SIZE RANGE: 2 - 6 inch (50 mm -150 mm) MAX TEMP: 150°F (65°C) MAX PRESSURE: 150 PSI*

SEWAIR-MAXI® - Cast iron body, 303 stainless steel trim. Threaded female x female connections. NITRILE (Buna-N) seat. Large orifice–equals inlet size vents on filling. Eliminates vacuum in waste water pipeline under pressure loss.

Inlet Pressure MIN: 20 PSI*
Inlet Pressure MAX: 150 PSI*

Warranty: 1 Year

Discount Code B
FOB Factory





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SEWAIR-MAXI® Literature

Sizes and Prices

Part Number Size Weight Spring Range Stainless Steel
List Price
Carbon Steel
List Price
Case Qty Style Plug Size Cracking Pressure By Pass Outlet Inlet Part #
Part #
Flanged 150
List Price
6620 2" 49 1" $1,505
6621 2" 90 2" $2,847
6622 3" 100 3" $3,480
6623 4" 120 4" $4,822
6624 6" 210 6" $8,090

* For alternate lower or higher pressure applications consult factory. 

For unit with backflush attachment, add "BF" to end of the part number and add list price. See backflush. 

For 316SS trim, add "ST" to the end of the part # and 20% to the list price.