My total for the heating parts was about $300 in June 2020. My shopping list was based on someone else’s list of the same kinds of parts, but many substituted for availability, a different manufacturer, size, etc. Generally, this is what you’ll need to build your own heating system.
Heater
You have a lot of options here depending on the location of your pool to your home, utilities and other structures. If you already have a natural gas connection in your backward for a barbeque or other appliance, you might consider a natural gas water heater instead of propane. Spend some time looking at options for tankless heaters.
Water Pump
You’ll place this in one end of the pool to push water out through a hose and into the heater. The pump below will be pushing water through about 20 feet of hose and a filter before reaching the heater. Consider the hose length and any uphill routes when you pick a pump. Also, keep in mind the maximum water pressure (PSI) allowed by the water heater.
Hoses
Use hoses that are made without chemicals that can escape when heated by the water traveling through them.
- Drinking water hoses (x4)
Debris Filter
I use this between the water pump and heater. The pump will usually have a inlet screen for catching larger debris. This filter will trap smaller pieces and keep them out of your heater.
Hose Adapters
I bought these and did not need them, but they were inexpensive and are in the garden toolbox.
Propane Cylinder
You have a lot of options here on size and number of cylinders you need. The propane heater above included an adapter for propane cylinders. If you already have one or two cylinders for your barbeque or firepit, you may be in good shape.
Batteries for Heater
The portable heater above uses D batteries for the spark igniter and display electronics.