TankFittings
Complete your tank install.
Talk to a
specialist
Sizing, regulations, installation. Our team has been answering these questions for over 25 years.
Enhance the functionality and efficiency of your water storage systems with our range of high-quality water tank fittings. Whether you're looking for valves, pipes, connectors, or other essential components, our selection ensures that you find the right fittings to keep your water tank systems running efficiently.
Our collection showcases top-tier materials and meticulous craftsmanship to ensure that each fitting seamlessly integrates into your water storage setup. Designed to withstand various environmental conditions and water pressures, our fittings provide a robust solution for maintaining the integrity of your water tanks and ensuring a consistent water flow.
We understand that every water storage system is unique, and so are its requirements. That's why at Tanks Direct we offer a wide range of fittings, from basic valves to complex pipe systems, ensuring that you have access to a diverse selection. Whether you're setting up a rainwater harvesting system, a household water storage unit, or an industrial-scale tank, our fittings are designed to meet your needs.
With user-friendly designs and clear installation instructions, our fittings are engineered for seamless integration into your existing water tank systems. Experience the convenience of straightforward installations, allowing you to optimise your water storage quickly and efficiently. Crafted with durability in mind, our fittings undergo rigorous testing to meet industry standards.
Check out our range of water pumps and controllers to move or transport water from one location to another, water filters for removing impurities and contaminants from your tank, and our water gauges for monitoring your water tank levels.
Tank Fittings FAQs
How do I know what size fitting my tank needs?
Most tank fittings are sized by BSP (British Standard Pipe) thread diameter, typically ½", ¾", 1" or 2", which should match the boss or aperture moulded into your tank. If you're unsure, measure the internal diameter of the existing fitting or aperture rather than the outside of the pipe, and check your tank's datasheet where available. Get in touch with our team if you need help matching a fitting to a specific tank model.
Are your tank fittings WRAS approved for drinking water systems?
Where a fitting is intended for potable water use, we stock WRAS-approved options clearly marked as such in the product listing. For non-potable applications like rainwater harvesting or irrigation, WRAS approval isn't a requirement, though we still supply robust, weather-resistant components. Always check the individual product description to confirm suitability before fitting to a drinking water supply.
Can I fit these myself, or do I need a plumber?
Basic fittings such as ball valves, outlets and straight connectors are generally straightforward for a competent DIYer to install, and come with clear instructions. However, if you're connecting to mains water, working with a sewage treatment plant, or the job involves below-ground pipework, we'd recommend using a qualified plumber or groundworker to ensure it's compliant with Building Regulations and Water Regulations.
What's the difference between compression and solvent-weld fittings?
Compression fittings use a nut and olive to grip the pipe and create a watertight seal, and can be dismantled and reused if needed — useful for maintenance access points. Solvent-weld fittings are permanently bonded using an adhesive, giving a strong, leak-free joint but no scope for future adjustment. Which you choose often depends on pipe material (MDPE typically uses compression, while uPVC commonly uses solvent-weld) and whether you anticipate needing to service the connection later.
Do tank fittings differ between GRP and polyethylene tanks?
The fitting itself is usually the same standard BSP thread, but how it seats can vary — GRP (fibreglass) tanks often have moulded bosses or flanges, while polyethylene tanks may use bulkhead fittings passed through a drilled hole with a rubber seal each side. It's important to use fittings and washers rated for the tank wall thickness and material to avoid stress cracking or leaks. If you're fitting a bulkhead connector to a polyethylene tank, check compatible wall thickness ranges before ordering.
What fittings do I need for a rainwater harvesting system?
A typical setup requires an inlet fitting with a debris filter or calmed inlet to reduce sediment disturbance, an overflow fitting positioned above the outlet to prevent backflow, and a draw-off or outlet valve, often paired with a floating suction filter to draw the cleanest water from just below the surface. You'll also want a suitable air vent to allow the tank to breathe as water levels change. We can advise on a complete fitting kit based on your tank size and intended use, whether that's garden irrigation or a full household system with a pump.