Mark Vargas: The Licensed Plumber Behind Every Permit Silverback Pulls

When a plumbing company pulls a permit in Texas, the state ties that permit to one named, licensed individual rather than to the business. At Silverback Plumbing and Drain, that person is Mark Vargas. Here is his license, his record, and how to confirm both yourself in about a minute.

Mark Vargas Owner and Responsible Master Plumber, Silverback Plumbing and Drain, Helotes and San Antonio, TX

Confirm the License Before You Read Any Further

Most plumbing websites ask you to accept a credential claim on faith. This one does not need you to. Every field below can be checked against the state's own public register, and it takes roughly a minute.

Run the same check on any plumber before you let them into your home. If a company cannot give you a name and a number that resolves on that page, that is worth knowing before the work starts rather than after.

What an RMP Is Actually On the Hook For

Texas requires every licensed plumbing business to name one specific Master Plumber as its Responsible Master Plumber. That individual, not the company, is who the state holds accountable for the business's plumbing work, its permits, and its compliance with state code. It is a personal legal exposure, which is why the designation is not handed out casually.

The practical version for a homeowner: there is a real person's license attached to the work done in your house, and that license can be suspended. If you want the full breakdown of how Texas plumbing licensing works, including the four license tiers and the supervised hour requirements behind each one, we cover that separately in what a Texas plumbing license actually takes.

Fourteen Years in One City

Mark has spent his entire plumbing career in San Antonio, the city he grew up in. That matters more in this trade than it sounds. San Antonio's housing stock, soil movement, and water chemistry produce a specific set of recurring failures, and a plumber who has only worked here has seen those same failures play out across thousands of homes rather than reading about them.

• 2011Begins working as a licensed plumber in San Antonio.
• 2020Earns his Texas Master Plumber license.
• 2021Receives the Responsible Master Plumber designation and founds Silverback Plumbing and Drain.
• 2026Silverback is named a MYSA Readers' Choice Award winner for plumbing in San Antonio.

Around the shop he answers to "The Silverback," a name that started with his willingness to move a fifty gallon water heater down a flight of stairs without help and stuck for a different reason: the people who work for him describe steadiness rather than force. His standing rule on a call is that the homeowner should understand the problem before hearing a price, and that nobody gets sold a repair larger than the fault requires.

Why He Went Deep on Water Quality

Beyond general plumbing, Mark pursued training in water treatment and purification, largely because of what San Antonio's own water does to a house over time. Scale on fixtures, shortened water heater life, and appliances that fail years early are not abstract problems here, and seeing the same damage repeatedly across local homes is what pushed him toward the coursework.

"After realizing how the quality of the water can affect a person's health, I invested in myself and took courses to better understand the true nature of water." — Mark Vargas

That training is why Silverback treats a softener as a sizing and diagnosis question rather than a single recommended unit, and why the same knowledge gets applied to diagnosing why a fixture or appliance failed in the first place. Our guides on what hard water does to San Antonio plumbing and whether a water softener is worth the cost come out of that same work.

The Work Mark Takes Personally

Mark still runs calls rather than managing from an office, and he keeps four categories of work close because each one carries either a permit, a safety consequence, or a diagnosis that gets misread often:

• Water softener installation, where sizing errors are the most common reason a system disappoints.
• Gas line work, which is permitted, inspected, and unforgiving of shortcuts.
• Sewer line repair, where an accurate diagnosis is the difference between a spot repair and a replacement.
• Water heater installation, where the failure that brought you here is often downstream of water chemistry.

He also trains the plumbers working alongside him to the same standard: diagnose the actual cause, explain it in language the homeowner can repeat to their spouse, then price it. That is a deliberate culture decision, and it is the reason the experience holds up on jobs Mark is not personally standing on.

Where to Check Us Outside This Website

Anything a company writes about its own owner is, fairly, discounted. These are places the record exists independently of us:

• The Texas State Board of Plumbing Examiners public license register, for the credential itself.
• Silverback's GuildQuality profile, where customer survey results are collected by a third party rather than by us.
• The 2026 MYSA Readers' Choice Awards, where San Antonio residents voted Silverback a winner in plumbing.
• Google Business Profile reviews from San Antonio homeowners, which carry a five star average.

Questions Homeowners Ask About Mark and Silverback's License