The Original Gast 1532 High Volume Sampling Pump is a durable, economical choice for lead and asbestos area sampling. Its rugged construction and low maintenance has made it one of the most popular lead and asbestos sampling pumps on the market! With the Original Gast 1532 producing free flow rate of over 45LPM, users will find that with a supplied locking flow valve, air flow can be sufficiently controlled at rates from 2LPM – 35LPM. The Original Gast 1532 utilizes rotary Vane cores to achieve vacuum. The Original Gast 1532 pump has an internal muffler chamber and moisture containment system eliminating the need for the Glass Jar system that was found on the Gast 1531 models.