Rotary Lobe Pumps are ideal for wellpointing and sock. Wellpointing and sock require that the pump be able to selfprime, often to 20 ft; be able to pump both air and water without cavitation damage; and be able to overcome air leaks because of a high air handling capability and still continue to prime. Rotary lobe pumps are now the dominate pump used for wellpointing and sock in the USA. Our sister company www.hollandpump.com has over 200 wellpoint/sock pumps in its rental fleet. They have put more than 1.5 million hours on these pumps with outstanding results.