Stemar multi-size vacuum test heads, manufactured by Vanderlans and Sons, are designed with a robust bladder on a light weight aluminum frame.
FEATURES:
Field replaceable bladder give maximum expansion; covers the widest size range in the industry
The Super Wingnut™ makes adjusting the height of the unit quick and easy
All of our test heads come standard with a 1 ½” vacuum port, shut off valve, gauge measuring up to 30” of mercury, vacuum relief valve and a durable support bar.
Designed for use in the openings of manholes or other precast concrete structures
