Filter housing not coming loose upon arrival. Customer stated they’ve had multiple people attempt to get the housing off but no one can get it loose. Gave customer estimate for us to get the housing loose and install the customer supplied filter. Customer chose just for us to get the housing loose and she was going to have the tenants instill the new filters and O-rings for the new filter. Gave customer estimate just to remove housing. Customer approved estimate. Removed housing and left the filter apart for the tenants to install the new filter. The housing is no longer stuck upon departure.