18mm* Hose End Connector

The O-Ring to O-Ring faces are not compatible between the 12mm and 18mm range. However you can make a connection between the 2 systems by coupling an 18mm Accessory Connector into a 12mm Tap Connector (or vice versa). 

18mm hose fittings have been designed specifically for use with 18mm internal diameter garden hoses and cannot be used with regular 12mm garden hoses.

Larger internal 18mm diameter hoses and fittings are typically used in low water pressure situations, or where a high volume of water is required.  They are often used in commercial situations such as at sporting fields, golf courses, nurseries, farms and parks.  Many people in rural situations use these hoses where water pressure is very low, such as supply from a dam or tank.  Anyone can choose to use 18mm hoses and fittings but they're typically used as a solution to low water pressure.

Our 18mm hose fittings have been designed with locking tabs to ensure they never, ever twist apart.  We DO NOT recommend you insert these to begin with as once installed, they cannot be removed (and may get in the way of easy use).  They may be useful in situations where the weight and particular use pulls the fittings apart, such as at a hose join.  In this instance, you can insert a locking tab (on one side only is necessary) to ensure the fittings won't twist apart.

We wanted to make it easy for customers who use both 12mm and 18mm hose fittings to identify which is which.

The 18mm measurement refers to the internal diameter of the garden hose, not the external diameter. We recommend measuring the internal diameter of your hose before purchasing to ensure compatibility.