Quick Answer
Low water pressure with propane on-demand heaters can be caused by issues such as insufficient water supply, clogged filters, or improper system design. Troubleshooting involves checking these factors and adjusting system settings or components as needed. Regular maintenance can help prevent such problems.
Identifying the Root Cause
When troubleshooting low water pressure with a propane on-demand heater, start by verifying the water supply. Typically, a household needs a minimum of 10 gallons per minute (GPM) of cold water flow to meet the demands of a standard household with two to three people. If the available water supply is below this threshold, it may be necessary to install a larger water tank or upgrade the water well or municipal supply.
Checking System Components
Next, inspect the on-demand heater’s filters, which can become clogged and restrict water flow. Check the filter’s micron rating and replace it if necessary. Typically, a 20-micron filter is sufficient for most residential applications. Also, inspect the heater’s orifices and valves for mineral buildup or debris, which can impede water flow. Cleaning or replacing these components as needed can help restore proper water pressure.
Optimizing System Design
Review the system’s design to ensure it meets the household’s hot water demands. For example, if the household has a large family or multiple people showering simultaneously, a larger on-demand heater may be required. Consider installing a backup system, such as an electric water heater, to supplement the on-demand heater during peak periods. Additionally, consider upgrading to a more efficient on-demand heater, such as one with a higher GPM rating or a more advanced control system.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.