Tankless Water Heater Service Valve Installation
Make future tankless maintenance easier with service valves on the hot and cold water lines.
- $250 to $350
- About 1 hr 30 min to 2 hr
What's Included
- Install service valves with flush ports on the water lines
- Choose one side, or both the hot and cold sides
- Check every connection for leaks
- Leave your heater ready for quick, routine flushing
Why It Matters
Service valves provide convenient access for flushing and routine maintenance, helping simplify future service appointments and protect your investment. Without them, a proper flush is much harder to perform.
At a Glance
- Time on site: about 1 hr 30 min to 2 hr
- Category: Installations & Upgrades
- Flat-rate pricing, no surprises
- Serving Chapin, Irmo, Columbia, Lexington, Elgin and Newberry
Choose Your Installation
Both Sides (Hot and Cold)
Service valves installed on both the hot and cold water lines for the simplest future flushing and maintenance.
One Side
A service valve installed on one side of the system to improve access for routine flushing and maintenance.
Common Questions
Do I need one valve or two?
A full flush connects to both the hot and cold lines. If your heater already has a valve on one side, the one-side installation completes the set.
How do I know if I already have service valves?
Look below the heater for valves with small side ports and colored handles on the water lines, like the ones pictured on this page. If you're not sure, email a photo to ms1flush@gmail.com or call (803) 422-7726.
How long does installation take?
About 1 hour 30 minutes for one side and 2 hours for both sides.
Related Services
Flush out mineral scale and clean the ignitor for steady hot water and less wear on your system.
Tankless flush, ignitor cleaning and a residential backflow test in one visit. Save $10 versus booking separately.
Replace the inlet filter to keep water flowing freely and stop debris before it reaches your heater.
What Customers Say
Real feedback from MS Flush customers, shared after their appointments through our booking system.
Ready to Book Your Service?
Choose a time online in a few clicks, or call Michal directly at (803) 422-7726. Flat-rate pricing, no surprises.