How To Plumb A Pool With Flowreversal Technology

Complete Guide to FlowReversal Pool Plumbing for Maximum Heating Efficiency

FlowReversal technology is one of the most advanced and effective ways to improve swimming pool heating efficiency. By changing how water circulates through the pool during heating, this system dramatically reduces energy use while increasing heating performance.

This guide explains how to plumb a pool using FlowReversal technology, how the system works, and why it can heat a pool faster and more efficiently than traditional plumbing methods.

What Is FlowReversal Technology?

FlowReversal is a patented pool plumbing method that improves heating efficiency by reversing the direction of water flow during heating cycles.

In a traditional pool system:

• Water is pulled from the surface (skimmers) and main drain

• Heated water is returned through wall return jets

With FlowReversal:

• Water is drawn from the top (surface layer)

• Heated water is returned to the bottom of the pool (main drain area)

This creates a much more efficient heat distribution pattern.

Why FlowReversal Works So Well

Water naturally stratifies by temperature:

• Warm water rises

• Cold water sinks

Traditional systems fight this natural behavior.

FlowReversal works with it by:

• Pulling warm water from the top

• Reheating it

• Returning it to the bottom

This creates a thermal inversion layer, storing heat more efficiently throughout the pool.

Key Benefit: Faster Heating at Lower Cost

FlowReversal systems can:

• Heat pools in 1/3 the time

• Reduce heating costs by up to 2/3 

This makes it one of the most energy-efficient pool heating methods available.

Core Components of a FlowReversal Plumbing System

A FlowReversal system requires specific plumbing design and components.

1. Separate Plumbing Lines (CRITICAL)

The system requires:

• A dedicated main drain line

• A separate skimmer line

These must NOT be combined.

If they are combined, the system will not function properly and may cause pressure issues.

2. FlowReversal Valve System

Originally, the system used:

• X-body valve

• T-body valve

These valves controlled the direction of water flow.

Modern systems now use:

• Standard industry valves

• FlowReversal modules

to achieve the same effect.

3. Proportioning Valve (Flow Control)

A proportioning valve is used to:

• Control how much water flows through the heater

• Balance system pressure

👉 Related: Diagram for Using a Proportioner T-Valve

4. Heater or Heat Source

FlowReversal works with:

• Gas heaters

• Heat pumps

• Solar systems (including SolarAttic)

How FlowReversal Plumbing Works (Step-by-Step)

Normal Mode (Standard Circulation)

When the heater is OFF:

1. Water is pulled from skimmer and main drain

2. Water is filtered

3. Water returns through wall jets

This maintains normal cleaning and circulation.

Heating Mode (FlowReversal Activated)

When heating is ON:

1. Water is pulled from the surface (warmest layer)

2. Water passes through the heater

3. Heated water is returned to the bottom of the pool

This pushes cold water upward and maximizes heat transfer.

Plumbing Layout for FlowReversal Systems

A FlowReversal system requires a modified plumbing layout.

Key Design Requirements

✔ Separate skimmer and drain lines

✔ Ability to reverse flow direction

✔ Proper valve placement

✔ Dedicated return pathways

Retrofit Installation

To retrofit an existing pool:

• Cut the combined skimmer/main drain line

• Install a new dedicated main drain line

• Add flow reversal valve system

This can often be done during resurfacing or renovation.

FlowReversal + Solar Heating (Best Combination)

FlowReversal works extremely well with solar pool heating systems like SolarAttic.

Why?

• Solar heating adds heat gradually

• FlowReversal distributes it efficiently

• Heat is stored in lower pool layers

This combination can significantly increase overall system performance.

Additional Performance Benefits

Works Well With Pool Covers

When used with a solar pool cover:

• Heat is retained at the surface

• FlowReversal redistributes heat below

This improves efficiency even further.

Improved Heat Distribution

FlowReversal creates:

• Even temperature throughout pool

• Reduced heat loss

• More consistent swimming comfort

Important Installation Considerations

Skimmer Line Must Stay Active

The skimmer must always function to:

• Remove debris

• Maintain water clarity

This is why it must remain a separate line.

Valve Control Is Essential

The system must be able to:

• Switch between normal flow and reversed flow

This can be:

• Manual

• Automated

Automation Recommended

Automating the system ensures:

• Flow reverses only when heating is active

• System runs efficiently without manual input

Common Mistakes to Avoid

❌ Combining skimmer and drain lines

❌ Not installing proper valves

❌ Incorrect flow direction

❌ Lack of flow control

Final Thoughts

FlowReversal technology is one of the most powerful upgrades you can make to a pool heating system. By changing how water circulates during heating, it dramatically improves efficiency and reduces operating costs.

When combined with solar systems like SolarAttic, FlowReversal can create one of the most energy-efficient pool heating solutions available today.