Underhill 1 x 3/4 Brass Hose Adapters are used to adapt any 1″ hose threaded connections to the standard 3/4″ spigots or spray nozzles. These work well with the 1″ size ShortyPro heavy duty garden hose. Garden Hose Threads (GHT, FHT, MHT) are unique in that they make the water-tight seal with a flexible washer between the two connection pieces. Thread seal tape is not recommended since it can inhibit the full threading together of the pieces, thus not allowing a tight leak-proof seal. GHT are not compatible with NPT or IPT/IPS fittings commonly found in iron pipe or PVC water systems.