Expansion Tank Installation in Orange County, CA
Closed plumbing systems (PRV/check valve on the main) can spike pressure every time water heats up—stressing pipes, dripping T&P valves, and shortening heater life. White Glove Plumbing & Restoration installs potable-rated expansion tanks that absorb this expansion, stabilize pressure, and satisfy code.
✓ Protects plumbing: absorbs thermal expansion
✓ Stops T&P drips: relieves pressure spikes
✓ Code-compliant: required on closed systems
✓ Sized & set right: volume and precharge matched
✓ Protects plumbing
✓ Stops T&P drips
✓ Code-compliant
✓ Sized & set right
What Is Expansion Tank Installation?
A turnkey service that adds a potable (NSF-listed) diaphragm tank to the cold water line feeding your heater.
We size the tank to the heater and temperature rise, precharge it to your home’s static pressure, mount/support it correctly, and verify that system pressure stays within limits (typically < 80 psi) through a heat cycle.
Why Choose White Glove Plumbing
Compliance & safety first: Installed on the cold inlet, correct support/orientation, and precharge matched to static pressure.
Defensible documentation: Photos, before/after pressure readings, model/serials, and warranty info.
Beyond the tank: PRV (pressure regulator) checks, mixing (tempering) valves, leak auto-shutoff, and pressure gauges.
One accountable team: We can replace the water heater, correct venting/valving, and fix root-cause issues the same visit.
Immediate Actions (What to Do Now)
Do not cap the T&P valve—it’s a safety device.
Note symptoms: morning pressure spikes, intermittent T&P discharge, banging when the heater cycles.
Snap photos of the heater, cold-side piping, and any PRV/backflow device.
Check a gauge if you have one (static vs. when the heater fires).
Call our 24/7 dispatcher—we’ll test pressures, size the tank, and install per code.
Common Situations We Handle
Closed systems created by a PRV or backflow preventer
T&P valve drip after showers or overnight
Heater replacement where the inspector requires an expansion tank
High static pressure or large thermal swings in multi-unit buildings
Recirculation systems that see frequent reheating cycles
Survey & Pressure Test
Identify PRV/backflow, measure static and dynamic pressure, note heater size and setpoint, and check for existing leaks.
Size & Precharge
Select a potable-rated tank sized to heater volume/temperature rise; set air precharge to match measured static pressure.
Mount & Support
Install on the cold inlet near the heater; vertical preferred; add bracket/strap when horizontal or on flexible connectors.
Connect & Isolate
Tie in with copper/PEX or stainless flex; add isolation/service tee and optional pressure gauge for easy checks.
Commission & Verify
Fill, purge air, heat the tank through a cycle; confirm pressure remains stable and < 80 psi; check T&P remains dry.
Close-Out & Documentation
Label precharge value and date; provide photos, readings, and care tips; note PRV setting/mixing valve status.
What’s Included
Pressure testing & system review (PRV/backflow check)
Properly sized potable expansion tank
Precharge set to match static pressure
Mounting/support & code-correct tie-in on cold inlet
Heat-cycle verification with before/after readings
Documentation packet (photos, readings, warranty info)
Costs & Timelines (What to Expect)
Closed systems created by a PRV or backflow preventer
T&P valve drip after showers or overnight
Heater replacement where the inspector requires an expansion tank
High static pressure or large thermal swings in multi-unit buildings
Recirculation systems that see frequent reheating cycles
Insurance & Compliance Support
Inspector-ready: Placement on cold side, support, labeling, and pressure logs.
Policy alignment: We follow local plumbing codes and manufacturer specs; COIs available.
Property management: We can tag equipment and record pressures for PM logs.
Risks of Waiting (Why Act Now)
T&P discharge & water damage around the heater
Stress on pipes, valves, and appliances from repeated spikes
Shortened heater life and nuisance leaks
Failed inspections on new installs or property sales
Methods, Materials & Quality Standards
Potable-rated (NSF/ANSI 61) diaphragm tanks—not hydronic boiler tanks
Proper support when horizontal; dielectric isolation and neat routing
Precharge accuracy verified with a calibrated gauge (system depressurized)
Target pressures: Static set to your home; PRV typically 50–70 psi, system kept < 80 psi under heat
Labeling: Precharge value/date and service sticker for easy future checks
Frequently Asked Questions
Does an expansion tank fix water hammer?
No. That needs water-hammer arrestors. The expansion tank controls thermal pressure rise.
Where is it installed?
On the cold inlet to the water heater, as close as practical.
How long do they last?
Typically 5–10+ years. We recommend annual pressure checks; replace if waterlogged or out of precharge.
Do I need one with tankless or heat pump heaters?
If your system is closed, yes—any heater type can create thermal expansion.
What should the precharge be?
Match your static house pressure (measured with no flow), not “whatever came from the factory.”
My pressure is already high—will this lower it?
An expansion tank prevents spikes; a PRV sets overall pressure. We can adjust/replace the PRV if needed.
More White Glove Plumbing Hot Water System Services
Proudly Serving All of Orange County
Address: 1430 E Borchard Ave, Santa Ana, CA 92705
Phone: (949) 209-5206
Email: office@whitegloveplumbingca.com
White Glove Plumbing is locally based in Santa Ana and serves residential and commercial clients across Orange County with 24/7 emergency plumbing and water-damage restoration.
Our expert team handles leak detection, emergency plumbing, water extraction/dry-out, sewage cleanup, mold remediation, and reconstruction in top OC areas including Irvine, Anaheim, Santa Ana, Orange, Tustin, Costa Mesa, Newport Beach, Huntington Beach, Mission Viejo, Lake Forest, Fullerton, Yorba Linda, Laguna Beach, Dana Point, and San Clemente - plus surrounding neighborhoods.
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1430 E Borchard Ave, Santa Ana, CA 92705