Local7 min read
Post-Tension Slabs & Plumbing: A Johnson Ranch-Era Home Guide
Nearly every home in San Tan Valley sits on one. It is the reason a good plumber here would rather run a new line through your attic than touch your floor.
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Plumbing service
Walk-In Shower Conversion Plumbing in San Tan Valley
Taking out a tub and putting in a walk-in shower is mostly a plumbing job before it is a tile job. The drain has to move, the valve has to be replaced and set at the right height, and on a slab-on-grade house in San Tan Valley the drain relocation means opening concrete — which is the part that decides the budget and the schedule.
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Walk-In Shower Conversion in San Tan Valley
What you need to know about walk-in shower conversion here
This is work we do constantly in the active-adult communities out here. **Solera, Encanterra, Sun Lakes** and the older Johnson Ranch phases were largely built with a tub in the primary bathroom that nobody uses, and converting it is the single most requested bathroom change in those neighborhoods.
Signs you need us
When to call about walk-in shower conversion
If any of these describe what you are seeing, it is worth a phone call — most of them get cheaper the earlier they are caught.
A primary-bathroom tub nobody has used in years
The most common reason people call. It is floor space doing nothing, and on a slab house converting it is a defined, finite job.
Stepping over the tub wall has become the problem
A 15–17 inch tub wall is the fall risk in most homes. A curbless or low-threshold entry removes it entirely.
Planning ahead rather than reacting
Far cheaper and far less disruptive done deliberately than done quickly after a fall or a hospital discharge.
A tub surround that is failing anyway
If the surround is cracked or leaking and needs replacing regardless, that is the moment to reconsider the whole fixture rather than replace like for like.
A guest bath that would be more useful as a shower
Common in homes where the primary already has a shower and the second tub is simply unused floor space.
What you get
The plumbing scope of a conversion
We are the plumbing contractor on this work. Below is exactly what that covers — and further down, plainly, what it does not.
- Tub removal and safe disposal
- Drain relocation, including cutting and patching the slab where the new position requires it
- New P-trap and drain assembly set to the shower's design — centre, offset or linear
- Pressure-balancing or thermostatic valve supply and installation
- Valve set at the correct height and depth for the finished wall
- Shower pan drain connection and slope verification before anything is closed up
- Blocking for grab bars set while the wall is open — far cheaper now than later
- Supply lines brought to a rain head or handheld position where specified
- Permit pulled and inspection scheduled where Pinal County or the town requires it
- Pressure test and documented sign-off before the wall closes
Walk-In Shower Conversion details
What we do, and what we do not
We are plumbers, and saying so plainly saves everyone a wasted visit. We handle the water: tub removal, drain relocation, valve, supply, blocking, permits and inspection. Waterproofing, tile, glass and finish carpentry belong to a tile contractor or a bathroom remodeler. Most of our conversions run alongside one, and we are happy to coordinate scheduling so the trades do not collide — but we will not quote you tile work we do not do.
If you want a single contractor holding the whole job, hire the remodeler and have them bring us in for the plumbing. That is a perfectly good way to run it.
Why the slab is the thing that decides your budget
Almost every home in San Tan Valley is slab-on-grade, and a great many are post-tension slabs. The drain for a tub sits in a different place from the drain for a shower, so the relocation means cutting concrete — and on a post-tension slab you cannot cut without knowing where the cables run. We scan before we cut, every time. It is not optional and it is not a line item we will skip to win a quote.
If your new shower can be laid out so the drain stays close to the existing position, the slab work shrinks and so does the price. That is worth discussing before the tile is chosen rather than after. See the post-tension slab plumbing guide for why this matters so much locally.
Decisions worth making before the tile is ordered
| Decision | Why it is a plumbing decision | Cheapest time to make it |
|---|---|---|
| Curbless or low threshold | Curbless needs the drain lower and the slab recessed | Before any concrete is cut |
| Linear or centre drain | Changes the slope direction and the relocation distance | Before the slab cut |
| Grab bar positions | Blocking must go in while the wall is open | While the wall is open — retrofitting is far more |
| Handheld, rain head or both | Each needs its own supply run and valve ports | At valve selection |
| Thermostatic valve | Holds temperature when another fixture draws — worth it for anyone with reduced sensation | At valve selection |
| Bench or fold-down seat | A built-in bench changes the pan and the waterproofing detail | Before framing |
What a conversion does not require
Two things get sold into these jobs that usually are not needed. The first is moving the whole bathroom layout — unless the room genuinely does not work, keeping the toilet and vanity where they are saves a great deal of slab work for no loss. The second is a full repipe of the bathroom. If the supply lines are sound and the house has water treatment, there is no reason to open walls beyond the valve. We will tell you if your lines genuinely need attention; otherwise the answer is no.
What does occasionally come up legitimately is drain venting. Some builder layouts vented the tub in a way that does not suit a shower in a different position, and correcting that while the wall is open is cheap. We would flag it at the estimate, not discover it halfway through.
Timing it around the rest of your house
If the primary bathroom is your only full bath, the conversion means a few days of planning around one shower or none. Most people in the active-adult communities out here have a second bathroom and the disruption is modest. Where it is the only one, we stage the work so the room is usable overnight wherever the cure times allow, and we are honest in advance about the days when it will not be.
How we work
Our walk-in shower conversion process
No surprises, no mystery. Here is exactly what happens from the phone call to the walkthrough.
- 1
1. Look at the actual bathroom
Where the existing drain sits, which direction the joists or slab run, where the valve wall backs onto, and whether the layout you want keeps the drain close to where it already is.
- 2
2. Scan the slab, then quote
On a post-tension slab we locate cables before promising anything about the drain position. The written estimate follows the scan, not the other way round.
- 3
3. Permit where required
Drain relocation is permit-required work in most jurisdictions here. We pull it and schedule the inspection rather than leaving it with you.
- 4
4. Demolition and rough-in
Tub out, slab cut where needed, drain relocated, valve set, blocking in for grab bars, everything pressure-tested and inspected before the wall closes.
- 5
5. Hand over to tile, then come back for trim
The tile contractor waterproofs and finishes. We return to set the valve trim, head and handheld, and to confirm drainage and temperature under real use.
What it costs
What drives the price of walk-in shower conversion
We do not publish flat prices for work nobody has looked at — that is a guess dressed up as a quote. Here is what actually moves the number, so you can read any estimate you receive.
How far the drain has to move
The single biggest variable. A shower laid out near the existing drain can avoid most of the slab work; one at the far end of the footprint cannot.
Post-tension slab or conventional
Post-tension requires scanning and a more careful cut. Conventional slab is simpler and cheaper to open.
Curbless or low threshold
A true curbless entry needs the slab recessed, not just cut — more concrete work and more coordination with the tile contractor.
Valve type and number of outlets
A single pressure-balancing valve is straightforward. Thermostatic with a rain head and a handheld means more ports, more supply runs and more labour.
Permit and inspection requirements
Varies by jurisdiction. We tell you which applies to your address as part of the estimate rather than adding it afterwards.
Why Economy Plumbers
Why San Tan Valley homeowners call us for walk-in shower conversion
Licensed, bonded and insured Arizona plumbing contractor. 20+ years of combined plumbing experience, dispatched from 2769 E Combs Rd — and 4.9★ from 168 customers who mostly mention the same things.
We scan post-tension slabs before cutting
Standard practice here, not an upcharge. Cutting a tendon is a structural repair nobody wants to pay for.
We work in these communities constantly
Solera, Encanterra, Sun Lakes and the older Johnson Ranch phases share a handful of builder floor plans. We have usually seen your bathroom before.
Blocking for grab bars goes in by default
Unless you tell us not to. It costs almost nothing while the wall is open and it is expensive and ugly to add afterwards.
We are honest about the trade boundary
We quote plumbing. We will not pretend to be a tile contractor to keep the whole job, and we will coordinate with yours.
Permits and inspection handled
Including tracking which jurisdiction your address actually reports to, which has been moving since the town incorporated.
Get a written quote for walk-in shower conversion
Flat-rate pricing agreed before work starts, and we will tell you honestly if there is a cheaper answer.
- Licensed, bonded & insured
- 24/7 emergency dispatch
- Upfront written pricing
- 100% satisfaction guarantee
Where this comes up most
Walk-In Shower Conversion across San Tan Valley and Pinal County
These are the areas where we run this service most often, and why.
Shower Conversion in Sun Lakes
Five 55+ country-club communities with very high homeownership; 1970s–90s plumbing, accessibility upgrades and vacation-away leak checks drive steady demand.
Shower Conversion in Solera at Johnson Ranch
The 55+ active-adult section of Johnson Ranch, where demand skews to no-hot-water emergencies, comfort-height fixtures and softener service on a fixed-income schedule.
Shower Conversion in Encanterra / Trilogy at Encanterra
Luxury Shea Homes golf community in the 85140 ZIP (annexed by Queen Creek before incorporation), with high-end fixtures, a Trilogy 55+ section and premium softener and RO demand.
We serve San Tan Valley and the surrounding Pinal County area — see every area we cover.
Questions we get
Walk-In Shower Conversion FAQs
The plumbing scope is driven almost entirely by how far the drain has to move and whether you are on a post-tension slab — which is why we scan and look before quoting rather than giving a number over the phone. We put a flat, written figure in front of you before anything starts, and tile and glass are quoted separately by that contractor.
No. We are the plumbing contractor: tub removal, drain relocation, valve, blocking, permits and trim. Waterproofing, tile and glass are a tile contractor's trade. We work alongside them regularly and will coordinate scheduling so the job does not stall between trades.
Usually, yes — it requires recessing the slab rather than simply cutting it, which is more work but entirely routine. On a post-tension slab we scan for cables first and will tell you honestly if your layout makes a true curbless entry impractical.
Our plumbing portion is typically a few days spread across rough-in and trim, but the overall timeline is set by tile and waterproofing cure times between our two visits. Your tile contractor's schedule, not ours, usually determines the total.
Yes, and we would encourage it. While the wall is open it is a trivial addition. Adding solid blocking later means opening finished tile, which is the expensive version of the same job.
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- Licensed, bonded & insured
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- 100% satisfaction guarantee