Castle Rock Water requires every business to have its backflow assemblies tested each year by a tester registered with the town, along with nonresidential irrigation and some fire suppression systems. The town's water comes mostly from deep wells and is moderately hard. Call the number on this page to be connected with a local plumber in Castle Rock.
Castle Rock in brief
Most of Castle Rock's water comes from deep Denver Basin aquifers, supplemented by alluvial wells, Plum Creek diversions, imported WISE water and reuse. The Plum Creek Water Purification Facility is the main plant. Castle Rock Water uses chloramine and reports average hardness of 100 ppm, with a range up to 182 ppm. Gas is Black Hills Energy rather than Xcel, and some addresses with a Castle Rock mailing address, such as The Village at Castle Pines, are served by other water districts.
Steps to take when something fails
- Close the valve under the affected fixture, or shut the building's main if water is spreading.
- Stop using any drain that's backing up and keep people away from wet floors.
- If water is coming up in the street or near the meter, call Castle Rock Water at 720-733-6000 (press 1 after hours).
- If anyone smells gas, get everyone out, then call 911 and Black Hills Energy, using the number on the gas bill.
- Note when the problem started and photograph any damage.
- Call the number on this page for a plumber to handle the private side.
Symptoms and likely causes
| Symptom | Likely cause |
|---|---|
| Crusty white deposits on faucets and spray heads | Hard water scale, common with Castle Rock's well-based supply |
| Hot water that runs out early | Sediment and scale filling the bottom of the tank |
| Backflow assembly dripping or failing its test | Worn check valves or relief valve seals |
| Several drains slow at once | A blockage in the main building drain or sewer line |
| Running toilets in a busy restroom | Worn flush valve parts |
Cost factors for Castle Rock businesses
The size of the job matters most: one restroom costs less to work on than a full kitchen or a multi-tenant building. Scale can turn a valve repair into a replacement, and the town's FAQ puts hardness at roughly 6.6 to 10.8 grains per gallon. Castle Rock Water doesn't recommend softeners because of the salt they send to wastewater, so ask a plumber about other ways to protect equipment. Backflow assemblies that fail their annual test need repair before a passing report can be filed, and only testers registered with the town can do the testing. After-hours scheduling, access to the meter and cleanouts, and any permits from the town's Building department also affect the price. Castle Rock Water reports that its distribution service lines are non-lead.
Commercial Plumbing questions in Castle Rock
Does a business here need its backflow assemblies tested every year?
Does the local water hardness matter for commercial water heaters and equipment?
What should employees do if they smell gas at work?
Who do we call if a water main or meter problem shuts down the building?
More plumbing services in Castle Rock
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