ServicesNew Construction Plumbing
New Construction Plumbing in Watertown, TN
We plumb new houses and additions from the under-slab drains to the last faucet. Every stage is tested before the inspector sees it, so your walls close over pipe that has already proved itself. Builders and owner-builders get a clear schedule and one plumber to call.
Plumbing built in the right order
New construction plumbing happens in three passes: underground, rough-in and trim. Each pass has to be right before the next trade covers it. A drain set at the wrong slope under a slab, or a vent left out of a wall, is expensive to correct once concrete is poured or drywall is hung.
We plan the layout from your drawings before the first trench. That means sizing the water service and branch lines for the fixtures you actually have, placing cleanouts where someone can reach them later, and locating the water heater with gas, venting and drainage in mind. If you are weighing a tankless water heater or whole home water filtration, deciding now lets us rough in for it instead of retrofitting after move-in.
We plumb a build the way we would want a neighbor's house plumbed: straight, supported runs, labeled shutoffs and a site left clean for the next crew.
What our new construction work covers
- 01
Underground and slab rough
We lay the building drain and branch lines in Schedule 40 PVC, set to a steady quarter inch per foot on smaller lines, bedded so they cannot sag. The system is water tested before the pour. On crawlspace homes we hang and strap the lines to the joists at proper support spacing.
- 02
Top-out rough-in
Supply lines go in as PEX on a manifold or trunk-and-branch layout, or copper where your plans call for it. We run the drain, waste and vent stacks through the roof, set tub and shower valves, and add steel nail plates wherever pipe passes close to the face of a stud.
- 03
Water service and main shutoff
We run the service line from the meter to the house below frost depth and install an accessible main shutoff. Where street pressure runs high, a pressure-reducing valve protects every fixture downstream.
- 04
Water heater and gas piping
We set tank or tankless units with the expansion tank, a properly routed relief valve discharge line and correct venting. Gas piping is sized for the combined BTU load of every appliance, not just the heater.
- 05
Trim and fixtures
Toilets, sinks, faucets, disposals, dishwasher and ice maker connections, and frost-free hose bibbs go in last, after paint and flooring.
Questions about New Construction Plumbing?
Call(615) 488-4514When your build is ready for a plumber
The fixture layout is settled
With locked-in drawings, we can give an accurate price and get the plumbing permit lined up before any digging starts.
Concrete is on the calendar
Drains under a slab have to be installed, tested and inspected ahead of the pour. Calling once the forms are already set leaves every trade short on time.
Walls are being framed
Plumbing rough normally comes first, since rigid drain pipe cannot curve around ductwork, while flex duct and wiring can work around pipe.
An addition is planned
A new bath, an added wing or a basement getting fixtures needs fresh drains, vents and supply lines connected properly to the plumbing already in your home.
Fixtures moved mid-project
Shifting an island sink or squeezing in a half bath partway through means the drain and vent layout must be redrawn before framing locks in the old plan.
Our steps from drawings to final inspection
- 1
Drawing review and free estimate
We talk through your plans by phone, then visit the lot to count fixtures, confirm the foundation and trace the path from the meter. You receive a written estimate broken out line by line.
- 2
Underground work
We dig the trenches, set drains to grade, bring stub-ups to each fixture spot and fill the system for a water test. Everything stays uncovered until the inspector approves it.
- 3
Rough-in with testing
Once framing is up, we run supply, drain and vent piping and set the valves. Supply lines are held under air or water pressure and drains are water tested, so any weak joint shows itself before walls close.
- 4
Permit and rough inspection
We pull the plumbing permit, book the rough inspection and stand with the inspector on site so questions get answered on the spot.
- 5
Fixtures and final
After finishes go in, we set fixtures and the water heater, flush every line and check each connection under pressure. Before the final inspection, we show you where each shutoff is.
What sets the cost of plumbing a new build
We price new construction plumbing straight from your plans, and the more detail the drawings carry, the tighter the number. Fixture count drives most of it, though the lot and your material choices also play a part. The estimate itself is free. We also offer financing options, and we take all major credit cards as well as cash.
- How many fixtures and baths
- Every toilet, sink, tub and appliance brings its own drain, vent tie-in and supply lines. Baths stacked one above the other share a wet wall and stack, so they cost less to plumb than baths at opposite ends of the house.
- Slab, crawlspace or basement
- On a slab, every drain has to be set before concrete goes down. A crawlspace or basement gives us working room but calls for hangers and strapping, and fixtures below the sewer line may need a sewage ejector.
- Pipe, valves and fixtures
- PEX goes in faster than copper, which shortens labor. Freestanding tubs, body sprays and specialty shower valves add rough-in hours and parts.
- Water heater and gas demand
- Choosing a tankless unit means upsized gas piping and its own vent run, compared with a standard tank heater.
- Ground and distance
- A long run from the meter adds pipe and trench. Shallow limestone, which turns up often in Middle Tennessee, can slow digging for the service line.
New construction plumbing questions
Do you work with general contractors as well as owner-builders?
Yes. We work with builders who need plumbing to hit a schedule and with homeowners acting as their own general contractor. Either way, we coordinate timing with framing, HVAC and electrical so nobody waits on us.
Who handles the plumbing permit and inspections?
We pull the plumbing permit and schedule the rough and final inspections. We are on site for them, so if the inspector has a question about a vent or a test, it gets answered right there.
Should we use PEX or copper?
PEX handles freezing better because it can expand slightly, has fewer fittings inside walls and costs less to install. Copper holds up well in exposed or high-heat locations. Many houses use PEX for distribution with copper at the water heater, and we will explain the tradeoffs for your plans.
Can you rough in for a bathroom we plan to finish later?
Yes. We can set drains, vents and capped supply stub-outs for a future basement bath or bonus room. Doing it during construction avoids cutting a finished slab or opening finished walls later.
Do you take builds outside Watertown?
Yes. We plumb new homes and additions across the surrounding area, including Lebanon, Mount Juliet, Smithville and Murfreesboro. Tell us where the lot is when you call and we will confirm.
Plan the plumbing before the slab is poured
Call with your drawings in hand and we will walk through the fixture layout, the water heater and the route from the meter. Once you have moved in, our 24/7 emergency plumbing service is on the same line.