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Gas Pool Heater Installation

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Gas pool heaters are an excellent option for pool owners who wish to use their pools far into the winter months. It is possible to swim even in the cooler months of the year because these devices raise the water temperature. The heater’s combustion chamber warms the water that enters via the filter. It is then returned to the pool, allowing you to enjoy warm water while you swim. Before the weather becomes too cold, you may do it yourself by following these simple instructions.

How Does a Gas Pool Heater Work?

Unlike any other standard water heaters, pool heaters use natural gas or propane. Water circulated by the pump passes through a filter to the heater—gas burns in the heater, generating heat transferred to the water. The water is then returned to the pool.

Gas heaters quickly heat pool water and are ideal for people who occasionally use their pool. Because natural gas and propane burn quickly, these heaters are more efficient. They also have a cheaper upfront cost, typically around $1,500. Because they release carbon dioxide, gas heaters are not the most energy-efficient alternative. If you don’t want carbon dioxide in your pool, a green heater, such as an electric heater, would be a better option. Going green is beneficial to both your health and the environment. Gas heaters also have a shorter lifespan than electric heaters, with an average lifespan of only five years.

Before the weather becomes too cold, you may do it yourself by following these simple instructions.

How to Install a Heat Pump for the Pool

Your heat pump is not only a wise investment, but it’s also the most cost-effective way to heat your pool or spa. 

You may need the help of a certified electrician or a natural gas technician to ensure that your heater is installed correctly and safely. Different pool heater types will require further clearance and ventilation restrictions, and all manufacturer specifications should be followed precisely.

Decide where to put the heater

When deciding on a location, keep in mind the necessary clearance distances above and to the sides of the equipment to ensure its safe operation. If you’re not sure about the space, consult the owner’s manual or the manufacturer’s instructions to be safe. For the sake of efficiency, you should keep it near the filter. As close as two or five feet away from the filter is ideal for this installation.

Direct the flow of water to the heater

Measure the distance from the filter’s return value to the heater’s inlet valve before installing the heater.

Pass Warm Water into the Pool

swimming pool in the garden

Cut a length of PVC pipe and run it from the heater’s outlet valve to the water inlet for the swimming pool. The pool will be filled with warm water as a result of this. Apply a plumbing compound to these pipes and junctions to ensure a tight seal.

Connect the Gas Line and the Power Source

Before connecting the heater’s gas pipes, check with your local authorities to see if they require a professional. Before pressurizing the lines, they will most likely need to be inspected. To avoid this, connect a flex gas line to the heater’s inlet and a shut-off valve to the end of your gas pipe. Then, plug in your heater’s 120-volt connector to an electrical outlet. Plug the heater into the outlet with a weather-resistant cover.

Setup a test

After completing your natural gas pool heater installation and setup, it’s time to test the unit and make any necessary changes. Restart the pool filter before turning on the heater and raising the thermostat a few degrees. Before the heating is turned on, a fan will blow. Make sure that the heater is emitting blue light.

After you switch on the heater, the water temperature in the pool will rise quickly. The easiest method to minimize mishaps is to switch off the power when the pool is not in use, even though most systems feature flow sensors that detect low water pressure and prevent the unit from turning on.

Installation Tips

You can expect your heat pump pool heater to last for up to ten years or more if you follow the proper swimming pool gas heater installation and maintenance procedures.

For heat pumps to function correctly, they require a large amount of open space around them, free of any obstructions. Ensure your heater is placed on level ground, near a pool pump or filter, and that airflow is limited. Your heat pump’s owner’s manual will provide you with specific instructions on how to install it, including how much clearance it needs, where it should go, and where you should put it.

Running the heat pump for 72 hours straight or during the hottest part of the day will ensure that your pool reaches your preferred temperature. It is highly recommended to use a sun cover or blanket if you have one. After some use, condensation water will begin to appear around or inside your pool heat pump.

Final Words

Customers and technicians alike can expect years of trouble-free service from a well-installed heater. Nevertheless, if it’s put incorrectly, a heater may become a maintenance nightmare, with issues cropping up during its lifecycle.Check out more of our guides here.

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Charlie Hardcastle


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