Parts Sight glass replacement glass PreviousHigh Temp O-Ring (fits valves, thermometers, & through wall fittings) NextComplete Sight Glass Assembly Sight glass replacement glass Sight glass replacement glass $20.00 Sight level gauge glasses are marked in gallons. If you would like them marked in liters please specify in comments. Gallons: Select Gallons 15.525304550 15.5 25 30 45 50 Quantity: Add To Cart Facebook0 Twitter You Might Also Like Complete Sight Glass Assembly $121.00