Spa drain and refill
A spa drain and refill replaces water that has stopped responding to chemicals. Total dissolved solids build up in a small hot volume, and once they do, dosing stops working and the water feels flat. We drain, clean the shell, refill, and rebalance to a written target before we leave.
Signs you need this
- The water feels slick and looks dull
- Dissolved solids have climbed past the point where chemicals help. That slick feel is old product, oils and minerals riding in water that cannot hold anything new. No dose fixes it. The water has to come out.
- Foam rises the second the jets turn on
- Soaps, lotions and laundry softener carried in on swimsuits build up in small water. Once foam appears on every startup, defoamer only hides it. Fresh water and a clean filter are the actual answer.
- Chlorine disappears within an hour of dosing
- Demand is being eaten by what is already dissolved in the water. You are dosing a debt, not a spa. Once you add sanitizer daily and still read zero, a refill costs less than another month of product.
- The jets blow out flecks of dark debris
- Biofilm has taken hold inside the plumbing where no brush reaches. Draining alone leaves it there. A line flush before the drain is what actually clears it, and skipping that step restarts the same problem in weeks.
- pH will not stay where you set it
- High dissolved solids and spent alkalinity mean the water has no buffer left. You set pH on Saturday and it has moved by Monday. That is water at the end of its life, not a dosing mistake.
What is included
Included in the plan
- Drain the spa to a safe discharge point
- Clean the shell, seats and footwell while dry
- Wipe the waterline and clear the filter housing
- Refill and purge air from the jets
- Rebalance to a written target and log the numbers
Extra, and always in writing first
- Line flush before the drain to clear biofilm
- Filter cartridge replacement when cleaning will not recover it
- Scale removal at the waterline on hard water fills
- Heater check while the spa comes back to temperature
Extras need a written yes with the dollar amount before the work starts. No verbal add ons, ever.
What it costs
Quoted after a photo
Spa volume, where the water can legally discharge, hose reach, whether a line flush is needed first, and the state of the filter all change the number. Send a photo of the spa and the equipment side and we price it before we schedule.
We do not publish a number the phone will not honour. See how pricing works.
What moves the price
A range is only honest if you can tell which end you are on. These are the things that decide it.
| Factor | What it does to the number |
|---|---|
| Spa volume and hose reach | A larger spa takes longer to empty and longer to fill, and a spa far from a spigot adds hose runs in both directions. Distance and volume are the two plainest things that move this number. |
| Where the water can legally go | Discharge has to land somewhere that will not flood a bed, cross a property line, or enter a storm drain. On tight lots that means pumping to a further point, which adds real time to the visit. |
| Whether a line flush comes first | If the plumbing is fouled, a purge runs before the drain and adds a cycle to the job. Skipping it is cheaper today and more expensive within a season, so we recommend it when we see the signs. |
| Filter condition on the day | A cartridge that cleans up goes back in. One packed with oil or carrying collapsed pleats gets replaced, and that part is quoted alongside the visit rather than buried somewhere inside it. |
Drain and refill or keep dosing
| Drain and refill | Keep adding chemicals | |
|---|---|---|
| Time to clear water | One visit | Weeks, if it happens at all |
| What it costs to run | A fresh start and normal dosing | Rising product spend every week |
| How the water feels | Clean, with no slick film | Flat and slick whatever the reading says |
| Effect on the shell | Balanced water going forward | Scale and staining keep building |
Short version. Once dissolved solids are high there is no chemical that undoes it. Fresh water becomes the cheaper option long before most owners reach for it.
Our process
Flush first when it is needed
If the water is slimy or the jets blow debris, a purge before the drain clears biofilm out of the plumbing. Refilling over a fouled line just restarts the clock on the same problem.
Drain and clean
Water goes to a discharge point that will not kill landscaping or run into a neighbor yard. The shell, seats and footwell get cleaned while they are dry and reachable.
Refill and purge
We refill, purge air from the jets, and bring the spa back to temperature. An air locked pump is the most common thing that goes wrong on a refill done in a hurry.
Balance and log
North Texas fill water is hard and comes in high on calcium and alkalinity. We balance from that real starting point and write the numbers down so the next visit has a baseline.
How long it takes
Send a photo of the spa
Priced before we book
Flush and drain
A few hours on site
Refill and purge the air
Same visit
Balanced and logged
Numbers written down before we leave
Through a North Texas year
- March to MayPollen and oak tassels blow into an open spa all spring. Water that wintered through heavy use is usually due, and this is the easiest window to book before summer fills up.
- June to AugustRefills warm quickly so downtime is short. The catch is that fill water is at its hardest and heat pulls calcium out fast, so we balance carefully on day one rather than the following week.
- September to NovemberPeak spa season in North Texas. A refill done before the cool evenings start means the spa is at its best when you actually want it, instead of tired by Thanksgiving.
- December to FebruaryWe keep a cold weather refill short so nothing sits empty overnight. On freeze nights we move the appointment rather than leave your plumbing dry and exposed to a hard cold snap.
Our water. You are refilling with hard water, so the spa starts life at 150 to 250 parts per million of calcium and a high alkalinity. That is not a blank slate. We test the fill itself, then bring alkalinity down and set pH before the heater has had a chance to bake minerals onto the shell and the element.
Common mistakes we get called to fix
Refilling through a jet instead of the footwell
Filling through a jet line pushes air into the pump and locks the impeller. That is the most common way a refill ends with a pump that will not prime, and it is entirely avoidable.
Turning the heater on before the level is up
A heater firing with water below the sensor runs dry for a moment, and a moment is enough to trip the high limit or crack an element. Fill first, purge the air, then bring the heat on.
Dosing cold fill water and walking away
Cold water dissolves product slowly and a reading taken an hour later means nothing. Undissolved chemical sitting on the shell bleaches it. Circulate the water, give it time, then test.
Spa drain and refill Flower Mound: picking the right week
Timing matters more than people expect. A spa drain and refill Flower Mound weather allows is easiest in spring or fall, when the shell is not sitting in 100 degree sun and the fill water is not near freezing. Refilling an empty spa on the hottest afternoon of July puts stress on the surface and makes the first balance harder to hold. If the water can wait two weeks, waiting usually pays.
Plan for the hose, not just the crew. Most spas here take a couple of hours to fill from a standard tap, and the heater needs several more before anyone gets in. We book a spa drain and refill Flower Mound customers ask for early in the day for that reason, and we tell you the hour the water should be ready rather than leaving you watching a cold tub.
The spa refills we get called out for are almost never scheduled. They are the Friday call after a week of family visiting, when heavy use finally ran the water out of buffer and nobody wants to get in.
What this looks like on a real job
Photo slot
A real in-progress shot from a spa drain and refill job. Crew or equipment visible, not a stock backyard.
Photo slot
The finished result plus a clear photo of the equipment pad, the kind that goes into the photo report after every visit.
Related work on the same route
Common questions
How often does a spa need to be drained?
Divide the spa volume in gallons by three times the daily bather count. A 400 gallon spa used by two people every day works out to roughly two months. Heavy use spends the water sooner than the calendar suggests.
Can I just add more chemicals instead?
For a while. Once dissolved solids are high, chlorine and pH stop holding and you are spending money chasing a number that will not sit still. Fresh water is cheaper than another season of shock.
Where does the old water go?
To a discharge point that will not flood a bed, a neighbor yard, or a storm drain that should not take treated water. We settle that before we start, not after four hundred gallons are already moving.
Start this week
Send the city and a pad photo. You get the plan before the first stop.