ELEY watering tools are produced from 100% drinking water safe, lead-free brass, machined with standard 3/4-inch Garden Hose Threads (GHT), which is the standard thread used throughout the USA and Canada for virtually all garden hose and watering tools. As such, ELEY watering tools are compatible with almost any brand of garden hose or watering tool sold in North America. However, garden hose thread (GHT) is not compatible with NPT (National Pipe Thread), typically found on most steel and brass pipe fittings. So remember, 3/4-inch GHT is not the same as 3/4-inch NPT.