It's particularly valued for use on brass fittings, iron pipework, and older installations where its forgiving nature compensates for worn or damaged threads.

While newer sealing technologies have emerged, plumbers tallow remains an essential product for professional installers working on heritage properties, maintenance projects, and situations where traditional methods are specified. Its ease of application, reliability, and compatibility with various metals make it a staple in every plumber's toolkit.

Jargon Buster

• Thread Sealant: Any material applied to threaded connections to prevent fluid or gas from leaking through the spiral gaps between male and female threads.
• Jointing Compound: A paste-like substance used to seal pipe joints and fittings, typically containing fibres or particles suspended in a petroleum or synthetic base.
• BSP Threads: British Standard Pipe threads, the tapered thread standard commonly used on UK plumbing fittings that relies on sealant to create a watertight connection.
• Hemp and Tallow: A traditional sealing method combining hemp fibres with tallow paste, used extensively on larger diameter iron pipework.
• Petroleum-Based Compound: Sealants made from refined petroleum products that remain soft and don't harden completely, allowing for future joint disassembly.
• Working Pressure: The maximum continuous pressure that a sealed joint can safely withstand during normal operation, typically measured in bar or PSI.

Who Uses Plumbers Tallow?

• Plumbers and Heating Engineers: Daily users for domestic and commercial installations, particularly when working with traditional materials and heritage systems.
• Maintenance Technicians: Facilities management professionals maintaining older plumbing systems in schools, hospitals, and commercial buildings.
• Restoration Specialists: Tradespeople working on listed buildings and period properties where traditional methods and materials are required.
• Gas Fitters: Occasionally used on specific non-gas pipe connections where approved for the application.
• Agricultural Engineers: Those installing and maintaining water systems in farm buildings and agricultural settings.
• DIY Enthusiasts: Homeowners tackling plumbing repairs and maintenance projects, particularly on older properties with traditional pipework.
• Marine Engineers: Professionals working on boat and ship plumbing systems where traditional jointing methods remain common.

How to Choose the Right Plumbers Tallow

When selecting plumbers tallow at Tooled-Up, consider the application and working conditions. Standard petroleum-based tallow is suitable for most cold and hot water systems operating below 100°C. Check that the product is approved for use with potable water if you're working on drinking water installations, ensuring compliance with Water Supply (Water Fittings) Regulations.

Container size matters for different users. Professional plumbers typically opt for larger tubs (400g to 1kg) which offer better value and ensure supply for multiple jobs, while occasional users may prefer smaller containers that won't dry out before being used up. Consider the storage conditions in your van or workshop, as tallow can become harder in cold weather and softer in warm conditions.

For specific applications, check compatibility with the pipe materials you're working with. While tallow works excellently with brass, copper, and iron fittings, some modern plastic and composite materials may require alternative sealants. Always verify that your chosen product is suitable for the working pressure and temperature of your installation, and check whether it's approved for both hot and cold water systems if needed.

Popular Accessories

• PTFE Tape: Often used alongside or as an alternative to tallow for sealing threaded connections on modern installations.
• Hemp Fibre: Traditional fibrous material wound onto threads before applying tallow, particularly for larger diameter pipework.
• Pipe Wrenches: Essential tools for tightening threaded fittings after applying sealant to the correct torque.
• Thread Brushes: Wire brushes for cleaning old threads before applying fresh tallow to ensure a proper seal.
• Joint Paste: Liquid or gel sealants for use on compression fittings and alternative applications.
• Flux and Solder: For creating permanent sealed joints on copper pipework where threaded connections aren't used.
• Adjustable Spanners: For making up threaded joints with the appropriate force to compress the tallow seal.

Safety Information

While plumbers tallow is generally safe to handle, always follow basic hygiene practices. Wash hands thoroughly after use, particularly before eating or smoking, as petroleum-based products can cause skin irritation with prolonged contact. If skin irritation develops, discontinue use and seek medical advice. Store tallow in a cool, dry place away from direct sunlight and heat sources, keeping containers tightly sealed when not in use.

When working on potable water systems, ensure the tallow you're using is specifically approved for drinking water applications and complies with relevant Water Regulations Advisory Scheme (WRAS) approvals. Never use plumbers tallow on gas pipe threads unless the product is explicitly approved for gas installations, as most standard formulations are only rated for water systems. Always follow the manufacturer's technical data sheet for specific application instructions and safety information.

Frequently Asked Questions

Can I use plumbers tallow on gas pipes?

Standard plumbers tallow is not approved for use on gas pipe threads. Gas installations require specific gas-rated sealants that meet BS EN standards for safety. Only use products explicitly approved for gas when working on gas pipe connections, and ensure all work is carried out by a Gas Safe registered engineer.

How much tallow should I apply to pipe threads?

Apply a thin, even coating to the male thread only, ensuring the first two threads remain clean to prevent contamination entering the system. The tallow should fill the thread valleys without excessive build-up. When the joint is tightened, a small amount should squeeze out, indicating proper coverage without over-application.

What's the difference between tallow and PTFE tape?

Tallow is a paste-based sealant that remains soft and pliable, making joints easier to disassemble later. PTFE tape is a thin plastic film that's cleaner to use and preferred for modern installations. Tallow often provides better sealing on worn or damaged threads and is traditional for iron and brass fittings, whilst PTFE tape is popular for contemporary installations and smaller diameter connections.

Does plumbers tallow have a shelf life?

When stored correctly in a sealed container away from heat and direct sunlight, plumbers tallow can last several years. If the product has dried out significantly, separated, or changed consistency dramatically, it's best to replace it. Always check the manufacturer's recommendations and ensure the container lid is fitted tightly after each use to prevent drying.

Is tallow suitable for drinking water systems?

Many plumbers tallow products are approved for use on potable water systems, but always check the product specifications and ensure it meets Water Regulations Advisory Scheme (WRAS) approval. The tallow should be specifically labelled as suitable for drinking water applications to comply with UK water supply regulations.