Have used Union Plumbing twice in the last year for a rental property I own. First time I had them replace a leaking hot water heater, and they were prompt, and had a very reasonable price.
Most recently, I had them check out two leaking toilet supply lines, and they were able to complete the work for the $49 diagnostic fee.
I will always try to use Union Plumbing first for any plumbing needs I have at either the rental property, or, my own house.