Commercial Plumbing
Shell to working suite, inspected at each stage.
About this serviceDallas-Fort Worth
Midlothian keeps filling in new shell buildings faster than tenants can fit them out, and most of the plumbing surprises in that process are decided before a wall is framed: one sanitary stub in a slab, a capped water service of a particular size, and a lease exhibit that says less than you think.
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A cold shell is four walls, a slab and a set of stubs. On the plumbing side that is usually three things: a sanitary point brought into the slab at one location, a capped domestic water service of a size the developer chose for the whole building, and sometimes a gas stub dead-ended at an exterior wall. None of it was sized for your business, because your business was not known when it was poured.
The first job is to find out what is really there rather than what the exhibit says. We locate and expose the sanitary stub, confirm its size and its invert depth, and camera it back to the main to prove it is genuinely connected and clear rather than assumed to be. More than one tenant has framed a floor plan around a stub that turned out to be capped six feet short of where the drawing put it.
The water service matters just as much. A one inch service that was adequate for a retail suite will not carry a kitchen, and finding that out during the plan review is fine, whereas finding out during the first lunch rush is not.
The number of restrooms you need comes out of occupancy and use group, and it is not negotiable by preference. A suite fitted for offices and the same square footage fitted for a taproom land in different places, and the second one may need separate facilities where the first needs one accessible room.
Two constraints then decide where those rooms go. The first is the stub: everything has to reach it by gravity at a consistent fall, and every foot you move away from it either buries the line deeper or means cutting the slab further. The second is clearance. An accessible stall has dimensions that a demising wall cannot negotiate with, and fixtures placed to suit the tile layout rather than the clearances get pulled out at inspection.
Settle the restroom locations, the mop basin and the water heater position before the framer arrives. Everything else in a fit-out can be adjusted later, at a price. These cannot.
The scope that blows a fit-out budget is almost never the restrooms. It is the list that surfaces in week three: an under-counter dishwasher, an ice machine, a coffee system with its own filtration, a three-compartment sink because someone realised the operation counts as food service, a dedicated hand basin next to it.
Each of those is a fixture with a drain, and several of them cannot be tied directly into the waste. Machines that handle food, ice or clean dishes drain into a floor sink with a visible break above the flood rim, so nothing from the sanitary side can be pulled back into them. That means a floor sink cut into the slab in the right place, which means knowing about the ice machine before the concrete is patched.
If food is being cooked rather than reheated, grease handling enters the conversation and the city will have a view on sizing. And if there is a gas appliance in the plan, the stub at the wall proves nothing about capacity: the run has to be sized for the total load you are adding, at the pressure available, over the distance it actually travels.
Read the work letter with a plumber, once, before it is signed. The recurring disputes are always the same three. Who pays to upsize the service if the building's is too small for your use. Who owns the sanitary line between your stub and the building main, which matters the first time it blocks. And what condition the suite has to be handed back in, because "restore to shell" can mean capping your additions below slab and patching, which is real money at the end of a lease.
Abandoning the previous tenant's work properly is part of this too. Stubs left open under a new slab patch, dead legs holding stagnant water behind a new wall, a floor sink tiled over and forgotten: all of it is cheap to deal with while the floor is open and expensive afterwards.
Keep the record. Photograph every line in the slab before the patch and every wall before the board goes up, with a tape in shot. You will want those pictures at the first service call, at the first insurance question, and again on the day you hand the suite back and somebody asks what is yours.
We would rather be in the conversation at the plan stage than bid a set of drawings that has already committed to an impossible restroom location. Locate the stub, confirm the service, check the load, then draw. On site we work to the general contractor's programme: underslab first and inspected, top out before board, trim when the finishes are in.
Midlothian, Waxahachie, Ennis and the rest of Ellis County are close enough that we can be on site for a slab pour without a travel charge attached to it.
FAQ
In practice it means one sanitary stub and a capped water service somewhere in the suite. It rarely means a water heater, a mop basin, a gas run to your equipment, or a service sized for what you intend to do.
That comes from your occupancy and use group rather than from square footage alone, and the accessible requirements often decide the layout before the count does. Give us the use and the occupant load and we will tell you before you pay for drawings.
If they can reach the sanitary stub at a workable fall, yes. If they are at the far end of the suite from it, the choice becomes a longer slab cut, a deeper line, or moving the rooms. That decision is cheapest on paper.
It is a drain, and it needs one that discharges into an open receptor rather than tying straight into the waste. If the floor is already patched, that is a saw cut. If you tell us in week one, it is a mark on the drawing.
Not without sizing it. A stub tells you gas is available, not how much. We work out the total connected load, the distance and the pressure, and quite often the answer is a larger pipe from the meter rather than a tee off the stub.
Whatever the lease says, and it is usually vague. We camera it and tell you where the blockage is relative to the suite boundary, which is the fact that settles it.
If food is being prepared rather than served pre-made, plan for it. Sizing is set locally, and it is far easier to place one during the fit-out than to retrofit one into a finished floor.
Underslab and inspection typically inside the first fortnight, top out alongside the framing, and trim in the final week before you open. The delays are almost never the pipe. They are inspections, equipment arriving late, and decisions made twice.
Yes, and we prefer it. We would rather hold a slot in a programme and show up on the day than turn up when the slab is already poured over a stub in the wrong place.
Read the restoration clause early. If it requires a return to shell condition, your additions get capped correctly and the slab patched, and that cost belongs in the original budget rather than in a surprise at the end.
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Get the stub located and the service sized before the drawings are finished.
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