Hayward 2" Slip In Line Sight Glass (SP1074S) aquastar A focused replacement like this A focused replacement like this is especially useful when the surrounding filter body remains serviceable and the weakness is isolated to the latches themselves An auxiliary topside panel can make a spa feel much more complete because it gives users access to important functions from a second location instead of forcing every adjustment through the main control point Hayward in line sight glass The Hayward in line sight glass is designed for compatible plumbing and filtration applications where visual line inspection is needed