Aluminum 4" Storz x 3" Male NPT Thread Threads_NYFD x NYFD and a rubber gasket is

and a rubber gasket is often included to secure the male and female connection

The female threaded side of this adapter will only connect to a 2 inch male National Pipe Tapered (NPT) thread

Slip one hole over 1 inch PVC pipe driven into water source bottom

Pentagon nut at top of spindle discourages unauthorized use

Intended to keep debris out only

Aluminum 4" Storz x 3" Male NPT Thread Threads_NYFD x NYFD and a rubber gasket isStorz Head component shall be forged from Alloy 6061 aluminum and heat treated to T6 temper. Adapters and components meet the requirements of NFPA 1963. Locking Storz are only available on 4, 5, and 6 inch. Locking springs prevent unintentional disconnects. Locks are stainless steel. The Safe Water Drinking Act section 1417 requires "Lead Free" products to be a minimum of 99. 75% lead free. Download Spec Sheet