B and K 160-005HC Galvanized Compression Coupling, 1" - Amazon.com
Eastman 4-1/8 Inch Long Pattern Compression Coupling, 3/4 Inch IPS, Galvanized Steel, 20564 - Amazon.com
JONES STEPHENS 2-1/2 in. IPS Malleable Iron Compression Coupling, Long Pattern 6-3/4 in. Body Length for IPS & Schedule 40 Pipe Repair C11250 - The Home Depot