The regulator assembly has been replaced with a bacteria filter, eliminating the cap and float assembly. This filter will prevent fluids and other contaminants from damaging the pump. This durable unit continues to meet the need for controlled vacuum regulation from 0" up to 22" Hg with a flow rate of 28 lpm. Standard Features: Vibration-free easy-to-read regulator gauge. Sturdy basket accommodates 800cc or 1200cc Canisters. Hydrophobic/bacteria filter eliminates pump flooding, and prevents contaminant damage. Includes: Bacteria Filters, 800cc Canister and Quick Connect Tubing Set. (115/60 hz) *We offer the Accessories to Maintain this Pump