Not sure which fitting you need? Tell us what you have, we show you what screws onto it — live prices and stock.
Pipe thread chart: inch / mm conversion (BSP, 15/21, 20/27, S60x6)
A “1/2 inch” thread measures 20.96 mm, not 12.7: in plumbing, the inch size is not converted, it is read from a chart. Here you will find the inch / mm correspondence of every common thread (BSP or “gas thread”, French names 15/21 · 20/27 · 26/34, NPT, S60x6 IBC tanks, Guillemin, Camlock, PVC), a tool that identifies your thread and the fitting that goes with it, and the pitfalls to avoid.
Which thread do you have? Which fitting do you need?
No need to know the name of your thread. Tell us what you need to connect to, or type what you know (“20/27”, “3/4 inch”, “S60x6”, “26.4 mm”): we identify the thread and show you the fittings that go with it. Dimensions according to ISO 228, ISO 7 and ASME B1.20.1.
✔ Shipped next working day from our stock✔ 4.5/5 from more than 6,400 customer reviews✔ Not sure? Describe what you need, we will find the fitting with you⎙ Printable thread gauge (PDF, actual size)
No need to know the name of your thread. Just answer the question: what do you need to connect to?
With a caliper, measure the outside diameter of a male (thread visible on the outside) or the inside diameter of a female (thread inside the hole), at the root of the thread.
The Multitanks 2-way selector transforms your 20/27 tap into a dual watering station. With its 2 continuously adjustable outlets , manage multiple garden zones simultaneously or easily alternate between different watering tools. Practical solution to optimize irrigation of your green spaces without multiplying water...
The Multitanks 2-way selector transforms your 20/27 tap into a dual watering station. With its 2 continuously adjustable outlets , manage multiple garden zones simultaneously or easily alternate between different watering tools. Practical solution to optimize irrigation of your green spaces without multiplying water...
The aquastop Premium fitting GARDENA offers a robust, high-quality metal-plastic design, allows for a quick and convenient connection and a change of device at the end of the pipe.
The aquastop Premium fitting GARDENA offers a robust, high-quality metal-plastic design, allows for a quick and convenient connection and a change of device at the end of the pipe.
Universal faucet nozzle 1'' - 3/4'' designed to fit all standard faucets thanks to its innovative adaptation collar. Compatible with 20x27 (3/4'') and 26x34 (1'') threads. Accepts all female quick couplings by simple click-lock for instant connection of your irrigation systems. Practical and durable solution for homeowners...
Universal faucet nozzle 1'' - 3/4'' designed to fit all standard faucets thanks to its innovative adaptation collar. Compatible with 20x27 (3/4'') and 26x34 (1'') threads. Accepts all female quick couplings by simple click-lock for instant connection of your irrigation systems. Practical and durable solution for homeowners...
The aquastop Premium fitting GARDENA offers a robust, high-quality metal-plastic design, allows for a quick and convenient connection and a change of device at the end of the pipe. Inner Diam: 19mm
The aquastop Premium fitting GARDENA offers a robust, high-quality metal-plastic design, allows for a quick and convenient connection and a change of device at the end of the pipe. Inner Diam: 19mm
The Multitanks 4-Way Irrigation Selector transforms a simple tap into a versatile irrigation center. Equipped with 2 male Gardena outlets and 2 threaded outlets 20x27 mm , each with its own independent adjustment valve. Ideal for home gardeners and professionals wanting to manage multiple...
The Multitanks 4-Way Irrigation Selector transforms a simple tap into a versatile irrigation center. Equipped with 2 male Gardena outlets and 2 threaded outlets 20x27 mm , each with its own independent adjustment valve. Ideal for home gardeners and professionals wanting to manage multiple...
GARDENA Y-Connector Reducer High Flow (Reference: 2834-20): the ideal solution to connect a high-flow hose to two standard hoses . This technical piece distributes water between two different irrigation zones while optimizing flow rate. Compatible with the GARDENA fitting system , it simplifies the installation of...
GARDENA Y-Connector Reducer High Flow (Reference: 2834-20): the ideal solution to connect a high-flow hose to two standard hoses . This technical piece distributes water between two different irrigation zones while optimizing flow rate. Compatible with the GARDENA fitting system , it simplifies the installation of...
The Profi-system high-flow valve hose fitting is GARDENA specially designed to be used with long pipes or pumps. It allows the fitting devices to be modified, especially in case of high pressure.
The Profi-system high-flow valve hose fitting is GARDENA specially designed to be used with long pipes or pumps. It allows the fitting devices to be modified, especially in case of high pressure.
19mm Repair or Extension Fitting - The ideal solution for repairing a punctured irrigation hose or extending your irrigation network. This robust plastic fitting installs quickly by simple clamping/pinching on your 19mm diameter hoses. Compatible with all standard irrigation hoses, it guarantees perfect sealing and tool-free installation....
19mm Repair or Extension Fitting - The ideal solution for repairing a punctured irrigation hose or extending your irrigation network. This robust plastic fitting installs quickly by simple clamping/pinching on your 19mm diameter hoses. Compatible with all standard irrigation hoses, it guarantees perfect sealing and tool-free installation....
IBC 1000 L accessories 
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