TECHNICAL PRODUCTS King New Water Feeder 400/600 ./ 630 Lid Cover O-ring 01-22-9920, 01-22-9926 King New Water Feeder 400 / 600 ./ 630 Lid Cover O-ring Fits: MODELS 400 AND 600 INLINE, 430 AND 630 OFFLINE generic orings 01-22-9920, 01-22-9926