V.W.
Seems to me that having the property in working order is your landlord's responsibility. It is fine if your husband doesn't mind doing the work and knows what he is doing, but what if there is a bigger problem and your landlord (down the road) says your husband somehow caused the problem by whatever he does to "look at it"?
Why not just call the landlord FIRST, and let him see about getting a plumber out to repair it? Re-read your lease agreement, but I'm sure that something like that would fall under landlord maintenance issues.