Drain Testing Kits

About Drain Testing Kits

Drain testing kits are essential equipment for verifying the integrity and water-tightness of drainage systems in domestic, commercial, and industrial properties. MyToolShed.co.uk stocks professional-grade drain testing equipment including complete kits, U gauges, replacement tubing, and individual components from trusted brands like Bailey. These specialist testing kits enable tradespeople to conduct air and water pressure tests on new drain installations or existing systems to identify leaks, blockages, or structural defects before they cause costly damage.

A properly conducted drain test is often a mandatory requirement for Building Control approval on new builds and extensions, making these kits indispensable for plumbers, drainage engineers, and construction professionals. Complete drain testing kits typically include air gauges or U gauges, rubber tubing, and drain plugs of various sizes. The testing process involves sealing the drainage system at strategic points and introducing air or water pressure to monitor whether the system maintains the required pressure over a specified period, with any drop indicating a leak requiring investigation.

Applications

• Plumbers and heating engineers – testing new drainage installations on residential and commercial projects to obtain Building Control sign-off
• Drainage specialists – conducting surveys, maintenance inspections, and fault-finding on existing drainage systems
• Building contractors and site managers – verifying drainage work before covering or completing construction phases
• Civil engineers – testing larger-scale drainage infrastructure on commercial developments and public works
• Property maintenance teams – diagnosing drainage issues as part of routine maintenance programmes
• DIY enthusiasts – homeowners undertaking significant drainage work such as extensions or renovations requiring Building Control approval

Choosing The Right Drain Testing Kits

Consider whether you need a complete kit or individual components to supplement existing equipment. Complete kits like the Bailey drain test kit provide everything necessary for professional testing in one package, offering better value and ensuring all components work together reliably. This is ideal for tradespeople who regularly conduct drain tests or those setting up for the first time.

The type of gauge is crucial. U gauges filled with coloured water provide simple, reliable visual indication of pressure and require no batteries or calibration. They're robust, accurate, and widely accepted by Building Control inspectors across the UK. Ensure your kit includes appropriately sized stoppers for the pipe diameters you typically work with—professional kits should accommodate common domestic drainage pipes from 100mm to 150mm as a minimum.

Build quality matters significantly for tools used in demanding site conditions. MyToolShed.co.uk stocks established brands like Bailey that specialise in drainage equipment, offering robust construction, clear markings, and replaceable components. Quality tubing should resist kinking and remain flexible in cold weather, while gauges should feature protective cases and legible scales that comply with British Standards requirements.

Safety Information

Always follow proper safety procedures when conducting drain tests. Ensure adequate ventilation when working around drainage access points, as sewer gases can be hazardous. Wear appropriate PPE including gloves and eye protection, particularly when handling drain stoppers used in contaminated systems. Never over-pressurise drainage systems beyond recommended test pressures, as this could damage pipes or cause stoppers to dislodge suddenly.

Be aware of confined space regulations if entering chambers or manholes to install test equipment. Monitor gauges carefully throughout the test period and never leave pressurised systems unattended. Release pressure slowly when removing stoppers to prevent sudden discharge, and dispose of any contaminated water responsibly in accordance with environmental regulations.

Frequently Asked Questions

How long should a drain air test maintain pressure?

Building Regulations typically require drainage systems to maintain test pressure for a minimum of three minutes for pipes up to 150mm diameter, and five minutes for larger pipes. The system should show no more than the permitted pressure drop during this period, usually around 25mm on a U gauge. Always check with your local Building Control inspector for specific requirements.

What pressure should I test drains at?

Standard air testing pressure for domestic drainage is typically 100mm water gauge (approximately 10 millibars). This is sufficient to identify leaks without risking damage to properly installed drainage systems. Always refer to current Building Regulations and British Standards for specific requirements, as these may vary depending on system type and pipe materials.

Can I use the same kit for foul and surface water drains?

Yes, the same drain testing kit can be used for both foul drainage and surface water systems. However, keep separate stoppers for hygiene reasons, or thoroughly clean and disinfect equipment between uses. The testing procedure and acceptance criteria remain the same regardless of drainage type.