The Waterco Baker Hydro HRV 30 and 36 bulkhead seal is designed for compatible bulkhead applications where the sealing element around the connection point needs replacement. A bulkhead seal is useful because it helps maintain a watertight interface through the vessel or assembly wall, which is one of the most important points in preserving dependable performance.This replacement is especially useful when the original seal has flattened, cracked, hardened, or started leaking after years of service. Using the correct seal for the supported HRV 30 and 36 applications helps keep the repair precise rather than relying on a generic substitute.The 31B9036 is a practical sealing component when a compatible Baker Hydro HRV bulkhead connection needs to be restored with the right part. Waterco Baker Hydro HRV 30 and 36 bulkhead seal Designed for compatible bulkhead sealing applications Helps restore dependable sealing at the connection point Useful when the original seal is worn or leaking Supports a cleaner and more accurate repair