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 backyard for a barbecue or other appliance, you might consider a natural gas water heater instead of propane. Spend some time looking at options for tankless heaters.
Key Features to Look For:
- Outdoor rated for weather resistance
- Adjustable temperature controls
- Low water pressure activation
- Safety shutoff features
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.
Pump Considerations:
- Must be submersible and safe for pool use
- Check flow rate compatibility with heater requirements
- Ensure adequate pressure for your hose length
- GFCI outlet required for safety
Hoses
Use hoses that are made without chemicals that can escape when heated by the water traveling through them. Regular garden hoses may contain materials not safe for drinking water, especially when heated.
- Drinking water hoses (x4)
Why Drinking Water Hoses:
- Safe for contact with heated water
- No harmful chemical leaching
- Food-grade materials
- Better durability with temperature changes
Debris Filter
I use this between the water pump and heater. The pump will usually have an inlet screen for catching larger debris. This filter will trap smaller pieces and keep them out of your heater.
Filter Benefits:
- Protects heater from damage
- Improves water quality
- Easy to clean and maintain
- Visible when it needs attention
Hose Adapters
I bought these and did not need them, but they were inexpensive and are in the garden toolbox for future projects.
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 barbecue or firepit, you may be in good shape.
Cylinder Size Considerations:
- 20 lb tanks: Standard BBQ size, more portable
- 30 lb tanks: Longer runtime, fewer refills needed
- 40 lb tanks: Maximum for most residential use
Batteries for Heater
The portable heater above uses D batteries for the spark igniter and display electronics.
Cost Breakdown (June 2020)
| Component | Approximate Cost |
|---|---|
| Tankless Water Heater | $150 |
| Submersible Pump | $60 |
| Drinking Water Hoses (4x) | $40 |
| Inlet Filter | $15 |
| Propane Cylinder | $25 |
| Misc. Adapters & Batteries | $10 |
| Total | ~$300 |
Safety Considerations
Electrical Safety:
- Always use GFCI outlets for the pump
- Keep electrical connections away from water
- Test GFCI regularly
Propane Safety:
- Check all connections for leaks
- Store propane cylinders upright and secure
- Follow manufacturer’s safety guidelines
- Have proper ventilation around heater
Next Steps
With all parts in hand, the next post will cover the assembly process and initial testing of the system. We’ll go through step-by-step instructions for connecting everything safely and efficiently.