Use this brass nipple pipe fitting to connect one pipe to a valve, instrument or another pipe. This connector has two male threaded ends measuring 3/4 x 2-1/2. Brass pipe fittings are ideal for carrying water, chemicals, flammable gases, slurries, and other plumbing substances. Brass nipple May be used with brass, steel, iron and aluminum threaded pipe Used with water, air, gas, oil and liquid petroleum Lead-free