It’s true that FAFCO brand solar pool heating panels, which have a subheader for flow distribution, add a higher back pressure also known as head pressure, to pool pumps.
Here are the facts:
- A FAFCO Sunsaver solar pool heating panel does have five times the pressure loss (also known as head loss) than some competitors’ panels at the recommended flow rate.
- FAFCO systems use 2″ panel headers and PVC plumbing versus 1-1/2″ by some competitors, which does help, but there is restriction in the headers that choke the actual header inside diameter down to 1-1/2″.
- As a rule of thumb, FAFCO systems will typically add about 5 PSI, or 11.5 feet of head to the pump, which is substantially more than other brands available.
If someone tries to convince you that adding solar pool heating panels to your pool will burn up your pump, it’s not really an issue. However, “back pressure” from FAFCO’s subheader and panels will result in less flow than just about any other brand, and the iSwim brand we represent has the lowest back pressure in the industry. Added pressure means less flow and less performance, increases pool pumping costs in many cases, and causes annoyances like bubbles in the pool, especially when filters get dirty.