Set Expansion Tank Pressure
2:28
9:08
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At 2:28 in
Helping My Neighbor Install a 50-Gal Rheem Gas Water Heater
What happens here
First, check the house water pressure by screwing a 'Watts' pressure checker onto an outdoor hose bib. Record the reading (e.g., 70 PSI). Next, connect a 'Topeak' floor pump to the expansion tank's Schrader valve and inflate the tank to match the recorded house water pressure. This ensures the expansion tank can properly absorb pressure fluctuations.
Goal: Match the expansion tank's pre-charge pressure to the house water supply pressure.
Tools and materials
- Expansion Tank Therma-Gard — Absorbing thermal expansion in the water system
- Topeak Floor Pump Topeak — Inflating the expansion tank
- Watts Pressure Checker Watts — Measuring house water pressure